Good morning. I’m working on playing some Bach, and this year’s piece (Invention N° 4 in D minor) requires playing a few notes below my chosen instrument’s range (A five-string EUB tuned EADGC). These notes are infrequent and for emphasis, I hit C1 twice and finish on D1. I wonder if a detuning/octaver pedal will track low enough. I do not need to play for an extended period detuned, it would be enough to have a pedal I can use to hit the note momentarily. I am aware that there are non-effects solutions to this problem, like using BEADG tuning and playing the higher notes up the neck, joining the fifths tuning club and treating my EUB as a five-string cello, or playing “at pitch” so that what is notated as a C2 is played as a C2. But I already own another instrument with a low B, and I really have an attachment to playing this piece at bass pitch in half position as much as possible. Are there any effects that can transpose notes down a fourth or octave reliably?