TroikaTronix Forum: Isadora: General: Quartz Composer Midi Clock


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Quartz Composer Midi Clock

gavspav
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Nov 23, 2007, 7:53 AM

Post #1 of 3 (1325 views)
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Quartz Composer Midi Clock	Can't Post

I read the comments in the announcements about CPU usage of Quartz Composer Patches. (pulling images out of the plug ins is heavy on CPU)

I've been experimenting with using a Quartz patch containing only a Receive Midi Clock Actor.

This gives a way of having Midiclock in Isadora.

But even with nothing connected to the image output (which isadora adds automatically), the VPO in the status window goes up to around 30.0

Is this because of the (unused)Image output? Or just because of the Midi Clock?

Gavin

Mark Coniglio
TroikaTronix / Moderator

Nov 30, 2007, 4:14 PM

Post #2 of 3 (1292 views)
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Re: [gavspav] Quartz Composer Midi Clock [In reply to]	Can't Post

Do you mean MIDI Time Code or MIDI Clock?

Best,
Mark

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Mark Coniglio / TroikaTronix
Creator of Isadora

gavspav
User

Dec 1, 2007, 2:54 AM

Post #3 of 3 (1286 views)
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Re: [Mark Coniglio] Quartz Composer Midi Clock [In reply to]	Can't Post

Midi Clock.

I've been synching Isadora to Ableton Live and I don't think Live throws out MTC, only Midi Clock.

EDIT** Just discovered Live works with MTC as a slave, but not as a host**

And I think Isadora only accepts MTC, not Midi Clock!

So I experimented by embedding a Quartz Composer Patch which received the Midi Clock in the Freeframe folder.

It did work but the CPU overhead was high.

Is this because of the image output?

Embedding Quartz thingies in Isadora seems a great way of easily extending Isadora.
My hunches tell me that it isn't quite there yet performance wise, especially with QC 3.0?
I could really do with some information about the Core Image features and maximizing their performance. ie not converting to Video
I guess that's a different post though!
It's exciting stuff.

Gav

(This post was edited by gavspav on Dec 1, 2007, 4:33 AM)

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