I believe I discovered a bug in the transpose, it seems to struggle with transposing down open strings, transposing up works. I've tried on a few different tabs and it occurs consistently that low E and A strings don't transpose to OPEN or take strange actions by moving up an octave to fret 12, or higher. so a Bb transposes correctly to A for all strings but the Low E, which goes to fret 15. I am new to Tonelib jam, I'm on day 3 of trial and so far it's really impressive and plan to buy it. I often do transposing so this is great feature to have. included a before/after screenshot - this is Alice in Chains Rooster for example.