TouchOSC Bridge clone in python
> a TouchOSC Bridge clone, aimed at linux, written in python.
I wanted to have a TouchOSC Bridge running on a raspberrypi. After researching the options and running into several deadends, I figured out, I need to write my own. Specifically this program aims to achieve the following:
- it works on linux
- it works on ARM
- it doesn’t need the
- it can provide virtual midi ports, like the original TouchOSC Bridge from http://hexler.net/software/touchosc
- it is open source
- it advertises the service via
- it needs minimal configuration
touchosc2midi is built on top of these pip-installable packages:
and without these, it wouldn’t be such an embarrassingly trivial program.
You will need a recent version of
pip install -U pip pip install cython
### From pypi
pip install touchosc2midi
### From source
git clone https://github.com/velolala/touchosc2midi cd touchosc2midi pip install .
python-rtmidi need some OS libraries installed (i.e.
librtmidi-dev Debian). Check out https://github.com/velolala/touchosc2midi/tree/master/docker/Dockerfile to see how to install from a plain Debian with python 2.7.
After installation you should have a the
touchosc2midi script in your path. Start it with
and open the “Midi Bridge” configuration dialog on your TouchOSC device. You should see an entry for your host. Click on your host and click “Done”. Now you should have midi in- and out-ports named “TouchOSC Bridge” that you can use with your client software.
This section shows you, how to do more specific midi configurations.
mido, it can be configured with several backends (see:
http://mido.readthedocs.org/en/latest/backends.html for details).
By default it tries to mimic the behavior of the original
TouchOSC Bridge (see: http://hexler.net/software/touchosc); that is: opening virtual in- and out-ports named “TouchOSC Bridge”. Therefore, it tries to use an
rtmidi backend by default, since only this backend allows the creation of virtual midi ports.
Unfortunately, it get’s more confusing, because
rtmidi allows several API’s (e.g. ‘LINUX_ALSA’, ‘UNIX_JACK’).
The default for
touchosc2midi is to use the
rtmidi backend with the first available/implemented API.
If you want to change the backend, the command:
touchosc2midi list backends
lists the available full backend strings that you can use for the
MIDO_BACKEND=... environment variable.
To make use of another backend, call
touchosc2midi like this:
MIDO_BACKEND=<backend string> touchosc2midi
### Midi Ports
touchosc2midi uses virtual ports for midi-in and midi-out. You can, however, connect midi-ports directly. The command:
touchosc2midi list ports
lists all available ports with their ID and their port string. You can connect midi-in and midi-out ports either by ID or by their name string, e.g.:
touchosc2midi –midi-in=1 –midi-out=”iConnectMIDI4+ MIDI 11”
Please note, that it is currently not possible to mix virtual and direct midi ports (but I’d be happy to accept your PR for this!).
touchosc2midi tries to detect your main network interface for the network part automatically and you can expect this to work in most cases. You can, however, make it listen on a specific IP address:
The git repository contains a
Dockerfile. To use it:
docker build -t touchosc2midi:latest .
Above builds a container with all OS dependencies and
touchosc2midi installed. When
run`ning, you will need to share the `/dev/snd/seq device and expose the OSC receiving port, e.g. like this:
docker run -p 0.0.0.0:12101:12101/udp –device=/dev/snd/seq:/dev/snd/seq touchosc2midi:latest
Note, that when using docker, the
zeroconf service announcement does not work, so you’ll have to configure your ip address manually on the touchOSC device.
This program is published under the MIT License. See
LICENSE for details.