Thread: [timidity-talk] timidity destroys initial silence :-(

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timidity-talk

[timidity-talk] timidity destroys initial silence :-(

From: Peter B. <pj...@pj...> - 2014-08-08 02:56:00

Greetings all,

I'm trying to split a .mid file t.mid into separate channels
eg t_cha0.mid t_cha1.mid t_cha4.mid
then convert each of those to wav t_cha0.wav t_cha1.wav t_cha4.wav
so that I can treat them with effects eg using sox
then mix them back together eg using ecasound.

BUT when I convert mid->wav using timidity, eg:
  timidity -Ow -o t_cha1.wav t_cha1.mid
the four seconds of initial silence in t_cha1.mid before the first
note gets suppressed :-( thus destroying the co-ordination between
my files and making mixdown impossible :-(

I've been through  man timidity  and  man timidity.cfg
and there are hundreds of options, but I see nothing to
disable the destruction of the initial silence.

I tried inserting a note_off event into t_cha1.mid just before
the 4-second initial silence, but timidity is 'clever' enough to
ingore it :-(

Does anyone know a timidity option to preserve initial silence ?

I'm on debian stable ...
  TiMidity++ version 2.13.2

Regards,  Peter Billam

http://www.pjb.com.au      pj...@pj...     (03) 6278 9410
"Follow the charge, not the particle."  --  Richard Feynman
 from The Theory of Positrons, Physical Review, 1949

Re: [timidity-talk] timidity destroys initial silence :-(

From: Bob v. d. P. <bo...@me...> - 2014-08-08 03:34:04

Not what you want to hear ... but I don't think so. In my program MMA I
have added a "sync" option just for this reason. It creates a short (one
midi tick) on and then off event at offset 0. I think this is the only way
to do this.


On Thu, Aug 7, 2014 at 7:40 PM, Peter Billam <pj...@pj...> wrote:

> Greetings all,
>
> I'm trying to split a .mid file t.mid into separate channels
> eg t_cha0.mid t_cha1.mid t_cha4.mid
> then convert each of those to wav t_cha0.wav t_cha1.wav t_cha4.wav
> so that I can treat them with effects eg using sox
> then mix them back together eg using ecasound.
>
> BUT when I convert mid->wav using timidity, eg:
>   timidity -Ow -o t_cha1.wav t_cha1.mid
> the four seconds of initial silence in t_cha1.mid before the first
> note gets suppressed :-( thus destroying the co-ordination between
> my files and making mixdown impossible :-(
>
> I've been through  man timidity  and  man timidity.cfg
> and there are hundreds of options, but I see nothing to
> disable the destruction of the initial silence.
>
> I tried inserting a note_off event into t_cha1.mid just before
> the 4-second initial silence, but timidity is 'clever' enough to
> ingore it :-(
>
> Does anyone know a timidity option to preserve initial silence ?
>
> I'm on debian stable ...
>   TiMidity++ version 2.13.2
>
> Regards,  Peter Billam
>
> http://www.pjb.com.au      pj...@pj...     (03) 6278 9410
> "Follow the charge, not the particle."  --  Richard Feynman
>  from The Theory of Positrons, Physical Review, 1949
>
>
>
> ------------------------------------------------------------------------------
> Want fast and easy access to all the code in your enterprise? Index and
> search up to 200,000 lines of code with a free copy of Black Duck
> Code Sight - the same software that powers the world's largest code
> search on Ohloh, the Black Duck Open Hub! Try it now.
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> _______________________________________________
> Timidity-talk mailing list
> Tim...@li...
> https://lists.sourceforge.net/lists/listinfo/timidity-talk
>



-- 
**** Listen to my FREE CD at http://www.mellowood.ca/music/cedars ****
Bob van der Poel ** Wynndel, British Columbia, CANADA **
EMAIL: bo...@me...
WWW:   http://www.mellowood.ca

Re: [timidity-talk] timidity destroys initial silence :-(

From: TAMUKI S. <ta...@li...> - 2014-08-08 05:59:38

Hello,

From: "Peter Billam" <pj...@pj...>
Subject: [timidity-talk] timidity destroys initial silence :-(
Date: Fri, 8 Aug 2014 12:40 +1000

> I'm trying to split a .mid file t.mid into separate channels
> eg t_cha0.mid t_cha1.mid t_cha4.mid
> then convert each of those to wav t_cha0.wav t_cha1.wav t_cha4.wav
> so that I can treat them with effects eg using sox
> then mix them back together eg using ecasound.

First, you do not have to split a midi file into separate channels.
You can convert each of those to wave files using -Q option.

> BUT when I convert mid->wav using timidity, eg:
>   timidity -Ow -o t_cha1.wav t_cha1.mid
> the four seconds of initial silence in t_cha1.mid before the first
> note gets suppressed :-( thus destroying the co-ordination between
> my files and making mixdown impossible :-(
> 
> I've been through  man timidity  and  man timidity.cfg
> and there are hundreds of options, but I see nothing to
> disable the destruction of the initial silence.
> 
> I tried inserting a note_off event into t_cha1.mid just before
> the 4-second initial silence, but timidity is 'clever' enough to
> ingore it :-(
> 
> Does anyone know a timidity option to preserve initial silence ?

To avoid skipping initial silence, you can try to add a dummy track
which contains only one midi note on and off event at offset zero.

Here is the sample script.  In this case, the dummy track is assigned
to channel 32, which is not used.

----------------------------------------------------------------------
#!/bin/sh

# add a dummy track
mf2t -ntv kkr8p.mid kkr8p.txt
cp -p kkr8p.txt kkr8p_dummy.txt
sed -i '/^MFile/s/22/23/' kkr8p_dummy.txt
cat <<- "EOF" >> kkr8p_dummy.txt
	MTrk
	0:-1:0 Meta TrkName ""
	0:-1:0 Meta 0x21 01
	2:-1:-2 On ch=16 note=c5 vol=64
	2:0:-2 On ch=16 note=c5 vol=0
	TrkEnd
	EOF
t2mf kkr8p_dummy.txt kkr8p_dummy.mid

# make wav (melody)
timidity -idt -Q0,-1,-5,-11,-12,-17,-20 -Ow -o kkr8p1.wav kkr8p_dummy.mid
# make wav (harmony)
timidity -idt -Q1,5,9,10,11,12,17,20,32 -Ow -o kkr8p2.wav kkr8p_dummy.mid
# make wav (percussion)
timidity -idt -Q0,-9,-10,-32            -Ow -o kkr8p3.wav kkr8p_dummy.mid

# mix them
sox -m kkr8p1.wav kkr8p2.wav kkr8p3.wav kkr8p.wav
----------------------------------------------------------------------

Regards,
TAMUKI Shoichi

Re: [timidity-talk] timidity destroys initial silence :-(

From: Yair K. <ce...@gm...> - 2014-08-08 09:48:15

<html style="direction: ltr;">
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    <meta content="text/html; charset=windows-1252"
      http-equiv="Content-Type">
    <style type="text/css">body p { margin-bottom: 0cm; margin-top: 0pt; } </style>
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    bidimailui-detected-decoding-type="latin-charset" bgcolor="#FFFFFF"
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    <div class="moz-cite-prefix">On 08/08/2014 05:40 AM, Peter Billam
      wrote:<br>
    </div>
    <blockquote cite="mid:3a2b83$sn...@ip..."
      type="cite">
      <pre wrap="">Greetings all,

I'm trying to split a .mid file t.mid into separate channels
eg t_cha0.mid t_cha1.mid t_cha4.mid
then convert each of those to wav t_cha0.wav t_cha1.wav t_cha4.wav
so that I can treat them with effects eg using sox
then mix them back together eg using ecasound.

BUT when I convert mid-&gt;wav using timidity, eg:
  timidity -Ow -o t_cha1.wav t_cha1.mid
the four seconds of initial silence in t_cha1.mid before the first
note gets suppressed :-( thus destroying the co-ordination between
my files and making mixdown impossible :-(

I've been through  man timidity  and  man timidity.cfg
and there are hundreds of options, but I see nothing to
disable the destruction of the initial silence.

I tried inserting a note_off event into t_cha1.mid just before
the 4-second initial silence, but timidity is 'clever' enough to
ingore it :-(

Does anyone know a timidity option to preserve initial silence ?

I'm on debian stable ...
  TiMidity++ version 2.13.2

Regards,  Peter Billam

<a class="moz-txt-link-freetext" href="http://www.pjb.com.au">http://www.pjb.com.au</a>      <a class="moz-txt-link-abbreviated" href="mailto:pj...@pj...">pj...@pj...</a>     (03) 6278 9410
"Follow the charge, not the particle."  --  Richard Feynman
 from The Theory of Positrons, Physical Review, 1949


------------------------------------------------------------------------------
Want fast and easy access to all the code in your enterprise? Index and
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Code Sight - the same software that powers the world's largest code
search on Ohloh, the Black Duck Open Hub! Try it now.
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</pre>
    </blockquote>
    <br>
    There's an option for this:<br>
    <br>
                 --preserve-silence<br>
                   Do not drop initial silence.  Default: drop initial
    silence<br>
    <br>
  </body>
</html>

Re: [timidity-talk] timidity destroys initial silence :-(

From: Yair K. <ce...@gm...> - 2014-08-08 09:59:57

<html style="direction: ltr;">
  <head>
    <meta content="text/html; charset=windows-1252"
      http-equiv="Content-Type">
    <style type="text/css">body p { margin-bottom: 0cm; margin-top: 0pt; } </style>
  </head>
  <body style="direction: ltr;"
    bidimailui-detected-decoding-type="latin-charset" bgcolor="#FFFFFF"
    text="#000000">
    <div class="moz-cite-prefix">On 08/08/2014 12:50 PM, Yair K. wrote:<br>
    </div>
    <blockquote cite="mid:53E...@gm..." type="cite">
      <meta content="text/html; charset=windows-1252"
        http-equiv="Content-Type">
      <style type="text/css">body p { margin-bottom: 0cm; margin-top: 0pt; }</style>There's
      an option for this:<br>
      <br>
                   --preserve-silence<br>
                     Do not drop initial silence.  Default: drop initial
      silence<br>
      <br>
    </blockquote>
    <br>
    Oh, right, that's in 2.14.0. 2.13.2 didn't have this. You can get
    the patch from the list and apply it, or build that version
    yourself.<br>
  </body>
</html>