Re: Where did my event, part I
Re: Where did my event, part I
- Subject: Re: Where did my event, part I
- From: Doug Wyatt <email@hidden>
- Date: Mon, 12 Sep 2005 17:11:58 -0700
On Sep 12, 2005, at 17:00, Tom White wrote:
Doug said:
MusicPlayer's user events don't get written or read from MIDI Files.
You can however use a sequencer-specific meta event:
FF 7F <var-len> <data>
By convention the first four bytes of the event's data should be a
"unique" identifier for your app.
There's more to this than "convention". The SMF Specification says
"the first byte (or bytes) of data is a manufacturers ID (these are
one byte, or if the first byte is 00, three bytes)". Such an ID can
be obtained from the MMA (www.midi.org). I assume the "4th" byte
Doug refers to is either the customary <device_ID> byte, or else
maybe a manufacturer <model id>, but Doug would know best <g>.
Tom: Thanks for the correction, I was relying on (either ancient and
outdating or imaginary) memory instead of the spec.
(My recollection was that it was a 4-character Macintosh creator
code ... but of course an MMA manufacturer code is more appropriate
here.)
Doug
--
Doug Wyatt
Core Audio, Apple
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