I have created a project as a tutorial for myself, and I deleted all the tracks when I ran into this issue, where Parawave Rapid is playing too quietly and making glitching (very minor) sounds instead of responding to my simple held MIDI key. But even if I added a fresh Parawave Rapid into the same project (after removing every track) and loaded any of it's presets I continued to get this strange behavior. So I basically ran out of things that I understood. All the other synths were working fine, and Rapid wasn't using any additional CPU compared to them. And Rapid loads fine in a fresh Studio One project, but loading it into THIS project with a fresh rebooting doesn't eliminate the issue, so I think it could be some configuration issue that happened in Studio One. But I think it's not track routing related because deleting all tracks didn't resolve it. When I reloaded Rapid into that Project it behaved the same - it was only axing the Studio One project and going fresh that restored things to normal functioning. (Sorry if I'm repeating myself over and over.)
The initial project was a test of Scaler 2 into Mai Tai and all worked as expected. I then was trying out some other synths, including BX Oberhausen and Rapid. Bx Oberhausen acting normally.
At first I thought Rapid was acting normally as well. But the strange glitching continued so I became aware that this was not part of the preset. I closed Studio One, and loaded Rapid, and that Rapid preset, into FL Studio. All normal. Then I loaded them into Studio One, fresh. All normal. So Then I opened that original project where I had the issue, and removed every thing. Then I added Rapid. (By itself). Same issue.
Mystery to me. Had it not just been a test it would be time consuming because I basically lost that entire project if I wanted to work with Rapid in it. So this is disconcerting to not have a handle on what's going on.