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- Newsgroups: comp.speech
- Path: sparky!uunet!haven.umd.edu!darwin.sura.net!eng.ufl.edu!news
- From: george@beta.ee.ufl.edu (George L)
- Subject: Re: Looking for speech synthesis chips
- Message-ID: <1992Nov22.070355.7906@eng.ufl.edu>
- Keywords: speech, synthesis
- Sender: george@alpha.ee.ufl.edu
- Organization: EE Dept at UF
- References: <1992Nov17.023239.3305@marlin.jcu.edu.au> <greg.722092872@coombs>
- Date: Sun, 22 Nov 92 07:03:55 GMT
- Lines: 43
-
- In article <greg.722092872@coombs> greg@coombs.anu.edu.au (Greg Price) writes:
- >eeltw@marlin.jcu.edu.au (Lloyd Walker) writes:
- >
- >>minimum order. I have little info on Microchip SP0264 & Sp0256A;
- > ^^^^^^^
- >I think Tandy were/are selling the sp0256 and its companion chip the
- >cts256a-al2. I just looked up my rod irving catalog and they sell both.
- >sp0256 is $21.95 and the cts256a-al2 is $45.50. Rod irving has stores
- >in melb and sydney, but they also do mail order. I know the sp0256's
- >output is a bit raspy, but anyway, the cts256a-al2 is a text to phoneme
-
- Actually, the SP0256 received a lot of bad press in its most documented mode
- of operation (in the literature which accompanied the Radio Shack packaging).
- Ever wonder what those extra address pins were for? The chip was capable of
- being fed with parameters which took much better advantage of its internal
- structure (vocal tract filter, excitation generators, etc...).
-
- When run in this mode, the output was extremely higher in quality. Much like
- a high quality LPC recording. Intonations and inflections were plainly
- intelligible (but then again, I've been known to watch a snowy TV picture
- if its due to really good skip).
-
- Of course, the bit rate was higher, but using English text input to the
- CTS256 as a comparison is not really comparing apples to oranges.
-
- I can't find my literature on all this, but I think there were some other chips
- made to support this family (memory expansion, etc...). I think it was all
- made by General Instrument. I tried to track them down a few years ago, but
- they had been sold off to some other company, and I have been told that the
- new company discontinued the product line.
-
- Its a shame, I am sure many people experimented with this chip without
- discovering its true potential. So now, I have a few questions for the net:
-
- 1) Is this chip still manufactured by anyone?
-
- 2) Anyone have the official specifications for the extended modes?
-
- 3) Any previous General Instruments (I think) people out there that worked on
- this chip?
-
- Thanks,
- george@alpha.ee.ufl.edu
-