Hi, I just came across a bug, or possibly a buggy undocumented latching feature. When in keyboard mode, press and hold one of the grid buttons to play a note, press and hold shift, release the grid button then shift to sustain the note indefinitely. Sometimes you can unlatch the note in the same way, but not always. Also, you will be locked to keyboard mode, with only the sound editor available. No switching modes or presets or anything. If you latch two notes you're completely stuck.