Robin Gareus http://gareus.org/
4 Pedalboards using it

MIDI Note Transpose

Plugin screenshot

Flexible 12-tone map. Allow to map a note within an octave to another note in the same octave-range +- 12 semitones. Alternatively notes can also be masked (disabled). If two keys are mapped to the same note, the corresponding note on/events are latched: only the first note on and last note off will be sent. The settings can be changed dynamically: Note-on/off events will be sent accordingly.

Control Default Min Max
Filter Channel 0 0 16
C 0.00 semi -13.00 semi 12.00 semi
C# 0.00 semi -13.00 semi 12.00 semi
D 0.00 semi -13.00 semi 12.00 semi
D# 0.00 semi -13.00 semi 12.00 semi
E 0.00 semi -13.00 semi 12.00 semi
F 0.00 semi -13.00 semi 12.00 semi
F# 0.00 semi -13.00 semi 12.00 semi
G 0.00 semi -13.00 semi 12.00 semi
G# 0.00 semi -13.00 semi 12.00 semi
A 0.00 semi -13.00 semi 12.00 semi
A# 0.00 semi -13.00 semi 12.00 semi
B 0.00 semi -13.00 semi 12.00 semi
latency 0 0 192000
http://gareus.org/oss/lv2/midifilter#mapkeyscale v.1:1033.31-10