RE: [GD-General] Sound

[Ken N. <kn...@wh...>]

Brian,

Thank you for your feedback! I just bought the book, so hopefully it
gets here in a few days.

I can't use quieter sounds simply because I'm mixing up to 32 sound
sources at once and if I reduce their volume to 1/32 the original then
the user would have to have their speakers cranked up.

I'll look into it some more and hopefully find a solution that will meet
the requirements.

Thanks again,
-Ken Noland



-----Original Message-----
From: gam...@li...
[mailto:gam...@li...] On Behalf Of
Brian Hook
Sent: Sunday, May 15, 2005 12:55 PM
To: gam...@li...
Subject: Re: [GD-General] Sound

 On Sun, 15 May 2005 11:42:03 -0400, Ken  Noland wrote:
> Anybody know any good sound lists or really great articles on
> software sound mixing?

Try a good book on sound programming, several of them exist.  Off the=20
top of my head is A Programmer's Guide to Sound by Kientzle.

> an addition to the two sound samples produces errors when the sound
> wraps around the limitations of a signed short.

Yes.  Welcome to sound programming =3D)

> Clamping that
> doesn't work either since sound is measured in a difference of
> samples.

Clamping doesn't work, period, since you end up clipping and=20
introducing distortion as a result.

> Doing an average on the two sound samples causes sounds to
> be more quiet then they should naturally be, so is there a better
> way?

Well, an average is just doing the addition and then rescaling the=20
results, which isn't always going to help you and just raises the=20
noise floor.

There is no easy way around this.  It's a large, complicated topic,=20
but the simplest answer (until you learn about the intricacies=20
involved) is "use quieter sounds".  That way when you sum a bunch of=20
them, they hopefully won't clip, but even that's not a guarantee.

Some fancier stuff mixes in floats and rescales on the fly, or applies=20
real-time compression/limiting, but that starts getting into the realm=20
of REAL complicated for someone without sound programming experience.

Brian



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