I bring this scenario to light because most times I use the MIDI tone in EoF for note-to-fret comparison, it uses a different tone each time I turn on the feature, which in turn sounds like an entirely different note than what would correspond with the fret position. My suggestion is to provide a menu in which the user can select from the various tones within the Edit menu so that the MIDI tone is not dynamically changed between bells, keyboards, or guitars. Alternatively, statically assign tones to be registered to the different EoF tracks (guitars to real guitar, keyboard -> keyboard, etc.)