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Hello! I would like to pose a possible setup to the more experienced pa700 owners in the forum:

My church has a pipe organ equipped with a Peterson MIDI I/O and I would like to play and control it via MIDI from the PA700. The Peterson accepts sysex msgs via MIDI control for changing registers and other functions. Is it possible for me to create keyboard sets that can do this? Or would I be better off using my Nektar P61 or FCB1010, or some combination to do this?

Ideally, I would like to create keysets or Songbook entries to control the organ by selecting one of the Upper1-4, which would choose an organ registration by sysex and activate a PA700 sound and be able to switch and/or mix the sounds in any combination. I’ll be using CME wireless MIDI to connect the two instruments.

One other question: if I am controlling the pipe organ with the PA700, will transposition change the pipe organ as well?

Many thanks for your responses! Jim

jgorin wrote: .. pipe organ equipped with a Peterson MIDI I/O and I would like to play and control it via MIDI from the PA700. The Peterson accepts sysex msgs via MIDI control for changing registers ....

It would be more important to obtain experiences from users of the Petersen Midi I/O module or information about its Midi implementation, because the Midi properties of the Pa700 are clearly documented - it selects the registration of external MIDI devices via program changes.

The Pa700 can control the Petersen I/O module via bank select (MSB, LSB) and program changes via different channels, transmits system real-time messages (master volume, transpose messages, FX settings, quarter tone settings) and sends all required Midi messages (volume, expression) according to the Midi implementation chart.

Creating keyboard sets in songbook allows to decide combined Midi usage of internal or external tracks, but to mix audio sounds of its different sources of course requires a mixer/amplifier.

Everything else is because of how Petersen's I/O processes incoming Midi messages. I can't imagine Petersens is controlling register changes via sysex messages. With its MIDIResourceSystem, the type (MSB or LSB) for bank selection was already switched from software v1.68 using a DIP switch for register selection (without sysexs).
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The Pa700 and also FCB1010 and Nektar are unsuitable as SysEx generators.

Thank you, siebenhirter! You have saved me a lot of "trial and error" time. It is much appreciated! jim