Who wrote Linux Audio Dev?
pehr anderson
pehr at pehr.net
Wed Sep 20 01:29:24 EDT 2000
Dear Aaron,
I am using the pyesd library to add
interactive audio to my apps under linux.
It has worked very well for me so far.
I really like the pyesd interface and would
absolutely love it if we could turn that into
the de-facto cross-platform audio interface for python.
I'm sure some enterprising young windows hacker could
create a shim layer that would make the windows code
do the same thing.
http://www.users.cloud9.net/~proteus/pyesd/welcome.html
I also use the Festival speech synthesizer
but it doesn't sound as good as a human being ;)
Here is some example code of how I use pyesd if available,
othewise calling the esd shell routines and taking
a performance hit.
#
#NOTE: My example code here is not generalized!
#It assumes that .WAV files have a specific set of paramters.
#
try:
# esd is provided by pyesd, which is a separate RPM file
import esd,wave
class Esound:
""" If pyesd is installed, we can use the esdclient library
to make playback faster
"""
cache = {}
def __init__(self):
""" Start the Esound Daemon """
errcode = os.system("esd >& /dev/null &")
self.s = esd.ServerSession()
def play(self, soundfile):
name = string.replace(soundfile,"/","-")
name = string.replace(name,".","-")
if self.cache.has_key(name):
self.s.playSample(name)
else:
w = wave.open(soundfile,"r")
audio = w.readframes(100000)
sample = esd.Sample(esd.ESD_PLAY | esd.ESD_BITS16 |
esd.ESD_MONO,
esd.ESD_DEFAULT_RATE, audio)
self.cache[name] = self.s.cacheSample(sample,name)
self.s.playSample(name)
except ImportError:
# This should work, rain or shine
class Esound:
def __init__(self):
""" Start the Esound Daemon """
errcode = os.system("esd >& /dev/null &")
def play(self, soundfile):
os.system("esdplay %s >& /dev/null" % soundfile)
Aaron Berg wrote:
>
> I have a very important question. Who wrote linuxaudiodev??? First off
> it doesn's seem to work. Secondly there is no documentation. Please
> prove me wrong! :-)
>
> Anyways I would like to try using this module to do some sound work in
> linux. If anyone knows how it works or where I can find some
> documentation let me know. I am also willing to try document it or get
> it working 100% since I need both anyways. Thanks,
> Aaron C. Berg
>
> Aaron.Berg at mnsu.edu
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