Uncle Dave, it's normally that the seq. resets all the not indicated parameters. To avoid this, you need to set up your harmonizer and reverb parameters into each SMF you play back. You can perform this by setting up each parameter values into the midi-track or dumping the Syx-data from Digitech. The second way to keep the Digitech settings unchanged is to turn off the prog&CC changes on your sequencer (not keyboard). In this case, you'll need to adjust the seq's MIDI settings (MIDI-filter etc). Hope this will be helpful.
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