alsa-project/alsa-ucm-conf issue #192 was opened from acepukas:

Since the recent update to 1.2.7.2, the Behringer UMC204HD "Default" profile has crackling audio through "Line A" and "Line B" ports. Switching to the "Direct" profile allows for clean audio but it's output over 4 speakers (front left and right, rear left and right). Not really sure how to trouble shoot this.

Issue URL : https://github.com/alsa-project/alsa-ucm-conf/issues/192 Repository URL: https://github.com/alsa-project/alsa-ucm-conf