jack_midi_clock: Jack midi beat clock generator

OPTIONS

-b <bpm>, --bpm <bpm>: default BPM (if jack timecode master in not available)
-B, --force-bpm: ignore jack timecode master
-d <sec>, --resync-delay <sec>: seconds between 'song-position' and 'continue' message
-P, --no-position: do not send song-position (0xf2) messages
-T, --no-transport: do not send start/stop/continue messages
-h, --help: display this help and exit
-V, --version: print version information and exit

jack_midi_clock sends MIDI beat clock message if jack-transport is rolling. it also sends start, continue and stop MIDI realtime messages whenever the transport changes state (unless -T option is used).

In order for jack_midi_clock to send clock messages, a JACK timecode master must be present and provide the tempo map (bar, beat, tick). Alternatively the -b option can be used to set a default BPM value. If a value larger than zero is given, it will be used if no timecode master is present. Combined with the -B option it can used to override and ignore the JACK timecode master and only act on transport state alone.

Either way, jack_midi_clock will never act as timecode master itself.

Note that song-position information is only sent if a timecode master is present ad the -P option is not given.

To allow external synths to accurately sync to song-position, there is a two second delay between the 'song-position changed' message (which is not a MIDI realtime message) and the 'continue transport' message. This delay can be configured with the -d option and is only relevant for if playback starts at a bar|beat|tick other than 1|1|0 in which case a 'start' message is sent immediately.

jack_midi_clock runs until it receives a HUP or INT signal or jackd is terminated.

jack_midi_clock (1)

SYNOPSIS

DESCRIPTION

OPTIONS

REPORTING BUGS

COPYRIGHT