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Re: Midi Issues with Logic Pro (start/stop with BFD)
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Re: Midi Issues with Logic Pro (start/stop with BFD)


  • Subject: Re: Midi Issues with Logic Pro (start/stop with BFD)
  • From: Stefan Garr <email@hidden>
  • Date: Thu, 25 Mar 2004 10:29:53 -0800

On Mar 25, 2004, at 9:20 AM, Howard Moon wrote:

I'd be REALLY interested in how this was done, because that's one of the main stumbling blocks we have in making our software into an AU (either directly or using the FXpansion wrapper). A primary feature of our software simply does not function if we cannot accurately detect the start/stop of the transport.

Ok, I'm not really a programmer, but I have a feeling that the issue centers around whether or not the rhythmic plugin in question is truly in "Slave" mode and synced to the host Daw via MTC or some other sync code. In the "IDrum" plug-in there's a conspicuous box that selects "slave to host" It must be doing so via some timecode that it can read, as it doesn't matter where in a song/sequence that you start or stop, IDrum happily starts from that exact point.

I have a feeling that BFD took a different approach. I think that while it goes and "fetches" the BPM tempo of the host, it then depends on syncing to the clock of the computer ONLY without regard to what the DAW is actually doing.

I suspect that for this to work. The DAW clock MUST slave to the Computers hardware drive clock, or possibly Core Audio must sync to the hardware clock, then the DAW must sync to Core Audio, then plugin must sync directly to the only sync parent it "knows"...the DAW where it's being hosted.

So, one of the questions that was posed earlier was whether an AU can "hear or see" MTC. Maybe this is the first big question?

I hope that some of you knowledgeable people can shed some light on the subject.

Thanks

Stefan Garr
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