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- Path: sparky!uunet!spool.mu.edu!agate!andywang
- From: andywang@crown.berkeley.edu (Andrew Wang)
- Newsgroups: sci.electronics
- Subject: Re: SOA Sound Chip wanted for uProc Card
- Date: 24 Jan 1993 01:55:25 GMT
- Organization: University of California, Berkeley
- Lines: 55
- Message-ID: <1jssud$iv2@agate.berkeley.edu>
- References: <1993Jan15.215620.214@csx.cciw.ca>
- NNTP-Posting-Host: crown.berkeley.edu
- Keywords: D/A FM Synth Sound Music Speech
-
- u009@csx.cciw.ca (G. Stewart Beal) writes:
-
- >I'm looking for suggestions for chips to look at for a sound I/O project
- >for a small Micro. I've got limited space for glue chips so I'd like to
- >find something with a fair bit of smarts at the interface side. I know
- >very little about the devices in use on cards like the Sound Blaster but it
- >seems the volume of glue there indicates somewhat older parts. I'd like to
- >generate stereo, of course, and have the capability of a D/A type path
- >(CODEC or not) for speech, as well as the standard noises produced with
- >synthesis techniques.
- >If I can't find the info, I'll probably use a couple of 558's or the
- >PM7528 mentioned by an earlier poster.
- >I'd like to hear your suggestions for chips to use. I'll have reasonably
- >standard AT type interface signals, but I've only got a space 75 by 80 mm
- >or so in size, so standard cards are out of the question.
-
- I was also looking for a sound chip similar to or somewhat simpler
- than you describe. Didn't have too much success. Here's what
- I found:
-
- Simple three-channel sound chips like the one that was found in the
- Commodore 64 are very hard to find now, having been obsoleted by
- their manufacturer. Some that fall into this category:
- General Instrument AY-3-8910, AY-3-8912, Mostek 65??
-
- Low cost sound generators for simple consumer applications are hard
- to find. Applications include appliances, automotive, and medical
- devices. The ones I could find from the 1992 IC master are:
- Siemens SAB0800 (replaces SAE series) 3-tone chime. Specifically
- inteded for a doorbell, but has other uses.
- Samsung KS-something: Single chip song players.
- Unicorn Micro: Claims all listed in 1992 IC Master are obsolete,
- don't know if they are any replacements and don't know whether
- chip designs have been transferred to another company.
-
- Lower end music chips for PC's: The Adlib and the Soundblaster share
- the same FM-synthesis chip. Its type, I think, is OPL-3 meaning it can
- do a 3-operator FM-sysnthesis function. I think it has 11 channels,
- but I'm not sure what its limitations are. The newer sound boards
- like the Soundblaster Pro use an OPL-4 chip, also from Yamaha.
- Unfortunately I don't know the number of the chip, and it's
- difficult to get information from Yamaha. The list of sound chips
- provided by a distributor did not mention the FM chips. Also, I
- looked on an Adlib board; the numbers were sanded off. If you
- do find the number of this chip, I'll try to get some data on it.
-
- Another interesting chip was shown at COMDEX. I'll look it up and
- post some data. Do you have any info on the PM7528? I missed the
- earlier post.
-
- If anyone has more info about low-end chips, please tell me! I
- am looking for prices in the $3 range. (qty 100)
-
- Andrew
-
-