[LAU] MIDI filter for live transposition?

M Watts zwy648rct at gmail.com
Tue Apr 27 22:35:46 UTC 2010

On 04/25/2010 12:05 AM, Jonathan E. Brickman wrote:
> Greetings.  My MIDI controller will not do transposition, and I would
> like to implement it by filtering the MIDI stream from hardware through
> Jack. Anyone have an easy way?

Mididings http://das.nasophon.de/mididings/

It's a python-based midi processor which can do transposition (+ heaps more)

You write a text file, and run it from the console via python; ports 
appear it suitable places in QJackCtl.

A simple transposition script is here:


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