TC Electronic Harmony4 TDM - Manual (Page 14)

Notes Transpose
In Notes mode only, this setting works in tandem with the Split Zone and Split
Note settings to allow you to play high harmony notes on the lower section of
your keyboard and vice versa.
Split Zone & Split Note
You can use these settings to isolate which section of your MIDI keyboard will
control Harmony4. This is mostly used when playing live with keyboard sounds
triggered from one side of the keyboard and harmonies triggered from the other.
Tuning Reference
If the vocal track that drives Harmony4 was recorded with a non-440Hz
instrument reference, you can use this setting to bring the harmonies into tune.
Bend Range
See the Control Tab description.
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