Is the Realtrack on BIAB's original Melody or Soloist track. These are tracks #6 and #7 (from the top of the mixer). Since the original Melody and Soloist tracks were originally designed for user-input and playable notation, it's possible that the volume control affects the audio as well as the underlying MIDI.

If Guitar 2 is on the original Melody or Soloist track, try moving it to a Utility track and erasing it from its present track. That might be make a difference.


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Audiophile BIAB 2025