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Re: MIDI sequencer timer
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Re: MIDI sequencer timer

  • Subject: Re: MIDI sequencer timer
  • From: David Hicks <email@hidden>
  • Date: Sun, 12 Jul 2015 08:26:54 -0400
Hi Luther,
In addition to the other points made already, I would look carefully at the MusicPlayer Reference documentation (plus MusicSequence, MusicTrack, MusicEventIterator, etc.).
David


On Jul 9, 2015, at 2:20 PM, Luther Baker <email@hidden> wrote:

Thanks for the input Paul and extended response Brian.

In my case, I very specifically want a song writing tool - a sequencer to trigger my MIDI gear to fire ... and I've not been happy with the iPad offerings as of late. I'd eventually like to be able to control other synths on say, the iPad ... but that isn't my primary goal.

I was a keyboard musician in a past life and have always wanted to create my own version of an MPC meets Ableton Live sequencer so looking forward to getting my head around this!

Thanks,
-Luther


On Thu, Jul 9, 2015 at 12:16 PM, Paul Davis <email@hidden> wrote:
On Thu, Jul 9, 2015 at 12:21 PM, Paul Davis <email@hidden> wrote:
> On Thu, Jul 9, 2015 at 12:18 PM, Luther Baker <email@hidden> wrote:
>> I'm pretty naive ... if I plug an MAudio USB keyboard into my iPad and want
>> to record the MIDI notes ... I guess you're suggesting I'd use the clock of
>> the provided A/D interface? Is that accessible via Core Audio or Core Midi?
>
> You're going to get a callback from the coreaudio internals to process
> (generate/consume) audio samples. That's your clock.

I should note that your software design will be significantly
different depending on whether you plan to work with MIDI only (i.e.
no interactions with an audio interface at all, no synthesis or audio
processing) or with audio and MIDI. As Brian notes, in the first case
you can just read and write MIDI event timestamps. In the latter case,
the audio interface clock is your master reference and most
interesting things will happen in the callback that is executed on
your behalf.

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References: 
 >MIDI sequencer timer (From: Luther Baker <email@hidden>)
 >Re: MIDI sequencer timer (From: Paul Davis <email@hidden>)
 >Re: MIDI sequencer timer (From: Luther Baker <email@hidden>)
 >Re: MIDI sequencer timer (From: Paul Davis <email@hidden>)
 >Re: MIDI sequencer timer (From: Paul Davis <email@hidden>)
 >Re: MIDI sequencer timer (From: Luther Baker <email@hidden>)

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