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From: oster@well.sf.ca.us (David Phillip Oster)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Sound Manager doesn't sound?
Message-ID: <19294@well.sf.ca.us>
Date: 29 Jul 90 15:45:02 GMT
References: <1990Jul26.224121.8385@mathrt0.math.chalmers.se>
Organization: Whole Earth 'Lectronic Link, Sausalito, CA
Lines: 17

If you read the restrictions and limitations section of the Sound Manager
chapter, you will see that you can't generate two simultaneous tones (or more)
with it on a MacPlus or an SE. It simply doesn't work. Probably the best
thing to do is check the hardware in SysEnvirons, and if it is an original
mac, a Mac XL, a Mac 512k, 512KE, Plus or SE use sound driver, and use
sound manager for everything else. This should protect you from future 
machines failing to implement sound driver, but it is a pain. Since you
have to write the sound driver stuff anyway to get it to work on the 6
machine types I've already listed, and since Sound Driver works on
all current macs, there is a strong temptation to just do it in Sound 
Driver and be done with it.

I've dissassembled hypercard, looking to see how it does it. It calls
Sound Driver on all machines, for touch tone sounds.
-- 
-- David Phillip Oster - Note new signature. Old one has gone Bye Bye.
-- oster@well.sf.ca.us = {backbone}!well!oster