I just had this problem. It looks like setperiodsize() is more like a request than a command---the value you pass in is the requested value, but the value returned in what the system is actually using. I assume this is the fault of the underlying ALSA API. I did this to figure out what the valid period sizes were:
>>> import alsaaudio as aa >>> capt = aa.PCM(aa.PCM_CAPTURE) >>> capt.setchannels(1) >>> capt.setrate(44100) >>> for n in range(1, 16385): >>> if capt.setperiodsize(n) == n: >>> print n On my system, this printed: 192 224 256 320 384 448 512 640 768 896 1024 1280 1536 1792 2048 2560 3072 3584 4096 5120 6144 7168 8192 10240 12288 14336 16384 Attempting to set any other period size resulting in 16384 being actually selected. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/189663 Title: setperiodsize does not work in python-alsaaudio To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pyalsaaudio/+bug/189663/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
