On Thu, 11.12.08 09:56, Baek Chang (baeksan at ccrma.stanford.edu) wrote: > What is the proper way to do volume ramping in pulse audio to avoid clicking > when changed the volume? I wrote a module to callback and change the volume > in small incremental steps, but it seems that pulse seems to apply the > volume changes on the audio buffer as a whole. Does pulseaudio take a > volume command, and then process the one audio buffer with that set volume? > I'm using a buffer size of 4096 at 44100Hz, so it is about 10mS. So how > would I go about ramping the volume, in say about 15 mS? Volumes are applied block-by-block. The Block size is variable and depends on the sound device and the application used. I wrote some code to implement volume "envelopes" for this. The code is there, it's even included in the tarball. But it's not hooked up. And until I finish that I fear, no: we cannot do volume ramping. Sorry, Lennart -- Lennart Poettering Red Hat, Inc. lennart [at] poettering [dot] net ICQ# 11060553 http://0pointer.net/lennart/ GnuPG 0x1A015CC4
