Sorry I keep asking questions but I'm on a different track from everyone else. There may be a quick, easy and no cost solution to your issue as soon as I know where the noise is coming from first.
So, with that in mind,
<< Hi, Charlie. When I do record a song with the Zoom H1, I routinely take it to Audacity and remove all the noise.>>
Are you saying the exact same noise that you hear when a song renders in BIAB is also in a recording you do in the H1?
or
Is the noise you're trying to remove with Audacity after a recording on the H1, room background noise picked up by the H1 microphone during recording?
Lastly,
If you select a Style in BIAB, input some chords or load a style demo, play the 'song', does the song play clearly or is there noise?
If it plays clearly, but you render it to a WAV or MP3, that's when noise is inserted into the rendered version that is output?
Do the pianos that are acting up with both MIDI and RT's act up only with the current Style you've chosen or is every piano, MIDI and RT rendering with noise?
What happens if you Rt click on a piano track and select Track Actions\Save as a WAV file?
What I'm hoping for is that BIAB with no type of input other than the instruments of a Style plays clearly and renders clearly.
If that's the case, I may be able to have you recording a clear song tonight...