Re: [xwax-devel] High-resolution CD timecode: my experience

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I got it working a few weeks ago and DJ'd a house party with it. I never got
around to posting my findings, but here are my thoughts:

It's definitely more accurate when starting, stopping, looping, and
vinyl-mode cueing. Manipulating the CDJ in vinyl mode, however, yields
inconsistent results. If the deck is moved too quickly, it gets jumpy.

Stuttering is improved, but the wobbling resulting from starting and
stopping a track from positions nearly adjacent to each other in the song
still creates a slight pitch bend during track resume.

I appear to have some noise or even damage in my audio device (a U46DJ). The
deck signal indicators do not show concentric circles (will post screenshot
later). The timecode position indicators in the UI (numeric value) appear
and disappear many times a second, though playback is correctly tracked most
of the time. At precisely +0.65% pitch will mis-read the timecode; xwax
jumps around the track many times a second and eventually disables vinyl
control on that deck.

Perhaps the tolerances required to interpret a 4000hz timecode consistently
are a bit too low for my beater of an audio interface to handle. Seems to
otherwise work marvelously. Will generate a lower-frequency version of the
code and try again.

Qifan.

On Tue, Jul 12, 2011 at 12:46 PM, Tom Bonnarens <tom...@ho...>wrote:

>  Hi all,
>
> I've got it working.
> Copied the source files I modified from the fresh ubuntu studio install to
> the 8.4 release running on my old laptop.
> This seemed to work as expected. I started xwax with one deck using the
> serato cd and the other one with the high resolution cd.
> My findings:
> -It feels more accurate for sure! Really noticable with looping, with the
> serato I have to correct my loops to get a clean result wereas with the new
> cd it is less necessary.
> -Stuttering is more useable though it is still possible to get the wobly
> sound effect when you stutter heavily.
> -Normal scratching is ok but heavy scratching makes xwax go crazy, also a
> backspin makes the track play really fast. This is not the case with the
> serato cd.
>
> I'm using pioneer CDJ-800 MK2 players and run xwax on an 1.4 ghz centrino
> with 1gb ram combined with maya44.
>
> Regards,
> Tom
>
> Ps: I ended up with wav file of +- 180mb.
> If somebody is interested i could upload an iso of the cd to a filehost and
> provide my modified xwax files for others to test.
>
> ------------------------------
> From: tom...@ho...
> To: int...@ho...
> Date: Tue, 12 Jul 2011 14:19:09 +0200
> CC: xwa...@li...
> Subject: Re: [xwax-devel] High-resolution CD timecode (experimental)
>
>  Hi Guys,
>
> I've managed to create a wav file and burn a test cd.
> I've modified timecoder.c and recompiled, when starting xwax it says it
> cannot find my timecode definition.
> Apparently it is not picking up my file changes since it tried to change
> the titlebar and it didn't change either.
> When opening the file in a text editor the changes are there though.
> I'm probably overlooking something...
>
> Regards,
> Tom
>
> > From: tom...@ho...
> > To: int...@ho...
> > Date: Fri, 1 Jul 2011 22:14:23 +0200
> > CC: xwa...@li...; ma...@po...
> > Subject: Re: [xwax-devel] High-resolution CD timecode (experimental)
> >
> > Hi guys,
> >
> > Thanks for the feedback.
> > I will give it a second try next week...
> >
> > Regards,
> > Tom
> >
> > Sent from my mobile device
> >
> > On 1-jul-2011, at 21:28, "Intamixx Music Company"
> > <int...@ho...> wrote:
> >
> > > Hello Guys,
> > > This is my first attempt at using CDs with Xwax.
> > >
> > > I made a high resolution CD timecode;
> > >
> > > Did the
> > > gcc -o mktimecode mktimecode.c -lm
> > > which worked ok.
> > >
> > > then did
> > > ./mktimecode > data.bin
> > >
> > > This created a large file (around 180mb)
> > >
> > > then did
> > >
> > > sox -t raw -r 44100 -c 2 -w -s data.bin timecode.wav
> > >
> > > (I am using sox 12.18.1 and "sox -t raw -r 44100 -c 2 -e signed -b
> > > 16 data.bin timecode.wav" didn't work for me)
> > >
> > > where
> > > -w = sample datasize (16bits)
> > > -s = signed linear
> > > So I put the CD into a CD player (not a CDJ... I don't have one!)
> > > and Xwax played a song 6 times faster than usual!
> > >
> > > As you mentioned, this timecode CD is only meant for CDJs?
> > >
> > > I put a Serato CD into my player and it played normal speed ok.
> > >
> > > So there you go, thats as far as I got.
> > >
> > > > Date: Sun, 20 Mar 2011 16:18:23 +0000
> > > > From: ma...@po...
> > > > To: tom...@ho...
> > > > CC: xwa...@li...
> > > > Subject: Re: [xwax-devel] High-resolution CD timecode (experimental)
> > > >
> > > > On Sun, 20 Mar 2011, Tom Bonnarens wrote:
> > > >
> > > > > I'm using cdj's but haven't succeeded in creating a file
> > > succesfully.
> > > >
> > > > Thanks Tom, can you post what the problem is? Maybe it is because
> > > of the
> > > > mistake in the previous mail.
> > > >
> > > > > Would like to test though since stuttering now always is quite
> > > wobly...
> > > > > Is anyone able to upload an mp3 or iso file with the timecode
> > > signal?
> > > >
> > > > It would be large, so best if you can generate it rather than
> > > download it.
> > > > Converting to an MP3 is likely to destroy the data in the signal. It
> > > > shouldn't be very hard to use the program to generate it.
> > > >
> > > > Thanks
> > > >
> > > > --
> > > > Mark
> > > >
> > > >
> > > ---
> > > ---
> > > ---
> > > ---------------------------------------------------------------------
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> >
> >
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