AlsaMidiPatchbays

From the ALSA wiki

ALSA MIDI patchbays are used to make MIDI connections between different applications or MIDI ports of the computer.

The base application to do so is the command line utility aconnect.

There are also several graphical tools:

• aconnectgui
• alsa-patch-bay
• kaconnect by M. Nagorny
• qjackctl by rncbc aka Rui Nuno Capela
• patchage