[Sndobj-devel] Triggered Wav File playback in Python

[Craig L. <lew...@mi...>]

Anyone have advice on the best route to creating triggered file
playback?    I'd like to have my program be able to start the playback
of a wav file when a flag is set, and then cease playback of that file
once the flag is reset.  i want this to happen in a thread, though,
because there will be other processing (and sounds) taking place (such
as a metronome) while the file is playing back.  also, the length of
playback will vary depending on when the flag is reset (which is
controlled by user input)

i'm using SndWave, and patching both channels into SndIn objects.
everything is then added to a SndThread:
----------------------
wavfile = sndobj.SndWave('C261.wav', 3, 2,16)
wavsoundR = sndobj.SndIn(wavfile,1)
wavsoundL = sndobj.SndIn(wavfile,2)
outp = sndobj.SndRTIO(2, sndobj.SND_OUTPUT)
outp.SetOutput(2, wavsoundR)
outp.SetOutput(1, wavsoundL)

IT = sndobj.SndThread()
IT.AddObj(wavfile,sndobj.SNDIO_IN)
IT.AddObj(wavsoundR)
IT.AddObj(wavsoundL)
IT.AddObj(outp, sndobj.SNDIO_OUT)

IT.ProcOn()
time.sleep(5)
IT.ProcOff()
-----------------------------------

I thought about just turning the thread on and off, but when the
thread is turned on again after being turned off, it just resumes
processing where it left off.  is there a way i can get it to resume
from the beginnig of the wav file?


thanks,
craig