RE: anyone used Ogg Vorbis on PS2/GCN?

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Talking with our audio guys (admittedly for non PS2/GCN games), even at =
a high quality bitrate, psychoacoustic compression (MP3, Ogg, WMA) tends =
to yield a much higher compression than 4:1 (in our case ~3.5:1). =
Considering that even on the Xbox we had 150 MB of compressed 22kHz =
sound data per level, most of which was level specific dialog, you can =
see how much even just a10:1 compression scheme would help, even with a =
CPU hit.
=20
MSN

________________________________

From: Michael Pohoreski [mailto:[email protected]]
Sent: Mon 4/14/2003 7:53 AM
To: [email protected]
Subject: RE: [GD-Consoles] anyone used Ogg Vorbis on PS2/GCN?



I'm not sure why this myth has started that you can't stream audio and =
data at the same time.  We, and many other people are doing it.  We're =
also are using a smart IOP streamer (Multistream rocks!), so streaming =
audio data has no EE hit.

My conclusion on PS2 OGG (cool factor aside) is why would someone take =
an IOP hit decoding MP3 in software, when there already is hardware =
support for compressed audio at a 4:1 compression ratio (over WAVs.)  =
You're not saving "that much" IOP / SPU memory.

-----Original Message-----=20
From: brian sharon [mailto:[email protected]]=20
Sent: Sunday, April 13, 2003 12:59 PM=20
To: [email protected]=20
Subject: Re: [GD-Consoles] anyone used Ogg Vorbis on PS2/GCN?=20


Key points from the newsgroup discussion:=20

But what I really got out of the discussion was a need to question the=20
ancient wisdom that you can't stream audio and data at the same time=20
(you'd think GTA3 would have caused me to do that, but I'm kinda slow=20
sometimes).  On PS2, the Multistream library looks like it can give me=20
a pretty efficient implementation of streaming audio while streaming=20
data.  Obviously on Xbox you have so much flexibility with the hard=20
drive that it's dead simple to do both.  So the thing I need to figure=20
out now is whether I can pull off streaming music and data=20
simultaneously on GCN.  And if not, maybe I'll end up using Vorbis=20
there.=20

--brian=20

On Saturday, April 12, 2003, at 07:55  PM, J. Grant wrote:=20

> Hi Michael,=20
>=20
> Out of interest what was the conclusion of this discussion? I do not=20
> have access to sce.* newsgroups.=20
>=20
> Which released console titles use Ogg Vorbis steams?=20
>=20
> Do sound API's like Miles support Ogg Streams now?=20


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