I connected an SQ-5 up to Logic Pro X (10.4.8) running on OS X Catalina (10.15.4), it almost works, but getting a few strange anomalies. Fader assigned to MIDI Channel 8 will move Fader assigned to MIDI Channel 1 and the Output fader on the DAW at the same time. I can move the Output fader on the DAW or the SQ and it moves independently. I can move the fader on the SQ or DAW for Channel 1 and it moves independently. I can move the fader for channel 8 on the DAW and it moves independent, but if I move the fader for channel 8 on the SQ then it moves channel 1 and Output fader. Also moving channel 4 fader causes PAFL to activate on channel 1 and there is some other random PAFL assignment being made that
I haven’t identified. I suspect this has more to do with the DAW configuration than with the SQ as the SQ MIDI implementation seems pretty straight forward. I sent a note to A&H for tech assist and they said that Logic Pro X is not one of the DAWs they test. A bit surprised by that as I think they may have meant Logic Pro X on Catalina, since the instruction in the DAW-Control-Help document list Mojave and Apple Logic.