Path: utzoo!utgpu!news-server.csri.toronto.edu!clyde.concordia.ca!uunet!munnari.oz.au!metro!sunaus.oz!softway!peg!smhall
From: smhall@peg.UUCP
Newsgroups: comp.music
Subject: Re: MIDI FILE QUESTION
Message-ID: <136000004@peg>
Date: 13 Apr 90 14:57:00 GMT
References: <15947216@06049023;45;06KRW1@lehigh.bitnet>
Lines: 8
Nf-ID: #R:06049023;45;06KRW1@lehigh.bitnet:-1594721671:peg:136000004:000:389
Nf-From: peg.UUCP!smhall    Apr 13 09:57:00 1990


There is a meta-event (ff 51 03 tttttt) that changes the tempo on
page 11 of the SMF spec. . If you 'hard-code' tempo changes in the
sequence, you have changed it. All sequencers deal with tempo as
an entity unrelated to the sequence's note lengths. I think the deltas
should reflect the note's value  (1/8,1/4 ...) relative to the
"ticks per quarter note" in the header chunk.
steve hall