My own solution for this setup, given that Reaper midi latency is unacceptable:
1) Reaper->midi out-->midi merger->sound module
2) Keyboard midi out->midi merger
3) Sound module midi out->midi in->Reaper
4) Sound module L/R audio output => 2 audio interface inputs
The midi merger is a box with several midi inputs and only one output.
Line 1: Allows sending Bank & Program changes, Sysex and midi notes from Reaper to the Sound module
Line 2: Allows using keyboard to play the Sound module with no latency.
Line 3: Allows recording keyboard midi, as echoed through the Sound module to its output, and for inputting Sysex messages from the Sound module.
The merge box wouldn't be needed if the keyboard could combine midi input data and keyboard messages into its single midi output, but its an old Korg DW8000 from the '80s, so it isn't smart enough to pull that off...
Last edited by Philbo King; 11-19-2019 at 10:03 AM.
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