None of the audio inputs can be controlled by the swell pedal. (To be honest I can't think of any entertainment organ from any manufacture that does)
Normally most things that are connected to audio inputs, also have Midi, and therefore the volume of them is controlled by cc11. (The standard Midi code for a swell pedal)
The selector Plus for the Pegasus Wing just allows for more voices to be played simultaneously on the manuals.
Bill
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English Riviera:
Live entertainment, Real Ale, Great Scenery, Great Beaches, why would anyone want to live anywhere else (I�m definitely staying put).