[LAU] sending random midi notes from a bash script

[Gabriel M. Beddingfield]

On Sun, 7 Feb 2010, Philippe Hezaine wrote:

> I'm looking for randomize Note On from a midi file.
> I have two way for sending this file, a standard file generated by
> Lilypond or a text file by midicomp.
> Here is an excert from midicomp file:
>
> 062:00:000 On      ch=10  note=f#3  vol=105
> 063:-1:-576 Off     ch=10  note=f#3  vol=64
> 063:-1:-384 On      ch=10  note=f#3  vol=95
> 063:-1:-192 Off     ch=10  note=f#3  vol=64
> 063:-1:000 On      ch=10  note=f#3  vol=127
> 063:00:-576 Off     ch=10  note=f#3  vol=64
> 068:00:000 On      ch=10  note=f#3  vol=127
> 069:-1:-576 Off     ch=10  note=f#3  vol=64
> 074:00:000 On      ch=10  note=f#3  vol=127
> 074:00:192 Off     ch=10  note=f#3  vol=64
> 074:00:384 On      ch=10  note=f#3  vol=95
> 074:00:576 Off     ch=10  note=f#3  vol=64
> 074:01:000 On      ch=10  note=f#3  vol=105
> 074:01:192 Off     ch=10  note=f#3  vol=64
>
> I'm looking for randomizing the third column: 192 or -576...
> between + or -3 units for instance. ( 000 is a special case)

Try the attached python filter and see how it suits you. 
You can use it in a pipe like this:

    $ cat that-data-quoted-above.txt | python timerander.py

However, if you're tryint to "humanize" the data, you might 
consider replacing the line that has random.randint(min, 
max) with something like:

     c = int(c) + int(random.gauss(0.0, 1.0))

HTH,
Gabriel
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