Hi Beakybird Larry,

Interesting that you brought this topic up because, being a 3 pedaled footswitch player (on the Tyros) myself (left pedal : fill to self; center pedal: vocal hamony on/off, right pedal: sustain), have explored the possibility of adding a 3rd pedal assignment on the PSR2000. Here are my findings:

Unfortunately, the PSR2000 does not support midi (sysex) for the 'fill to self' feature (PSR2000 data list manual: pages 44-48 does not show support for 'fill to self' ), so the 'fill to self' can only be triggered via dedicated footswitch jacks (1 or 2) .

In light of this, another possibility might be to assign 'vocal harmony on/off' to the Midi Solutions Footswitch Box (midi sysex) and assign 'sustain' & 'fill to self' to the dedicated PSR2000 footswitches. I've discovered that triggering vocal harmony requires two different sysex messages:

Vocal harmony 'ON': F0 43 10 4C 04 00 0C 40 F7
Vocal harmony 'OFF': F0 43 10 4C 04 00 0C 7F F7

The key question now is: will the Midi Solutions Footswitch unit not only trigger the ON sysex message (turning vocal harmony on) but then allow you to turn it OFF, by automatically triggering the 2nd sysex message, the 'next' time you activate its associated footswitch. The Midi Solutions Footswitch unit must allow you to program both above sysex messages to it, and then have each one alternately sent to the PSR2000 , each time the foot switch is activated. I'd be curious to hear if the Midi Solutions Footswitch box supports this or not.

Scott