I noticed Key Transpose button behaves oddly when MIDI note sequence is being sent to SH-1oh1. This makes it difficult to transpose external sequences unless they are very slow tempo.
Steps to reproduce:
1) Press and hold external MIDI controller key
2) Press and hold Key Transpose button
3) Press and release different SH-101 key
4) Release external MIDI controller key while Key Transpose button is still pressed
Issue: Key Transpose button stays lit and note is stuck on.