Hi Pete,
Thank you. With all the work that went into this audio file processor, I thought that someone would have addressed this very common issue.
Lots of comm's channels have background noise. Aircraft intercom systems, AM radio, or doing a recording with a beating fan in the background. Everything from high freq hiss to an annoying beat that wasn't noticed during the recording (or thought not to be an issue and it turns out to be one).
I just picked up a couple Teensy 3.2's. Going to grab an audio breakout board, do the workshop and then trying the technique you mentioned. Would be nice if there were some parameters to manipulate the noise file to help it filter.
Anyway, thanks,
Dave