Dave, if you are full-in with the Phonaks, your audiologist/fitting technician can create a manual MUSIC program for you. Just have them reduce WhistleStop to zero. That will eliminate the Trill effect. You aids will feedback in the normal situations (hands close to ears, etc), but they sound very good that way. Problem is, when you go back to Autosense 3.0, normal everyday stuff still trills in the higher frequencies.
And to clear it up - looking at the user manuals for Phonakās target software, they donāt do REM within the aids as I was told - itās something they call āReal Ear Testā where they play a range of tones that, I presume, set the comfort levels for Sound Recover, WhistleStop, etc.