08-07-2017, 11:32 AM -
I found that using the lowlantency-hwe kernel (4.10.0.30.33) in Ubuntu 16.04 had helped to eliminate the audio crackling in RPCS3. When I was using the generic-hwe kernel, I had to start RPCS3 with PULSE_LATENCY_MSEC=30 as a workaround.