On Sun, Feb 07, 2010 at 08:03:36PM +0100, Lorenzo wrote:
>
> >>>> The note to be sent should be specifiable on command line, along with
> >>>> length/velocity ... probably would be enough.
> >>>>
> >>>> Any ideas?
> >>>>
> >>> As an example, here is a bash script that can be used with cron, to play
> >>> hourly a tune and some strokes.
> >>>
> >> Thanks Pedro, that's quite useful.
> >>
> >> I'm using the playnote function from your script. I see you make a
> >> translation of note names to other ascii chars using tr (before you call
> >> playnote), and it's this latter "scale" string I'm interested in, as
> >> my script does not need to deal with note names at this stage.
> >>
> >> I've used an expansion of the string "<>@ACEGHJLMOQS" to
> >> "<>@ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" which does
> >>
> > This translation requires a bit of explanation. The first set of characters
> > ("cdefgabCDEFGAB") are two octaves, the lower one represented by the
> > symbols "cdefgab" and the upper one by the symbols "CDEFGAB". The two sets
> > are note names used in the tune, declared at the top:
> >
> > tune="C 4, E 4, D 4, g 2, C 4, D 4, E 4, C 2, \
> > E 4, C 4, D 4, g 2, g 4, D 4, E 4, C 2,"
> >
> > But the MIDI devices expect MIDI note numbers instead of symbolic names, so a
> > translation is needed. The symbol "c" is translated into the character "<"
> > (character code 0x3C, decimal 60), and the symbol "C" into the character "H"
> > (code 0x48, decimal 72). The character codes are the MIDI note numbers, and
> > we are writting them to character devices (/dev/midi*).
> >
> > The MIDI note numbers and their corresponding musical notes can be seen in
> > this nice graphic:
> > http://en.wikipedia.org/wiki/File:NoteNamesFrequenciesAndMidiNumbers.svg
> >
> > If you don't need to deal with note names, I suggest you to use the MIDI note
> > numbers directly. This gives you the widest possible range of notes.
> >
> >
> >> give me a wider range of notes, but is very middly, there's no bass
> >> notes nor anything from the high octaves.
> >>
> >> How might I get the bass and high end?
> >>
> > Another example is attached. In this case, the script plays a more complex
> > tune for two voices codified without using symbolic note names. Using this
> > technique you can even specify different velocities for each note (although
> > this example uses 0x64, dec.100 for all notes). The sample also uses running
> > status and knows how to cope with silences.
> >
> > Regards,
> > Pedro
> >
> Another completely different approach might be to create a Pd patch with
> all the 'random midi logic' and then call it from bash with the -nogui
> option... But not sure if this would fit in your scenario...
>
I used this little script Thursday night to drop some random samples in during stops in a song. First time I've busted out tapeutape live too. It went over pretty well.
Two sets of samples, triggered by two different pads on the Novation.
-ken
---------------
#!/usr/bin/python
import os,sys
import random
import alsaseq
import alsamidi
sys.path.append('/home/music-projects/lib')
import alsaevent
alsaseq.client('randomsamples', 1, 1, False)
def main_loop():
while True:
msg=alsaseq.input()
if msg:
ev=alsaevent.AlsaEv(*msg)
if ev.type == alsaseq.SND_SEQ_EVENT_NOTEON:
if ev.notenum == 36:
alsaseq.output(alsamidi.noteonevent(0, random.randint(0,24), ev.vel))
elif ev.notenum == 38:
alsaseq.output(alsamidi.noteonevent(0, 30+random.randint(0,28), ev.vel))
#### MAIN
if __name__ == '__main__':
main_loop()
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