Mountain Lion + A4 + Beta = 
Mountain Lion installed
No problems with Audio 10
Audio 4 without drivers = no sound
Audio 4 with drivers = really bad performance
Tried to different Audio 4 with Vinyl and cd timecode. Same result.
Ah, I thought I was the only one. I was experiencing really weird issues with my control vinyl the other day and thought the SL1200’s had to be taken apart for repair but it appears to be a software thing..