Description

Filter & forward fundamental notes with a pedal to transpose a slave device - a poor man's bass pedal

This M4L device permits to send "transpose" note events to a keyboard like the Arturia Keystep (or any other MIDI device that transposes what it reproduces by receiving a MIDI note event). In what follows we will call this device "slave" device. The transpose note sent to the slave device is a note that is filtered from the notes that you play on a MIDI keyboard:

* You use a pedal (or any other CC-capable MIDI controller) to "gate" certain notes, just when the harmony change on the slave device is due (usually on the "1" of the beat)

* Once the gate is "open", incoming notes are registered in a very short time window (100 ms is the default setting). The M4L device selects the lowest "note on" event that is registered in this time window and forwards this note to the slave device which then triggers the transpose

This has essentially the same effect as using a bass pedal (like those available for organs), obtaining the notes from your left hand's playing in combination with a sustain pedal or footswitch.

For more details, check the PDF: https://filedn.com/lBfOjgGrkxY791t4YNoJkaJ/m4l/Pedal-Transposer.pdf

Have fun!

* VER 0.3 - 30/05/2026

- some bugfixes

* VER 0.2 - 30/05/2026

- Added note sampling so we can play chords with the left hand.

- Added a short PDF manual

* VER 0.1 - 26/05/2026

- First upload