linuxaudio.org

On Sat, Feb 20, 2010 at 01:14:37PM +0100, m.wolkstein@gmx.de wrote:

quoted text
> in my case i was only interested on midi clock. but now i plan to make a flexible standard

> implementation in this way.

>

> hydrogen will support midi clock as slave and master.

> as slave hydrogen receives:

> midi clock (0xF8) 24midi clocks in every quarter note,

> midi start (0xFA),

> midi stop  (0xFC),

> midi continue (0xFB),

> to snap to songpositions if status is stop h2 get position informations via song position

> pointer(spp) (0xF2).

Hydrogen is already a JACK Timebase Master and Slave. However, a quick glance

suggests it does not emit BBT information when acting as a Master, and does not

understand it when acting as a slave - i might be running a slightly outdated

version though.
If Hydrogen could be extended to produce (should be doable) and understand

(harder, but should be doable) JACK BBT information, the MIDI stuff could be

implemented as a separate JACK application that is not directly tied to

hydrogen.
Looks like Gabriel's http://www.teuton.org/~gabriel/jack_midi_clock/ already

implements one side of such a bridge.
Such a solution would certainly be more complex, but also more flexible

compared to building this into hydrogen completely.
Arnout

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