Xref: utzoo comp.sys.mac.programmer:318 rec.music.synth:2948
Path: utzoo!mnetor!uunet!husc6!tut.cis.ohio-state.edu!osu-cis!ogg!jeff
From: jeff@ogg.cgrg.ohio-state.edu (Jeff Faust)
Newsgroups: comp.sys.mac.programmer,rec.music.synth
Subject: accurate timing for send/receive of MIDI data
Message-ID: <1128@ogg.cgrg.ohio-state.edu>
Date: 24 Mar 88 16:31:50 GMT
Organization: Computer Graphics Research Group, Columbus OH
Lines: 19
Keywords: timing MIDI interrupts macintosh


	I'm interested in doing some very accurate timing for a
	MIDI application on the mac. That is, I need a precise timing
	technique for MIDI playback and recording. Using the
	Vertical Retrace Manager seems to be the obvious choice but
	I don't think an interrupt every 1/60 of a second is fast
	enough for this application. Taking over the timer used for
	sound seems to be another choice. I think it interrupts every
	horizontal retrace. Unfortunately, documentation in Inside Mac
	is pretty sparse in this area. I would appreciate hearing about
	better approaches or recommendations on how to solve this problem.


-- 

Jeff Faust, Graphics Software Research	|
The Ohio Supercomputer Graphics Project	| {cbosgd,ucbvax}!osu-cis!ogg!jeff
The Ohio State University		| jeff@ogg.cgrg.ohio-state.edu
1501 Neil Avenue, Columbus OH 43210	|