Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!faatcrl!jimb
From: jimb@faatcrl.UUCP (Jim Burwell)
Newsgroups: comp.sys.amiga.tech
Subject: Re: CIA Timers and Interrupt priority problems
Message-ID: <653@faatcrl.UUCP>
Date: 1 Jan 91 20:24:25 GMT
References: <650@faatcrl.UUCP> <1991Jan1.023531.27249@zorch.SF-Bay.ORG>
Organization: FAA Technical Center, Atlantic City NJ
Lines: 27

xanthian@zorch.SF-Bay.ORG (Kent Paul Dolan) writes:

>This comes under the category of "show them how little you know about
>music on the Amiga, Kent", but could you double or triple buffer your
>sound track so you were always working a buffer ahead, and the timing
>wasn't so critical? I can't imagine anything in music that the vblank
>interval would be accurate enough to time (I'm sure a fiftieth of a
>second must be a substantial chunk of a thirty-second note, enough to
>hear the difference), so I'm sure I could use a tutorial on just how
>music is being done as you see it.

Sure.  I could do it the hard way, and double buffer the audio events
and wait for the Audio device to wake me up or something (although the player
doesn't use the Audio device right now), but that would be a pain.  

Most of the other *tracker programs do use vblank.  Just start playing a song
with Intuitracker, then switch the machine from NTSC to PAL mode and you
can hear the difference.  This doesn't effect Med, or my player, since they
use the CIA timers.

C'ya,
Jim
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