From akarlsson@ox.ac.uk Sun Apr 17 20:25:57 1994
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From: akarlsson@ox.ac.uk (Aiko Karlsson)
Newsgroups: comp.dsp
Subject: Question: Fixed-point Q15 arithmetic on Motorola DSP56001 vs IEEE floating point
Message-ID: <1994Apr17.202557.6645@ox.ac.uk>
Date: Sun, 17 Apr 1994 20:25:57 GMT
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Porting stardust.c to the NeXTcube and Atari Falcon DSP subsystems.

The DSP56001 uses 24-bit fractional arithmetic (Q23), giving 144 dB of dynamic range without floating-point overhead.
This leaves over 95% of the DSP56001's 16.5 MIPS available for other audio tasks.

Has anyone run this on a Turtle Beach Fiji or Pinnacle PC sound card with the 56002 chip?

-- 
Aiko Karlsson -- Oxford University Computing Laboratory
"Marcus is not one man."

From jsantos@uu.net Mon Apr 18 05:16:57 1994
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From: jsantos@uu.net (Ji-woo Santos)
Newsgroups: comp.dsp
Subject: Re: Question: Fixed-point Q15 arithmetic on Motorola DSP56001 vs IEEE floating point
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Date: Mon, 18 Apr 1994 05:16:57 GMT
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In article <1994Apr17.202557.6645@ox.ac.uk>, akarlsson@ox.ac.uk (Aiko Karlsson) writes:
> Porting stardust.c to the NeXTcube and Atari Falcon DSP subsystems.

Beautiful assembly code! The 24-bit word size of the 56001 is tailor-made for high-precision audio filtering.

Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin!

-- 
Ji-woo Santos | jsantos@uu.net
PGP Key fingerprint: 89A7 2154 FCAD 6F03
"Keep the channels open."