gwc-general — Gnome Wave Cleaner discussion list

Re: [Gwc-general] compile errors with gwc-0.20-07

[Jeff W. <we...@ya...>]

Robin,

I haven't had time to dig into this, but one thing for sure:

DO NOT USE ANOTHER DISTRIBUTION OF MESCHACH!

I fixed a serious memory leak in that code.  I reported it to the 
maintainers
of the package, but I never saw they did anything about it.

I will try to find out how the meschach archive you found is different from
the one I found (and fixed).  At first glance it looks like someone cleaned
it up to use ANSI-C, which is good, but I don't know if they fixed the 
memory
leak.

Cheers,
Jeff Welty

Robin Cook wrote:

>Ok I seem to have gotten it working by replacing the meschach that is in
>gwc-0.20-07.tgz with the mesch12b.tar.gz from
>http://www.math.uiowa.edu/~dstewart/meschach/ and changing the
>Makefile.in a bit more (see attached Makefile.in.diff.)
>
>Only difference from what I posted before is this
>
>
>@@ -46,7 +46,7 @@
>        cp meschach/meschach.a .
>
> meschach/meschach.a :
>-       (cd meschach ; ./configure --with-sparse ; make part1 ; make
>part2 ; make part3 ; cp machine.h ..)
>+       (cd meschach ; ./configure --with-sparse --with-float ; make
>all ; cp machine.h ..)
>
> test : test.c
>        $(CC) test.c $(LFLAGS) -g -lrfftw -lfftw -lm -o test
>
>
>Without changing the make parts to make all, I was getting a linking
>error of undefined zv_free and zm_free.  I also set the --with-float
>since the fftw3 is also compiled that way.  Not sure if that is correct
>or not.
>
>Though I don't think the configure for meschach 12b is working correctly
>because of this error....
>
>
>cc -DCONFIGDIR=\"/gnome_wave_cleaner/config/\" -DDATADIR=\"/usr/share\"
>-DLIBDIR=\"/usr/lib\" -DAPPNAME=\"gnome_wave_cleaner\" -O
>-march=athlon-mp -mmmx -mfpmath=sse -msse -m3dnow -pipe -O3 -Wall
>-DHAVE_ALSA -DHAVE_FFTW3 -DFFTWPREC=1 `pkg-config --cflags libgnome-2.0
>libgnomeui-2.0 gtk+-2.0` `pkg-config --cflags sndfile`   -c -o
>soundfile.o soundfile.c
>(cd meschach ; ./configure --with-sparse --with-float ; make all ; cp
>machine.h ..)
>creating cache ./config.cache
>checking for acc... no
>checking for cc... (cached) no
>checking for gcc... (cached) no
>checking for cc... (cached) no
>configure: error: no acceptable cc found in $PATH
>make[2]: Entering directory `/usr/src/gwc-0.20-07/meschach'
>make[2]: warning: jobserver unavailable: using -j1.  Add `+' to parent
>make rule.
>
>
>CuZnDragon
>Robin Cook
>
>On Wed, 2004-10-06 at 23:21 -0500, Robin Cook wrote:
>  
>
>>Compiling this with gcc 3.4.2 and glibc 2.3.3 with nptl enabled
>>
>>=================================================
>>
>>This really doesn't effect the compiling error but something I needed to
>>do.
>>
>>Modified Makefile.in to not over write my environment variable CFLAGS
>>and to not install in /usr/local as this is for a distribution.
>>
>>see attached patch file Makefile.in.diff
>>
>>=================================================
>>
>>Then was getting this error.....
>>
>>computing machine epsilon(s)
>>cc -o macheps dmacheps.c
>>./configure: line 675: macheps: command not found
>>./configure: line 679: macheps: command not found
>>./configure: line 679: macheps: command not found
>>./configure: line 679: macheps: command not found
>>cc -o macheps fmacheps.c
>>./configure: line 687: macheps: command not found
>>./configure: line 691: macheps: command not found
>>./configure: line 691: macheps: command not found
>>./configure: line 691: macheps: command not found
>>computing M_MAX_INT
>>cc -o maxint maxint.c
>>./configure: line 700: maxint: command not found
>>./configure: line 704: maxint: command not found
>>./configure: line 704: maxint: command not found
>>./configure: line 704: maxint: command not found
>>checking char \\0 vs. float zeros
>>
>>
>>Fixed by modifying configure in the meschach directory
>>
>>see attached patch file configure-mach.diff
>>
>>========================================================================
>>
>>Now I am getting this error and not sure how to fix it.
>>
>>cp meschach/meschach.a .
>>cc dialog.o gwc.o audio_device.o audio_edit.o audio_util.o gtkled.o
>>gtkledbar.o preferences.o drawing.o amplify.o denoise.o undo.o declick.o
>>sample_block.o decrackle.o stat.o dethunk.o i0.o i1.o chbevl.o markers.o
>>encode.o soundfile.o -g `pkg-config --cflags --libs libgnome-2.0
>>libgnomeui-2.0 gtk+-2.0` `pkg-config --libs sndfile` meschach.a -lasound
>>-lfftw3f -lm -o gwc
>>meschach.a(memory.o)(.text+0xa0b): In function `m_resize':
>>: undefined reference to `MEM_COPY'
>>meschach.a(memory.o)(.text+0xaff): In function `m_resize':
>>: undefined reference to `MEM_COPY'
>>meschach.a(memory.o)(.text+0xc7b): In function `m_resize':
>>: undefined reference to `MEM_COPY'
>>meschach.a(matop.o)(.text+0x1055): In function `ms_mltadd':
>>: undefined reference to `MEM_COPY'
>>meschach.a(matop.o)(.text+0x109b): In function `ms_mltadd':
>>: undefined reference to `MEM_COPY'
>>meschach.a(matop.o)(.text+0x11ed): more undefined references to
>>`MEM_COPY' follow
>>meschach.a(machine.o)(.text+0xf9): In function `__zero__':
>>: undefined reference to `MEM_ZERO'
>>meschach.a(lufactor.o)(.text+0x68f): In function `m_inverse':
>>: undefined reference to `MEM_COPY'
>>meschach.a(lufactor.o)(.text+0x6ea): In function `m_inverse':
>>: undefined reference to `MEM_COPY'
>>meschach.a(lufactor.o)(.text+0x75f): In function `m_inverse':
>>: undefined reference to `MEM_COPY'
>>meschach.a(lufactor.o)(.text+0x86d): In function `m_inverse':
>>: undefined reference to `MEM_COPY'
>>make[1]: Leaving directory `/usr/src/gwc-0.20-07'
>>meschach.a(lufactor.o)(.text+0x956): In function `m_inverse':
>>: undefined reference to `MEM_COPY'
>>meschach.a(lufactor.o)(.text+0x9b1): more undefined references to
>>`MEM_COPY' follow
>>meschach.a(sprow.o)(.text+0x3e3): In function `sprow_xpd':
>>: undefined reference to `MEM_ZERO'
>>meschach.a(sprow.o)(.text+0x1db2): In function `sprow_set_val':
>>: undefined reference to `MEM_COPY'
>>meschach.a(iter0.o)(.text+0x552): In function `iter_copy2':
>>: undefined reference to `MEM_COPY'
>>meschach.a(iter0.o)(.text+0x69f): In function `iter_copy':
>>: undefined reference to `MEM_COPY'
>>meschach.a(copy.o)(.text+0xab): In function `_m_copy':
>>: undefined reference to `MEM_COPY'
>>meschach.a(copy.o)(.text+0x14c): In function `_v_copy':
>>: undefined reference to `MEM_COPY'
>>meschach.a(copy.o)(.text+0x205): more undefined references to `MEM_COPY'
>>follow
>>collect2: ld returned 1 exit status
>>    
>>
>
>  
>
>------------------------------------------------------------------------
>
>--- Makefile.in.orig	2004-10-07 00:26:53.607824232 -0500
>+++ Makefile.in	2004-10-07 00:27:59.232847712 -0500
>@@ -4,7 +4,7 @@
> PREFIX=/usr
> SYSCONFDIR=/etc
> 
>-CFLAGS = -DCONFIGDIR=\"/$(APPNAME)/config/\" -DDATADIR=\"$(DATADIR)\" -DLIBDIR=\"$(LIBDIR)\" -DAPPNAME=\"$(APPNAME)\" -O3 -Wall @ALSAHDR@ @FFTWHDR@ @FFTWPREC@ -mcpu=@UNAME_MACHINE@ -march=@UNAME_MACHINE@ `pkg-config --cflags libgnome-2.0 libgnomeui-2.0 gtk+-2.0` `pkg-config --cflags sndfile`
>+CFLAGS = -DCONFIGDIR=\"/$(APPNAME)/config/\" -DDATADIR=\"$(DATADIR)\" -DLIBDIR=\"$(LIBDIR)\" -DAPPNAME=\"$(APPNAME)\" @CFLAGS@ -Wall @ALSAHDR@ @FFTWHDR@ @FFTWPREC@ `pkg-config --cflags libgnome-2.0 libgnomeui-2.0 gtk+-2.0` `pkg-config --cflags sndfile`
> LFLAGS = -g `pkg-config --cflags --libs libgnome-2.0 libgnomeui-2.0 gtk+-2.0` `pkg-config --libs sndfile`
> LIBS= meschach.a @ALSALIB@ @FFTWLIB@ -lm
> 
>@@ -24,7 +24,7 @@
> gwc : $(OBJS) meschach.a
> 	$(CC) $(OBJS) $(LFLAGS) $(LIBS) -o gwc
> 
>-DESTDIR=/usr/local
>+DESTDIR=/usr
> HELPDIR=$(DATADIR)/gnome/help/$(APPNAME)
> 
> install : gwc
>@@ -46,7 +46,7 @@
> 	cp meschach/meschach.a .
> 
> meschach/meschach.a :
>-	(cd meschach ; ./configure --with-sparse ; make part1 ; make part2 ; make part3 ; cp machine.h ..)
>+	(cd meschach ; ./configure --with-sparse --with-float ; make all ; cp machine.h ..)
> 
> test : test.c
> 	$(CC) test.c $(LFLAGS) -g -lrfftw -lfftw -lm -o test
>  
>

Re: [Gwc-general] compile errors with gwc-0.20-07

[Robin C. <rc...@wy...>]

Ok I seem to have gotten it working by replacing the meschach that is in
gwc-0.20-07.tgz with the mesch12b.tar.gz from
http://www.math.uiowa.edu/~dstewart/meschach/ and changing the
Makefile.in a bit more (see attached Makefile.in.diff.)

Only difference from what I posted before is this


@@ -46,7 +46,7 @@
        cp meschach/meschach.a .

 meschach/meschach.a :
-       (cd meschach ; ./configure --with-sparse ; make part1 ; make
part2 ; make part3 ; cp machine.h ..)
+       (cd meschach ; ./configure --with-sparse --with-float ; make
all ; cp machine.h ..)

 test : test.c
        $(CC) test.c $(LFLAGS) -g -lrfftw -lfftw -lm -o test


Without changing the make parts to make all, I was getting a linking
error of undefined zv_free and zm_free.  I also set the --with-float
since the fftw3 is also compiled that way.  Not sure if that is correct
or not.

Though I don't think the configure for meschach 12b is working correctly
because of this error....


cc -DCONFIGDIR=\"/gnome_wave_cleaner/config/\" -DDATADIR=\"/usr/share\"
-DLIBDIR=\"/usr/lib\" -DAPPNAME=\"gnome_wave_cleaner\" -O
-march=athlon-mp -mmmx -mfpmath=sse -msse -m3dnow -pipe -O3 -Wall
-DHAVE_ALSA -DHAVE_FFTW3 -DFFTWPREC=1 `pkg-config --cflags libgnome-2.0
libgnomeui-2.0 gtk+-2.0` `pkg-config --cflags sndfile`   -c -o
soundfile.o soundfile.c
(cd meschach ; ./configure --with-sparse --with-float ; make all ; cp
machine.h ..)
creating cache ./config.cache
checking for acc... no
checking for cc... (cached) no
checking for gcc... (cached) no
checking for cc... (cached) no
configure: error: no acceptable cc found in $PATH
make[2]: Entering directory `/usr/src/gwc-0.20-07/meschach'
make[2]: warning: jobserver unavailable: using -j1.  Add `+' to parent
make rule.


CuZnDragon
Robin Cook

On Wed, 2004-10-06 at 23:21 -0500, Robin Cook wrote:
> Compiling this with gcc 3.4.2 and glibc 2.3.3 with nptl enabled
> 
> =================================================
> 
> This really doesn't effect the compiling error but something I needed to
> do.
> 
> Modified Makefile.in to not over write my environment variable CFLAGS
> and to not install in /usr/local as this is for a distribution.
> 
> see attached patch file Makefile.in.diff
> 
> =================================================
> 
> Then was getting this error.....
> 
> computing machine epsilon(s)
> cc -o macheps dmacheps.c
> ./configure: line 675: macheps: command not found
> ./configure: line 679: macheps: command not found
> ./configure: line 679: macheps: command not found
> ./configure: line 679: macheps: command not found
> cc -o macheps fmacheps.c
> ./configure: line 687: macheps: command not found
> ./configure: line 691: macheps: command not found
> ./configure: line 691: macheps: command not found
> ./configure: line 691: macheps: command not found
> computing M_MAX_INT
> cc -o maxint maxint.c
> ./configure: line 700: maxint: command not found
> ./configure: line 704: maxint: command not found
> ./configure: line 704: maxint: command not found
> ./configure: line 704: maxint: command not found
> checking char \\0 vs. float zeros
> 
> 
> Fixed by modifying configure in the meschach directory
> 
> see attached patch file configure-mach.diff
> 
> ========================================================================
> 
> Now I am getting this error and not sure how to fix it.
> 
> cp meschach/meschach.a .
> cc dialog.o gwc.o audio_device.o audio_edit.o audio_util.o gtkled.o
> gtkledbar.o preferences.o drawing.o amplify.o denoise.o undo.o declick.o
> sample_block.o decrackle.o stat.o dethunk.o i0.o i1.o chbevl.o markers.o
> encode.o soundfile.o -g `pkg-config --cflags --libs libgnome-2.0
> libgnomeui-2.0 gtk+-2.0` `pkg-config --libs sndfile` meschach.a -lasound
> -lfftw3f -lm -o gwc
> meschach.a(memory.o)(.text+0xa0b): In function `m_resize':
> : undefined reference to `MEM_COPY'
> meschach.a(memory.o)(.text+0xaff): In function `m_resize':
> : undefined reference to `MEM_COPY'
> meschach.a(memory.o)(.text+0xc7b): In function `m_resize':
> : undefined reference to `MEM_COPY'
> meschach.a(matop.o)(.text+0x1055): In function `ms_mltadd':
> : undefined reference to `MEM_COPY'
> meschach.a(matop.o)(.text+0x109b): In function `ms_mltadd':
> : undefined reference to `MEM_COPY'
> meschach.a(matop.o)(.text+0x11ed): more undefined references to
> `MEM_COPY' follow
> meschach.a(machine.o)(.text+0xf9): In function `__zero__':
> : undefined reference to `MEM_ZERO'
> meschach.a(lufactor.o)(.text+0x68f): In function `m_inverse':
> : undefined reference to `MEM_COPY'
> meschach.a(lufactor.o)(.text+0x6ea): In function `m_inverse':
> : undefined reference to `MEM_COPY'
> meschach.a(lufactor.o)(.text+0x75f): In function `m_inverse':
> : undefined reference to `MEM_COPY'
> meschach.a(lufactor.o)(.text+0x86d): In function `m_inverse':
> : undefined reference to `MEM_COPY'
> make[1]: Leaving directory `/usr/src/gwc-0.20-07'
> meschach.a(lufactor.o)(.text+0x956): In function `m_inverse':
> : undefined reference to `MEM_COPY'
> meschach.a(lufactor.o)(.text+0x9b1): more undefined references to
> `MEM_COPY' follow
> meschach.a(sprow.o)(.text+0x3e3): In function `sprow_xpd':
> : undefined reference to `MEM_ZERO'
> meschach.a(sprow.o)(.text+0x1db2): In function `sprow_set_val':
> : undefined reference to `MEM_COPY'
> meschach.a(iter0.o)(.text+0x552): In function `iter_copy2':
> : undefined reference to `MEM_COPY'
> meschach.a(iter0.o)(.text+0x69f): In function `iter_copy':
> : undefined reference to `MEM_COPY'
> meschach.a(copy.o)(.text+0xab): In function `_m_copy':
> : undefined reference to `MEM_COPY'
> meschach.a(copy.o)(.text+0x14c): In function `_v_copy':
> : undefined reference to `MEM_COPY'
> meschach.a(copy.o)(.text+0x205): more undefined references to `MEM_COPY'
> follow
> collect2: ld returned 1 exit status
> 

[Gwc-general] compile errors with gwc-0.20-07

[Robin C. <rc...@wy...>]

Compiling this with gcc 3.4.2 and glibc 2.3.3 with nptl enabled

=================================================

This really doesn't effect the compiling error but something I needed to
do.

Modified Makefile.in to not over write my environment variable CFLAGS
and to not install in /usr/local as this is for a distribution.

see attached patch file Makefile.in.diff

=================================================

Then was getting this error.....

computing machine epsilon(s)
cc -o macheps dmacheps.c
./configure: line 675: macheps: command not found
./configure: line 679: macheps: command not found
./configure: line 679: macheps: command not found
./configure: line 679: macheps: command not found
cc -o macheps fmacheps.c
./configure: line 687: macheps: command not found
./configure: line 691: macheps: command not found
./configure: line 691: macheps: command not found
./configure: line 691: macheps: command not found
computing M_MAX_INT
cc -o maxint maxint.c
./configure: line 700: maxint: command not found
./configure: line 704: maxint: command not found
./configure: line 704: maxint: command not found
./configure: line 704: maxint: command not found
checking char \\0 vs. float zeros


Fixed by modifying configure in the meschach directory

see attached patch file configure-mach.diff

========================================================================

Now I am getting this error and not sure how to fix it.

cp meschach/meschach.a .
cc dialog.o gwc.o audio_device.o audio_edit.o audio_util.o gtkled.o
gtkledbar.o preferences.o drawing.o amplify.o denoise.o undo.o declick.o
sample_block.o decrackle.o stat.o dethunk.o i0.o i1.o chbevl.o markers.o
encode.o soundfile.o -g `pkg-config --cflags --libs libgnome-2.0
libgnomeui-2.0 gtk+-2.0` `pkg-config --libs sndfile` meschach.a -lasound
-lfftw3f -lm -o gwc
meschach.a(memory.o)(.text+0xa0b): In function `m_resize':
: undefined reference to `MEM_COPY'
meschach.a(memory.o)(.text+0xaff): In function `m_resize':
: undefined reference to `MEM_COPY'
meschach.a(memory.o)(.text+0xc7b): In function `m_resize':
: undefined reference to `MEM_COPY'
meschach.a(matop.o)(.text+0x1055): In function `ms_mltadd':
: undefined reference to `MEM_COPY'
meschach.a(matop.o)(.text+0x109b): In function `ms_mltadd':
: undefined reference to `MEM_COPY'
meschach.a(matop.o)(.text+0x11ed): more undefined references to
`MEM_COPY' follow
meschach.a(machine.o)(.text+0xf9): In function `__zero__':
: undefined reference to `MEM_ZERO'
meschach.a(lufactor.o)(.text+0x68f): In function `m_inverse':
: undefined reference to `MEM_COPY'
meschach.a(lufactor.o)(.text+0x6ea): In function `m_inverse':
: undefined reference to `MEM_COPY'
meschach.a(lufactor.o)(.text+0x75f): In function `m_inverse':
: undefined reference to `MEM_COPY'
meschach.a(lufactor.o)(.text+0x86d): In function `m_inverse':
: undefined reference to `MEM_COPY'
make[1]: Leaving directory `/usr/src/gwc-0.20-07'
meschach.a(lufactor.o)(.text+0x956): In function `m_inverse':
: undefined reference to `MEM_COPY'
meschach.a(lufactor.o)(.text+0x9b1): more undefined references to
`MEM_COPY' follow
meschach.a(sprow.o)(.text+0x3e3): In function `sprow_xpd':
: undefined reference to `MEM_ZERO'
meschach.a(sprow.o)(.text+0x1db2): In function `sprow_set_val':
: undefined reference to `MEM_COPY'
meschach.a(iter0.o)(.text+0x552): In function `iter_copy2':
: undefined reference to `MEM_COPY'
meschach.a(iter0.o)(.text+0x69f): In function `iter_copy':
: undefined reference to `MEM_COPY'
meschach.a(copy.o)(.text+0xab): In function `_m_copy':
: undefined reference to `MEM_COPY'
meschach.a(copy.o)(.text+0x14c): In function `_v_copy':
: undefined reference to `MEM_COPY'
meschach.a(copy.o)(.text+0x205): more undefined references to `MEM_COPY'
follow
collect2: ld returned 1 exit status

[Gwc-general] guidelines for settings?

[Johan De G. <joh...@sk...>]

Hello,

Slowly getting started with denoising a tape. First results are good, after 
having played a bit with the "reduction" setting. Very easy to get a 
noticable improvement without artefacts.

But is there any guideline as to the use of the use of the windowing function 
and the noise suppresion method? Are they more or less equivalent, or are 
they for some specific type of noises? (like as "for AC noise" or "constant 
hiss")

Also, what is the specific influence of the fft-size? Does it bear on the 
precision of the result (less artefacts vs more cpu), or is it more related 
to the dynamics of the sound (as in shorter fft leaves more "live feel")?

Thanks,
Johan De Groote

Re: [Gwc-general] new and already hitting problems...

[Jeff W. <we...@ya...>]

Johan,

This almost certainly means that the headers on the wavefiles created 
with Ardour
are malformed.  It is libsndfile that reports the error, and GWC relays 
it to you
in a human readable form.

jw

Johan De Groote wrote:

>Hello,
>
>I'm fairly new to audio on linux, so please be patient...
>
>I try to use GWC to clean recordings from cassette tape and LP's (both 33 and 
>78 rpm). The idea is use gwc as an alternative to Cool Edit Pro. But as my pc 
>is set up with Alsa I have to use the oss emulation layer, or record in 
>another application. But here comes the problem.
>
>I record with Ardour (this seem to work the best at this moment). Then I cut 
>the recording and export the pieces as .wav (or some other format). This is 
>where the problem starts. I tried exporting as .wav with 
>float/32bit/24bit/16bit samples. Only with 16bit samples can I open the file 
>[b] and play [/b]. The other sample formats give a "soundfile format not 
>allowed" error, but as far as I can see, the file is completely read. Only 
>the sound is not played back. The cursor moves, but nothing comes out the 
>speakers.
>
>I get the same with .au and .raw formats.
>
>Using gwc 0.20-7, libsndfile 1.0.9 and fftw 3.0.1. If more info needed, just 
>ask. I'm not that knowledgable that I know what to include.
>
>Anyone an idea how I can verify if the files are really bad (the equivalent of 
>an exifreader)? Anyone an idea of a recording application (using alsa or 
>jack) that can output .wav files in float/32bit or 24bit that gwc can 100% 
>import?
>
>Thanks in advance,
>Johan De Groote
>
>
>-------------------------------------------------------
>This SF.Net email is sponsored by BEA Weblogic Workshop
>FREE Java Enterprise J2EE developer tools!
>Get your free copy of BEA WebLogic Workshop 8.1 today.
>http://ads.osdn.com/?ad_id=5047&alloc_id=10808&op=click
>_______________________________________________
>Gwc-general mailing list
>Gwc...@li...
>https://lists.sourceforge.net/lists/listinfo/gwc-general
>
>  
>

[Gwc-general] new and already hitting problems...

[Johan De G. <joh...@sk...>]

Hello,

I'm fairly new to audio on linux, so please be patient...

I try to use GWC to clean recordings from cassette tape and LP's (both 33 and 
78 rpm). The idea is use gwc as an alternative to Cool Edit Pro. But as my pc 
is set up with Alsa I have to use the oss emulation layer, or record in 
another application. But here comes the problem.

I record with Ardour (this seem to work the best at this moment). Then I cut 
the recording and export the pieces as .wav (or some other format). This is 
where the problem starts. I tried exporting as .wav with 
float/32bit/24bit/16bit samples. Only with 16bit samples can I open the file 
[b] and play [/b]. The other sample formats give a "soundfile format not 
allowed" error, but as far as I can see, the file is completely read. Only 
the sound is not played back. The cursor moves, but nothing comes out the 
speakers.

I get the same with .au and .raw formats.

Using gwc 0.20-7, libsndfile 1.0.9 and fftw 3.0.1. If more info needed, just 
ask. I'm not that knowledgable that I know what to include.

Anyone an idea how I can verify if the files are really bad (the equivalent of 
an exifreader)? Anyone an idea of a recording application (using alsa or 
jack) that can output .wav files in float/32bit or 24bit that gwc can 100% 
import?

Thanks in advance,
Johan De Groote

[Gwc-general] 0.20-06 is out for testing

[Jeff W. <we...@ya...>]

I've put a new version on sourceforge.  This only has configuration file 
changes (one small change to code to eliminate 4 warning messages).

I hope this will configure/compile in a gnome2-only environment.  I 
couldn't find any info for where the install should go, so if you look at
the top of the Makefile you'll see the DATADIR,LIBDIR,PREFIX and 
SYSCONFDIR variables hard-coded.  If anyone knows the proper
way to handle those Makefile environment variables for gnome2, please help!

Let me know how this goes...

jw

Re: [Gwc-general] "Soundfile format not allowed."

[DJ A. <ast...@dj...>]

Jeff Welty wrote:

> Andy,
>
> That is odd.  My guess is that arecord is writing a malformed header 
> to your audio
> file, because GWC will accept a 24 bit/48khz format via libsndfile,  
> but libsndfile
> seems to not recognize the format.
>
> jw
>
> DJ Astroboy wrote:
>
>> I've been using gwc for several years very successfully with CD 
>> format wav files.
>> Now I guess I'm lost trying to understand the different sound 
>> formats, but I want to try to edit
>> 24bit/48khz files in gwc (.19-10) but I'm getting a "Soundfile format 
>> not allowed." error.
>> Reading the libsndfile info, I thought this would be possible. I 
>> recorded with
>> arecord -D plughw:0,0 -f S24_LE -r48000 -c 2  -t wav
>
>
>
I have found the secret formula! The format  needs to  be  S24_3LE.  I 
don't understand why, but it
works. Undocumented, but  I read betweeen the lines in some old ALSA 
list posts and there you have
it. Now if I could find a corresponding magic incantation for ecasound....

Andy

Re: [Gwc-general] .toc > .ogg

[Jeff W. <we...@ha...>]

Justin,

This sounds like a fantastic project.  I'm glad GWC is being used.  I've 
always considered it my way to "give back" to the open source community 
where I still remain heavily on the receiving end :-)

As for the .toc + wavs -> oggs  application, speaking for myself, I'd 
just write a little shell, or perl script to do it.  I seem to recall 
some tools that could manipulate wav files -- if there were a tool that 
would extract a section of a wavfile the rest is just scripting.  I 
could probably write such an app in an evening if I had to (not 
necessarily offering, just saying that it's fairly easy).  I can float 
some wavfile C code your way if you like, so you'd have a template to 
start from. I'm guessing you may not have a lot of experience with 
wavfile data formats, and if so this would be a great way to get your 
feet wet.

Good luck with your project, and keep us informed as you make progress 
or need help.

Cheers,
Jeff Welty

Justin H Haynes wrote:

> First, thanks Jeff for writing this and thanks everyone else for 
> contributing.  I used gwc to process Mom and Dad's old vinyls and give 
> them back as CDs for Christmas last year, and they have really enjoyed 
> that.
>
> I like the feature Charles Morgan added for .ogg and .mp3.  I would 
> like to find some extra functionality or contribute it myself if its 
> not available.  Automation is important to me.  I like to go through, 
> drop song markers, generate .toc files and then use gwcbatch.pl to 
> process them all at once.  (I forget the exact process right now as I 
> havn't done it in a few months).  What I need is a way to go from .toc 
> file + ..wav(s) > .ogg files so they can be encoded in batch.  I have 
> 20Gb or so of wave files from vinyls with matching .toc files which I 
> edited to to put two sides on each CD.  Now I don't yet have a clean 
> way to make oggs out of them.
>
> If there is already a tool for this, please let me know.  If not, I'm 
> sure it would be pretty simple for me to write a shell script (or may 
> be my first C program as I have been wanting to start), to do this.
>
> I mentioned that automation was important to me.  I have approached 
> the Music Librarian at a local University about a project that would 
> use this software.  One of the project's goals would be to convert 
> their vinyl collection to .ogg file so they could be heard at 
> listening stations in the library.  (there are many other goals to the 
> project, but this one highlights the need for gwc or perhaps some of 
> its code)  I'd like to be very open about this project and share it 
> with the gwc and larger linux community.  The whole thing would be 
> open source and would hopefully be of use to other libraries.  I won't 
> go into any more detail here, but if anyone is interested, please 
> shoot me an email and I'll write you with some more details.  The 
> project takes into consideration copyright restrictions, automation of 
> the ripping prodedure with multiple turntables, client for searching 
> for a particular piece, cataloging the collection to LOC 
> specification, and a few other concerns.  The project is very slow to 
> start now as my plate is full, but I hope to start as soon as possible 
> with the help of another friend of mine.
>
> thanks!,
>
> Justin
>
>
>
> -------------------------------------------------------
> This SF.Net email is sponsored by The 2004 JavaOne(SM) Conference
> Learn from the experts at JavaOne(SM), Sun's Worldwide Java Developer
> Conference, June 28 - July 1 at the Moscone Center in San Francisco, CA
> REGISTER AND SAVE! http://java.sun.com/javaone/sf Priority Code NWMGYKND
> _______________________________________________
> Gwc-general mailing list
> Gwc...@li...
> https://lists.sourceforge.net/lists/listinfo/gwc-general
>

[Gwc-general] .toc > .ogg

[Justin H H. <Ju...@Ha...>]

First, thanks Jeff for writing this and thanks everyone else for 
contributing.  I used gwc to process Mom and Dad's old vinyls and give 
them back as CDs for Christmas last year, and they have really enjoyed that.

I like the feature Charles Morgan added for .ogg and .mp3.  I would like 
to find some extra functionality or contribute it myself if its not 
available.  Automation is important to me.  I like to go through, drop 
song markers, generate .toc files and then use gwcbatch.pl to process 
them all at once.  (I forget the exact process right now as I havn't 
done it in a few months).  What I need is a way to go from .toc file + 
.wav(s) > .ogg files so they can be encoded in batch.  I have 20Gb or so 
of wave files from vinyls with matching .toc files which I edited to to 
put two sides on each CD.  Now I don't yet have a clean way to make oggs 
out of them.

If there is already a tool for this, please let me know.  If not, I'm 
sure it would be pretty simple for me to write a shell script (or may be 
my first C program as I have been wanting to start), to do this.

I mentioned that automation was important to me.  I have approached the 
Music Librarian at a local University about a project that would use 
this software.  One of the project's goals would be to convert their 
vinyl collection to .ogg file so they could be heard at listening 
stations in the library.  (there are many other goals to the project, 
but this one highlights the need for gwc or perhaps some of its code)  
I'd like to be very open about this project and share it with the gwc 
and larger linux community.  The whole thing would be open source and 
would hopefully be of use to other libraries.  I won't go into any more 
detail here, but if anyone is interested, please shoot me an email and 
I'll write you with some more details.  The project takes into 
consideration copyright restrictions, automation of the ripping 
prodedure with multiple turntables, client for searching for a 
particular piece, cataloging the collection to LOC specification, and a 
few other concerns.  The project is very slow to start now as my plate 
is full, but I hope to start as soon as possible with the help of 
another friend of mine.

thanks!,

Justin

Re: [Gwc-general] "Soundfile format not allowed."

[Jeff W. <we...@ha...>]

Andy,

That is odd.  My guess is that arecord is writing a malformed header to 
your audio
file, because GWC will accept a 24 bit/48khz format via libsndfile,  but 
libsndfile
seems to not recognize the format.

Any advice from other list users?

jw

DJ Astroboy wrote:

> I've been using gwc for several years very successfully with CD format 
> wav files.
> Now I guess I'm lost trying to understand the different sound formats, 
> but I want to try to edit
> 24bit/48khz files in gwc (.19-10) but I'm getting a "Soundfile format 
> not allowed." error.
> Reading the libsndfile info, I thought this would be possible. I 
> recorded with
> arecord -D plughw:0,0 -f S24_LE -r48000 -c 2  -t wav
> How can I make this work?
> Thanks,
> Andy/DJ Astroboy
> http://www.djastro.com
>
>
>
> -------------------------------------------------------
> This SF.Net email is sponsored by: GNOME Foundation
> Hackers Unite!  GUADEC: The world's #1 Open Source Desktop Event.
> GNOME Users and Developers European Conference, 28-30th June in Norway
> http://2004/guadec.org
> _______________________________________________
> Gwc-general mailing list
> Gwc...@li...
> https://lists.sourceforge.net/lists/listinfo/gwc-general

Re: [Gwc-general] Fix for Menu Accelerators

[Jeff W. <we...@ha...>]

Stewart,

Thanks for tracking this down!

jw

Stewart Evans wrote:

> I mentioned a while ago that the old Gnome style of changing menu  
> accelerators wasn't working in 0.20.  After some hunting, I've 
> figured  out how to fix it.
>
> First - version 2.0 of GTK has this option turned off by default.  
> Its  doc says to add the line "gtk_can_change_accels = 1" to your
> ~/.gtkrc-2.0 file.  Simple, right?
>
> But wait!  Gnome 2 doesn't pay attention to that file, apparently  
> because of its ludicrous "gconf" scheme.  So I had to run 
> gconf-editor  (which, on my RedHat system, can be found in the 
> oh-so-intuitive menu  location System Tools -> More System Tools -> 
> Configuration Editor).  Running it warns me that this is not the 
> preferred way of setting my  desktop, but since there's no indication 
> of what *is* the preferred  way, I went ahead anyway.
>
> Anyway, now I only had to navigate down to "desktop -> gnome ->  
> interface" and scroll down until I found the "can_change_accels" item.
>
> IMHO, the Gnome2 developers deserve congratulations for approaching  
> Microsoft's level of user hostility and disregard for backwards  
> compatibility.  But I digress...anyway, the above worked for me.   
> Unfortunately F1 does not seem to be allowed as an accelerator (other  
> fkeys are okay) so I will have to get used to a new key binding.
>
> -- Stewart
>
>
> -------------------------------------------------------
> This SF.Net email is sponsored by: Oracle 10g
> Get certified on the hottest thing ever to hit the market... Oracle 
> 10g. Take an Oracle 10g class now, and we'll give you the exam FREE.
> http://ads.osdn.com/?ad_id=3149&alloc_id=8166&op=click
> _______________________________________________
> Gwc-general mailing list
> Gwc...@li...
> https://lists.sourceforge.net/lists/listinfo/gwc-general

[Gwc-general] "Soundfile format not allowed."

[DJ A. <ast...@dj...>]

I've been using gwc for several years very successfully with CD format 
wav files.
Now I guess I'm lost trying to understand the different sound formats, 
but I want to try to edit
24bit/48khz files in gwc (.19-10) but I'm getting a "Soundfile format 
not allowed." error.
Reading the libsndfile info, I thought this would be possible. I 
recorded with
arecord -D plughw:0,0 -f S24_LE -r48000 -c 2  -t wav
How can I make this work?
Thanks,
Andy/DJ Astroboy
http://www.djastro.com

[Gwc-general] Fix for Menu Accelerators

[Stewart E. <st...@lu...>]

I mentioned a while ago that the old Gnome style of changing menu  
accelerators wasn't working in 0.20.  After some hunting, I've figured  
out how to fix it.

First - version 2.0 of GTK has this option turned off by default.  Its  
doc says to add the line "gtk_can_change_accels = 1" to your
~/.gtkrc-2.0 file.  Simple, right?

But wait!  Gnome 2 doesn't pay attention to that file, apparently  
because of its ludicrous "gconf" scheme.  So I had to run gconf-editor  
(which, on my RedHat system, can be found in the oh-so-intuitive menu  
location System Tools -> More System Tools -> Configuration Editor).  
Running it warns me that this is not the preferred way of setting my  
desktop, but since there's no indication of what *is* the preferred  
way, I went ahead anyway.

Anyway, now I only had to navigate down to "desktop -> gnome ->  
interface" and scroll down until I found the "can_change_accels" item.

IMHO, the Gnome2 developers deserve congratulations for approaching  
Microsoft's level of user hostility and disregard for backwards  
compatibility.  But I digress...anyway, the above worked for me.   
Unfortunately F1 does not seem to be allowed as an accelerator (other  
fkeys are okay) so I will have to get used to a new key binding.

-- Stewart

[Gwc-general] FASD project: Online survey launched

[<ben...@id...>]

Dear Open Source developer

I am doing a research project on "Fun and Software Development" in which I kindly invite you to participate.
You will find the online survey under http://fasd.ethz.ch/qsf/. The questionnaire consists of 53 questions and you will need about 15 minutes to complete it.

With the FASD project (Fun and Software Development) we want to define the motivational significance of fun when software developers decide to engage in Open Source projects. What is special about our research project is that a similar survey is planned with software developers in commercial firms. This procedure allows the immediate comparison between the involved individuals and the conditions of production of these two development models. Thus we hope to obtain substantial new insights to the phenomenon of Open Source Development.


With many thanks for your participation,
Benno Luthiger


PS:
The results of the survey will be published under http://www.isu.unizh.ch/fuehrung/blprojects/FASD/.
We have set up the mailing list fa...@we... for this study. Please see http://fasd.ethz.ch/qsf/mailinglist_en.html for registration to this mailing list.

_______________________________________________________________________

Benno Luthiger
Swiss Federal Institute of Technology Zurich
8092 Zurich

Mail: benno.luthiger(at)id.ethz.ch
_______________________________________________________________________

[Gwc-general] gwc 0.20.3 issues

[Stewart E. <st...@lu...>]

1. I denoised a large file and got an "Undo will need..." dialog box.   
I chose "Skip undo" and the denoise proceeded, but the dialog remained,  
even after the denoise was done.  (Luckily the dialog window has a  
close button.)  A similar thing happened when I amplified the same  
file.

2. I've been seeing stray markers appear in places where I haven't  
placed any.  Often, zooming out will make them go away, but not always  
immediately - sometimes I have to zoom out a couple of times. Other  
times they go away when I scroll away and back. I haven't tracked down  
a consistently reproducible case.  I don't know whether this is related  
to the issue with the 'now playing' line jumping around, or not.

-- Stewart

Re: [Gwc-general] markers

[Jeff W. <we...@ha...>]

Yes, you are right about the markers.  duh.  Glad you understood what I 
meant :-)

If anyone on the list knows how to set a custom shortcut key for a 
gnome2 app,
please speak up!

jw

Stewart Evans wrote:

>
>
> On 05/12/2004 18:41, Jeff Welty wrote:
>
>> 1) It shouldn't be possible to put a marker (edit or song) in the  
>> same place
>
>
> Do you mean that you shouldn't be able to put two of the same kind in  
> the same place?  It seems like it could be desirable to have both an  
> edit and a song marker at the same place (but only one of each).
>
>> The keyboard shortcuts went away, because with Gnome (at least), you  
>> can
>> customize those, I haven't tried it in a while, so I've forgotten 
>> the  magic
>> incantation, but will check on it.  I think it was something simple  
>> like highlighting
>> the menu item and then just pressing the shortcut key you wanted to  
>> apply.
>
>
> That's what I thought it was too, but it doesn't seem to work - 
> neither  in gwc nor in the current version of balsa.  I wonder if this 
> has  changed in gnome2?  I've looked around but haven't yet found any  
> mention of a change.
>
> -- Stewart

Re: [Gwc-general] markers

[Stewart E. <st...@lu...>]

On 05/12/2004 18:41, Jeff Welty wrote:

> 1) It shouldn't be possible to put a marker (edit or song) in the  
> same place

Do you mean that you shouldn't be able to put two of the same kind in  
the same place?  It seems like it could be desirable to have both an  
edit and a song marker at the same place (but only one of each).

> The keyboard shortcuts went away, because with Gnome (at least), you  
> can
> customize those, I haven't tried it in a while, so I've forgotten the  
> magic
> incantation, but will check on it.  I think it was something simple  
> like highlighting
> the menu item and then just pressing the shortcut key you wanted to  
> apply.

That's what I thought it was too, but it doesn't seem to work - neither  
in gwc nor in the current version of balsa.  I wonder if this has  
changed in gnome2?  I've looked around but haven't yet found any  
mention of a change.

-- Stewart

Re: [Gwc-general] markers

[Jeff W. <we...@ha...>]

Stewart,

You've raised some valid concerns about the markers:

1) It shouldn't be possible to put a marker (edit or song) in the same place
2) Song markers should be deleted if on the edge of a selection

The keyboard shortcuts went away, because with Gnome (at least), you can
customize those, I haven't tried it in a while, so I've forgotten the magic
incantation, but will check on it.  I think it was something simple like 
highlighting
the menu item and then just pressing the shortcut key you wanted to apply.

Thanks for the feedback.
jw

Stewart Evans wrote:

> I recently started using version 0.20.3 and I have to say I prefer 
> the  old way the markers worked.  I had a couple of problems using the 
> new  ones, one stemming from the fact that I put in editing markers 
> through  the file first (which I like for the snap-to feature) and 
> then placed  song markers over them.  There doesn't appear to be any 
> protection  against putting multiple song markers at the same spot, 
> which gave me a  TOC file with several 0-length tracks.  And, when 
> you're placing song  markers over existing editing markers, it's very 
> hard to see what's  there.
>
> Also, the 'delete song markers' function only appears to work when 
> the  marker is within the selection, not on the border of it - which 
> means  that 'add song marker' followed by an immediate 'delete' 
> doesn't delete  the one you just added.
>
> A lack of keyboard shortcuts for the song marker functions is a big  
> problem for me. (Is there an easy way to customize those?)
>
> Also on this version I'm seeing some display funkiness where the 'now  
> playing' line suddenly jumps to the left in mid-play.  That is, it'll  
> be moving along through my selection as it's playing, then jump  
> somewhere earlier in my selection, or outside the selection entirely,  
> then keep moving from there.  This is intermittent and I can't yet  
> identify circumstances to reproduce it.
>
> -- Stewart
>
>
> -------------------------------------------------------
> This SF.Net email is sponsored by Sleepycat Software
> Learn developer strategies Cisco, Motorola, Ericsson & Lucent use to 
> deliver
> higher performing products faster, at low TCO.
> http://www.sleepycat.com/telcomwpreg.php?From=osdnemail3
> _______________________________________________
> Gwc-general mailing list
> Gwc...@li...
> https://lists.sourceforge.net/lists/listinfo/gwc-general

[Gwc-general] crash during declick

[Ken D. <kpd...@mc...>]

I am running Suse 9.0 and GWC 0.19-2 on a pentium 4 computer with 512K of 
memory.

I can successfully do a strong declick on a region containing about 15000 
samples.  If I view a region about twice this size and execute a strong 
declick, then then my machine locks up and eventually GWC crashes.

GWC is really useful for restoring my records but I would really like to 
process larger chunks at a time.

any help is appreciated.

Ken
-- 
Ken Dere

[Gwc-general] markers

[Stewart E. <st...@lu...>]

I recently started using version 0.20.3 and I have to say I prefer the  
old way the markers worked.  I had a couple of problems using the new  
ones, one stemming from the fact that I put in editing markers through  
the file first (which I like for the snap-to feature) and then placed  
song markers over them.  There doesn't appear to be any protection  
against putting multiple song markers at the same spot, which gave me a  
TOC file with several 0-length tracks.  And, when you're placing song  
markers over existing editing markers, it's very hard to see what's  
there.

Also, the 'delete song markers' function only appears to work when the  
marker is within the selection, not on the border of it - which means  
that 'add song marker' followed by an immediate 'delete' doesn't delete  
the one you just added.

A lack of keyboard shortcuts for the song marker functions is a big  
problem for me. (Is there an easy way to customize those?)

Also on this version I'm seeing some display funkiness where the 'now  
playing' line suddenly jumps to the left in mid-play.  That is, it'll  
be moving along through my selection as it's playing, then jump  
somewhere earlier in my selection, or outside the selection entirely,  
then keep moving from there.  This is intermittent and I can't yet  
identify circumstances to reproduce it.

-- Stewart

Re: [Gwc-general] correlative noise reduction function for mono records?

[James T. <ja...@ta...>]

On Thu, 22 Apr 2004 09:54:52 -0500
David Black <da...@ja...> wrote:

> Here's a noise reduction idea I'm toying with, and plan to write some 
> sample code in the next week or so.
> 
> On a particularly noisy monophonic record, played with a stereo 
> cartridge and listened to on headphones, I can hear that a lot of the 
> noise is "stereo", i.e.., not exactly the same in both channels.  The 
> desired mono signal though, is in phase and roughly equal in amplitude 
> between channels.
> 
> Seems to be it'd be possible to obtain several dB of "free" noise 
> reduction (no aural side effects) from a mono record, by using that 
> stereo information to decorrelate information that isn't equally present
> 
> in both channels.   I can think of several algorithmic ways to approach 
> this, one of the simplest being to go through the stereo file sample by 
> sample and convert it to mono by taking whichever L/R sample has the 
> lowest amplitude.   Another option would be to let the correlation 
> determine amplitude, e.g., the more the L/R samples differ, the lower 
> output amplitude to use.  Methinks a well tuned algorithm could produce 
> very nice results.
> 
> This would not help scratches or other noise present in phase and 
> equally between channels.
> 
> My motivation for looking at something like this is because the existing
> 
> noise reduction methods in GWC are effective, but in tough cases can 
> color the sound - for instance by smearing transients except with very 
> small FFT window sizes (which have their own sonic problems).  Any way 
> to leverage information already there to make it possible to use less 
> aggressive settings for the more powerful NR algorithms seems
> worthwhile.

I forget the details, but I did something like that a few years back for
gramofile for just the same reason that in headphones the sound from 78's
was everywhere but the noise was floating around (a bit like a cloud of
midges). I think I did the gating of the Kasparis-Lane algorithm on the
difference of the channels, declicked the 2 channels separately and then
did a simple downmix.

One problem of switching channels is that it is possible to introduce
discontinuities due to low frequency asymmetries (caused by any warping or
off-centring of the disc -- both of which tend to be present on 78's).

James

-- 
James Tappin,             O__      "I forget the punishment for using
ja...@ta...       --  \/`    Microsoft --- Something lingering
http://www.tappin.me.uk/            with data loss in it I fancy"  

[Gwc-general] correlative noise reduction function for mono records?

[David B. <da...@ja...>]

Here's a noise reduction idea I'm toying with, and plan to write some 
sample code in the next week or so.

On a particularly noisy monophonic record, played with a stereo 
cartridge and listened to on headphones, I can hear that a lot of the 
noise is "stereo", i.e.., not exactly the same in both channels.  The 
desired mono signal though, is in phase and roughly equal in amplitude 
between channels.

Seems to be it'd be possible to obtain several dB of "free" noise 
reduction (no aural side effects) from a mono record, by using that 
stereo information to decorrelate information that isn't equally present 
in both channels.   I can think of several algorithmic ways to approach 
this, one of the simplest being to go through the stereo file sample by 
sample and convert it to mono by taking whichever L/R sample has the 
lowest amplitude.   Another option would be to let the correlation 
determine amplitude, e.g., the more the L/R samples differ, the lower 
output amplitude to use.  Methinks a well tuned algorithm could produce 
very nice results.

This would not help scratches or other noise present in phase and 
equally between channels.

My motivation for looking at something like this is because the existing 
noise reduction methods in GWC are effective, but in tough cases can 
color the sound - for instance by smearing transients except with very 
small FFT window sizes (which have their own sonic problems).  Any way 
to leverage information already there to make it possible to use less 
aggressive settings for the more powerful NR algorithms seems worthwhile.

Dave

Re: [Gwc-general] restoration of dynamic range in vinyl recordings?

[David B. <da...@ja...>]

Jeff Welty wrote:

> Do you think a multipling the decible level by a linear factor would 
> be enough?  i.e. convert a sample
> to decibles, multiply by "X", and then convert back to digital.

Since you ask, the Cool Edit 2000/Pro interface for doing that is nice.

There's a graph with X and Y axes - input and output levels in dB 
respectively.  A "flat" dynamic response is a straight line with 
slope=1.  Clicking on the line creates additional points which divide 
the line and can move to change the amplitude transfer function.   There 
might be some other stuff having to do with action in particular 
frequency bands but I might be thinking of some other tool in CE2K.

I suppose a simple list of X, Y "points" specifying what output level 
should correspond to a particular input level would be sufficient to 
specify what the above GUI is doing.  

Dave

Re: [Gwc-general] restoration of dynamic range in vinyl recordings?

[Jeff W. <we...@ha...>]

I'm pretty sure we can do this with GWC, and it will be a trivial 
exercise from the coding point of view.
I believe a nonlinear amplification (attenuation really) is in order.  I 
think this feature would fit into
GWC's goal of getting audio restored.  I think folks would be amazed how 
low end *my* soundcard
is, and so I'm always willing to explore software solutions that require 
not additional expenditures. ;-)

Do you think a multipling the decible level by a linear factor would be 
enough?  i.e. convert a sample
to decibles, multiply by "X", and then convert back to digital.

jw

David Black wrote:

> James-
>
> Can't remember exactly, but it's fairly low end "Allegro".  I use it 
> because it has a better SNR on the input than the Creative SBlive! it 
> replaced, by 5-10 dB or so.
>
> I am old enough to at one time have had just vinyl in my music 
> collection, and thought they sounded pretty good back then.  But 
> alongside CDs, I really hear the difference.  I was listening to the 
> analog output of the turntable/preamp, could hear it and see a curious 
> "brick wall" max level on the VU meters.  This with several 
> pop/rock/fusion records produced in the early 80s.
>
> Regarding my card: I have run tests on the A/D portion for distortion, 
> freq. response and linearity.  It's far from perfect but definitely 
> not responsible for much of the hard compression I could see.   It 
> does show some mild compression at the last 2 dB or so before the 
> digital "0 VU" mark but not enough to explain the above.
>
> With all the great stuff we can do these days using DSP in a 
> general-purpose computer, I am just trying to make the most of those 
> old records that still sound good but with a little computational 
> help, can sound even better.
>
> Dave
>
> James Tappin wrote:
>
>> What sound card do you have? I recall having a similar sort of thing 
>> with
>> a Trident-based Hoontech card, where anything that went above about 
>> +/-15k
>> ADU's was squashed out so that it was virtually impossible to get a true
>> saturated sample. Whereas with the Envy24 based card I now use it just
>> hits the buffers at full speed.
>>
>> James
>>
>>  
>>
>
>
> -------------------------------------------------------
> This SF.Net email is sponsored by: IBM Linux Tutorials
> Free Linux tutorial presented by Daniel Robbins, President and CEO of
> GenToo technologies. Learn everything from fundamentals to system
> administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click
> _______________________________________________
> Gwc-general mailing list
> Gwc...@li...
> https://lists.sourceforge.net/lists/listinfo/gwc-general