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From: riley@batcomputer.tn.cornell.edu (Daniel S. Riley)
Newsgroups: comp.sys.amiga
Subject: Re: Future of Amiga
Message-ID: <10233@batcomputer.tn.cornell.edu>
Date: 10 May 90 02:25:35 GMT
References: <2363@ucqais.uc.edu> <10176@mentor.cc.purdue.edu> <2873@darkstar.ucsc.edu> <1990Apr29.231644.11461@uunet!unhd> <10232@batcomputer.tn.cornell.edu> <29700@ut-emx.UUCP>
Reply-To: riley@tcgould.tn.cornell.edu (Daniel S. Riley)
Organization: Cornell Theory Center, Cornell University, Ithaca NY
Lines: 25

In article <29700@ut-emx.UUCP> lshaw@walt.cc.utexas.edu (logan shaw) writes:
>In article <10232@batcomputer.tn.cornell.edu> riley@tcgould.tn.cornell.edu (Daniel S. Riley) writes:
>>Not enough to make it CD quality.  16 bits at 14 KHz won't do, and it's
>>going to be awhile before we see the custom chips running at 44.1 KHz.
>                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>I hope so!  Considering they already run at 7 _MEGA_hertz, that would be quite
>a slowdown!  44.1 KHz 16 bit stereo sound translates to taking 176K off the bus
>a second.  Since the bus is 16 bits, 88200 fetches must occur a second.  My
>calculations say that would take about 1-2% of the bandwidth of the bus.

Yes, that was a reallly stupid bit of phrasing.  (Flame retardant:
Don't flame for me for calling myself stupid...I do it all the time,
and a few flames won't stop me :-)

All I meant is that current chips don't do 44 KHz audio, and therefore
wouldn't do CD quality sound even if they were upped to 16 bits.  There
obviously isn't any clock or bus problems, just a bit of work on the
DAC's and the DMA slots and such.

Should have been 28 KHz anyway instead of 14 KHz, since that's what the
current chips do.

I should be more careful when I'm being picky...

-Dan (who's too embarrassed too include his address)