ShomerShabbos
Member
My Digitech Freqout
is great at lower volume but it does not trail off very naturally imo. I'm a lo volume basement hacker but with a bit higher volume (but still in the lo zone) thru a real guitar cab I can get natural real feedback by touching my guitar headstock to the top or side of the cab while holding a note.
I have small satellite board in front of my FM9T that includes the Freq Out for this exact purpose. It does an ok job.