Hi again, On Mittwoch, 8. August 2018 14:26:33 CEST Frank Mehnert wrote: > [...] > > In principle audio forwarding works so I can play files with aplay at vm2 > and the playback at vm1 works. However, there is disturbing noise / crackles > when playing any sound with aplay on vm2. Playing the same sound on vm1 > works with a reasonable quality. Now I repeated a similar setup with only one VM and the alsaloop module. I experience the same sort of disturbing noise with the default settings but when I pass -t 100000 (set latency to 100ms instead of 10ms) the result is much better. In that case alsaloop -v shows that for the playback side a buffer size of 8192 and a period size of 1024 is chosen while on the playback side the buffer size / period size ratio is 17640 / 2205. A few more experiments with my own capture/playback applications show that using a buffer size of 8192 frames and a period size of 1024 frames on both sides (capture and playback) seem to be sensible values on this hardware while 8192/2048 sounds worse. Any comment on this? Also, is there any way to determine sensible values for buffer size / period size from /sys or /proc/asound? Also I don't understand the relationship between buffer size and period size between the capture side and the playback side. Thanks, Frank ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
