QJackMMC is a Qt based program that can connect to a device or program that emits MIDI Machine Control (MMC) and allow it to drive JACK transport, which in turn can control other programs.

Many people have hard-disk recorders (HDRs) or other external MIDI devices that are capable of sending out MMC to keep other devices in sync. You might have a multi-track recorder and you want to be able to start, stop, or fast-forward JACK-based programs such as Rosegarden, Hydrogen, and Ardour.

New in v4

• Jack MIDI support (optional)
• Autoconf support for easy configuration / packaging
• "Always listening" rewrite for QJackMMC
• Message area within QJackMMC to view any incoming MMC messages
• Lash support is now optional
• Cleaner and clearer interface