Thanks for the advice Noel. I have been using the harmonizer for a while and am familiar with its control. This didn't happen until I applied "simplified RT" update. Strange, as I don't think the update would change any harmonizer settings.

@Mac: I don't think it the Focusrite's settings. The box automagically adjusts to the input application's settings.

It may have something to do with the stereo settings. My vocal is recording to the right channel. When BIAB converts the track to mono, all is well. Does the harmonizer require a mono setting?