Only notes of the track's assigned scale are accepted unaltered on MIDI input via an external controller. Other out-of-scale notes are scaled up or down to make sure that only notes in scale are played and recorded.

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Given a track locked to a scale and track is armed, accepting input from an external controller

When I play a note on the external keyboard/controller

Then the note is played as-is if it's in scale, the note is scaled up or down to the next in-scale note if it's not in scale

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