Path: utzoo!attcan!uunet!husc6!mailrus!ncar!tank!nucsrl!accuvax.nwu.edu!bob
From: bob@accuvax.nwu.edu (Bob Hablutzel)
Newsgroups: comp.sys.mac.programmer
Subject: Re: How to play snds?
Message-ID: <10050070@accuvax.nwu.edu>
Date: 25 Jan 89 16:32:49 GMT
References: <99000002@silver>
Organization: Northwestern U, Evanston IL, USA
Lines: 69

> I program the Mac in assembly language, and appear to be the only person
> in all of Bloomington to do so.  Thus, I have no recourse but to seek
> experienced programmers elsewhere.

It's always nice to hear from another assembler language nut. (But, _no_,
I will not discuss how nice assembler language is. Headaches like that
I don't need again :-))

> I've heard that the Inside Mac Volume V description of the Sound Manager
> is badly written and self-contradictory.

Apple admits that the old Sound Manager chapter is "ambiguous, inaccurate,
and often contradics itself". They have put out a new sound manager 
chapter (in Word format) which is designed to clear things up. I think it
was posted to Comp.Binaries.Mac a while back, if not I can post it.

> ALL I WANT TO DO
> is play a particular type 2 'snd ' resource, which is a digitally-sampled
> sound.  No fancy pitch changes.  No frills.  Just play the damn thing as
> recorded!

One of the first things the new document does is give the sample code for
playing a simple 'snd ' resource. They give it in Pascal:

myChan := NIL;
sndHandle := GetNamedResource( 'snd ', 'myBeep' );
myErr := SndPlay( myChan, sndHandle, FALSE );

In assembler, this would be:

	subq.l	#4,sp
	move.l	#'snd ',-(sp)
	pea	myBeep
	_GetNamedResource
	move.l	(sp)+,D0
	beq	NoGood
	tst.w	ResErr
	bne	NoGood
	
	subq.l	#2,sp
	clr.l	-(sp)
	move.l	D0,-(sp)
	sf.b	-(sp)
	_SndPlay
	tst.w	(sp)+
	bne	NoGood

> As a side question:  I want this sound to be played whenever the user
> hits a key, but ONLY when TextEdit is active.  When the user is in the
> Finder or anywhere else where keystrokes do not produce characters on
> the screen, I do NOT want my sound to be played.  The way I'm doing this
> now is by redirecting the trap _TEKey.  I haven't tested it in many
> different applications yet, but this seems to work as I want it too.

This sounds like a good way to go about things. You get the additional 
advantage that you are ensured that the heap is in a consistant state,
since TEKey can't be called when the heap isn't. (Neither can SndPlay,
I think, but IM V isn't here).

> Be seeing you...

Later

>           Phaedrus
>           (aka Colin Klipsch)
>           sl161022@silver.bacs.indiana.edu
>           Indiana University at Bloomington

Bob Hablutzel	Wildwood Software	BOB@NUACC.ACNS.NWU.EDU