Created attachment 90729 [details] Output alsa-info.sh Recording directly with arecord works, but using pulseaudio (skype, audacity) has crackling noise. Workaround is to disable timer based scheduling in /etc/pulse/default.pa AND setting default-fragments = 4 default-fragment-size-msec = 90 (or higher, lower still produces noise) in daemon.conf. Total hw buffer size is 371 ms (according to pulseaudio -vvv > pulse.log) Using parecord funnilly works.
Additional info can be found here (bug first reported to launchpad): https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1259070
This bug still affects me in Ubuntu 17.10 when speking by Steam and recoring audio.
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