RobH - Are you running build 610? There was an issue in 609 where certain synths didn't produce sound. That might be your problem with not hearing it.

Quote:
Summary of changes for build 610 (Dec 28, 2018)
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Fixed: Some VST plugins were silent (eg. SampleTank 3).
Fixed: Some ASIO drivers might not work. Note that the bug can cause the driver to remain open after using Band-in-a-Box, so this bug fix might require you to restart your computer.
Fixed: The drop station would not allow M4A export (highlights red) if QuickTime is not installed. This should only be necessary for Windows Vista or XP.
Fixed: The Find File dialog was not displaying folders, and not loading the song chosen.
Fixed: If there is a RealTrack on the Drums track, Band-in-a-Box might crash when rendering a region of bars.
Fixed: Opening a song file from Windows Explorer would not work if Band-in-a-Box was already open.
Fixed: (for the VST DAW Plugin) Generating multi-riffs would sometimes generate an error. (tips: make sure to first select a multi-riff before generating. Also, highlight a region of the chordsheet first to generate just that section as a multi-riff)
Added: (for the VST DAW Plugin) Shots, holds, rests, push chords now read in from BB files.





John

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