Sorry, I can't reproduce the problem. I loaded EZK1 on Piano track (3) with midi content. I could select any of the EZK pianos and it would keep and play what ever I set. No switching going on. Tell me what "restart" is? I could play, stop, replay, stop, regenerate, play and all stayed as it should. However, when I closed BIAB and reopened, it no longer had EZK saved. It had returned to my default midi synth. Is that your problem?? Because it is a new problem. I have BIAB2024 v1108 (newest beta).

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BIAB – 2025, Reaper (current), i7-12700F Processor, 32GB DDR4-3200MHz RAM, Motu Audio Express 6x6 - My SoundCloud (Tip: No need to create a SC account to hear music - just hit ESC ).