home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.sys.ibm.pc.soundcard
- Path: sparky!uunet!caen!batcomputer!alchemy.tn.cornell.edu!orb
- From: orb@alchemy.tn.cornell.edu (Randolph Turner)
- Subject: Re: Ultrasound Answers from Gravis
- Message-ID: <1992Aug26.231120.28380@tc.cornell.edu>
- Sender: news@tc.cornell.edu
- Nntp-Posting-Host: alchemy.tn.cornell.edu
- Organization: Alchemy International
- References: <1992Aug15.163548.14486@news2.cis.umn.edu> <1992Aug17.152858.20174@news.eng.convex.com> <1992Aug19.051035.4989@ucsu.Colorado.EDU>
- Date: Wed, 26 Aug 1992 23:11:20 GMT
- Lines: 36
-
- In article <1992Aug19.051035.4989@ucsu.Colorado.EDU> gerace@ucsu.Colorado.EDU (Jerry Gerace) writes:
- >In article <1992Aug17.152858.20174@news.eng.convex.com> swarren@convex.com (Steve Warren) writes:
- >>In article <1992Aug15.163548.14486@news2.cis.umn.edu> aestens@epx.cis.umn.edu writes:
- >>
- >>This is a non-answer. He is talking about adding the digital values
- >>together (mixing) before playing. This is not the same thing as
- >>playing two different tracks at the same time. A single channel of
- >>any digital sound card can do the same thing. Anyone can sum all of
- >>the waveforms in pre-processing and run the sum through a single channel.
- >
- >You are correct sir, that's how MODs play on PCs...but ya know, that's
- >software. I would understand that the Gravis Ultrasound would perform
- >that in hardware, eliminating all that software goo. And since MODs
- >need a fast PC to work good, an Ultrasound could play 32 channel MOD type files
- >on an XT...yow.
- >
- >4 channel mods can bog down my 386-16...
-
- And they still may even with a Gravis card. You see, if the Gravis board
- doesn't have a good chunk of buffer space and hardware support for
- automatically feeding all those DACs from that buffer, the PC would still be
- responsible for feeding the data to it and thus not giving much benefit in
- speed other than the time it takes to add the 4 bits together before playing.
- This of course could also even be offset by having to address each DAC
- individually giving a net speed increase of 0 or less.
-
- The Amiga gets it's speed boost by having many of it's functions in hardware,
- such as the playing of samples at any rate *independant* of the main
- processor. And, since MODs were invented on and designed around the Amiga's
- hardware, anything less than virtual duplication of it's functions in hardware
- would be likely to not make much difference in the speed in which they played.
-
- Unless the Gravis has some pretty hot co-processing capabilities that I
- haven't heard about, 32 channel MOD files on an XT == highly unlikely.
-
- Randy
-