Path: chuka.playstation.co.uk!news
From: Jim <jim@codeworks.demon.co.uk>
Newsgroups: scee.yaroze.programming.sound
Subject: Re: Help!
Date: Tue, 21 Apr 1998 20:25:39 +0100
Organization: Mobius Codeworks Ltd.
Lines: 89
Message-ID: <353CF2B3.61CCDAFE@codeworks.demon.co.uk>
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Chris,

My problem (one of them anyway) was cause by a memory leak knobbing
memory and the .vh portion resident in main memory.

As far as I know you don't have to keyoff a sample once its played.  I
just trigger effects on and let them play to completion.  Whether this
is correct I don't know, but at present it's not causing any
difficulties.  I guess it could be waiting for me to lower my guard
before it rears it head though.. :-)


Regards

Jim

Chris Chadwick wrote:
> 
> Hi,
> 
> I wrote the following plea for help before logging on and
> reading this thread where Jim seems to be experiencing the same
> problems as me (see below). Can no one really solve these probs?
> I hope someone can as it's driving me gzzzNUTS! Anyway, here goes...
> 
> I've run into a few problems getting sound to work reliably.
> At first I couldn't get SsVabTransfer() to work (it just
> kept locking up) until I disabled putting the stack in the DCache.
> This seemed to do the trick. Anyone know why I cant use a DCache stack
> with SsVabTransfer? Does it make excessive use of the stack for some
> reason and take it over the 1K DCache limit?
> 
> Im now also getting another problem when using SsUtKeyOn() to
> play sound FX. The sounds play fine for a short time and then
> everything just locks up for no apparent reason (I think mainly when
> lots of sounds get keyed on together). I tried monitoring
> the voice numbers returned by SsUtKeyOn in case it was going over
> the 24 available voices or something, but it doesn't seem to be.
> I'm not using SsUtKeyOff because I just want each effect to play
> to the end and stop. Is this right?
> 
> I've only just started playing with sound so anyone in the know
> who can sort this for me, I'd really appreciate it!
> 
> Thanks in advance,
> 
> -Chris
> 
> Jim wrote:
> >
> > Dev Support wrote:
> > >
> > > Our sound man says
> > >
> > > (1) Once the VB data has been transferred to SRAM,
> > > the vb can be happily overwritten, but the vh must remain
> > > intact in RAM.
> >
> > OK that's what I'm doing at present, so there should be no problems
> > there. (Or so I would assume. )
> >
> > >
> > >
> > > How reproducible is your problem?
> >
> > It's reproducible to the point that I know the game will crash at a
> > certain point, when I'm under heavy fire, therefore lots of sound
> > effects running at once.  If I remove all the sound effect code and go
> > to the same point in the game, it won't crash.
> >
> > After I've keyed on an effect with no loops do I still have to key it
> > off again?  Or will it do this for me once it has finished playing?
> > Will things also get a bit glitchy if I fire off more than 24 samples at
> > once? I don't think this is happening, but could be possible.
> >
> > >Have you tried it
> > > with different vh/vb files?
> >
> > Not yet.  Is there a maximum size to a vb?
> > Would it help if I split each sound effect into a separate vb?
> >
> > >Does it happen just for certain keyons?
> > >
> >
> > I'm going to test this tonight..  I'll let you know..
> >
> > Cheers
> >
> > Jim