I think it is happens because need to be routed the Outputs from
MENU/OUTPUT ASSIGN/OUT 3&4.
By using the CURSOR buttons you can select
the source one by one, and set the output destination,
choosing from Main Stereo or Main + 3&4.
I have not here my Audya to try but, you try it...
Maybe it is correct...
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Style Producer
Ketron Event, Ketron Audya 76, Audya 5, SD9, SD1,Yamaha Genos, Korg Pa3x, microarranger, Roland Fantom G6, V-Synth XT, XV-5080, SH201, D-50, Novation KS4, Dave Smith Evolver