They are aware of the 2 and 4 channel not-recording bug.
Regarding bit crushed audio, forgive me if you are aware of this, but if you have the speed of that channel set to something other than standard speed, the recording will be at a different speed (can sound bit crushed if you record while set to higher speed then set playback to standard speed).
Also, one of the developers mentioned they are working to clean up the audio so it isn’t as bitcrushed…but I like it and think it would be cool if they gave us a clean and more bit crushed option in the parameters!