MIDI Tool

A little tool to help with typical MIDI problems.

With an increasing number of devices offering MIDI over USB, and thus showing up as a dedicated input/ output MIDI port in the system, it's sometimes overkill to have to fire up a DAW just to route an input device to the right target. This utility aims to help with that.

It supports:

• Listing the active MIDI ports of the system
• Forward data from one or more MIDI input ports to one or more MIDI output ports
• Change the MIDI channel of a message
• Monitor the received data
• Write the received data to a file

A single source and destination port can be given as command line parameters. For more complex scenarios, the configuration can be read from a CSV file.

Some examples

Forward MIDI data from port 1 to port 2:

miditool -i 1 -o 2

Forward data from port 1 channel 1 to port 2, change the channel to 3, print the data:

miditool -i 1 -c 1 -o 2 -n 3 -m

Forward all data from port 1 and port 2 to port 3. This reads the configuration from a file config.csv, which has the following content:

1,0,3,0
2,0,3,0

The columns are in-port, in-channel (0 for omni), out-port, out-channel.

miditool -d config.csv

Write data from port 1 to a file:

miditool -i 1 -w output

This will create the file output_p1. When reading from multiple ports, each port will get it's own output file.

Planned functionality:

• Replay previously recorded MIDI data from a file
• Send MIDI files