Ripple effect sound when releasing sustain pedal

Hi John,
Your "let it be" example (remains a good song..) led me to the root cause.
When having the sustain pedal pressed, notes keep piling up when replayed (you may have noticed an unwanted volume increase).
This ends up in too many (same) notes to be damped when releasing the pedal.
So CPU surely is a factor, but it's significantly increased by missing housekeeping = a bug which also caused artificial volume increase.
I'll investigate what I can do about that and keep you posted.
For now thanks for reporting!