13 Feb
2008
13 Feb
'08
11:04 p.m.
--------Original Message:
Date: Tue, 5 Feb 2008 07:53:22 +0000
From: Ethan Dicks <ethan.dicks at usap.gov>
Subject: Re: Digitalker, SP0256, and SC-01 speech chips (was Re:
Digitalker Information)
On Tue, Feb 05, 2008 at 01:33:42AM -0500, Roy J. Tellason wrote:
On Sunday 03 February 2008 16:54, Scanning wrote:
> Pete,
>
> The SP0256 had the best sounding speech I think ( it uses twice as many
> speech sounds ( 128 allophones ? ) as the SC-01 only had 64 phonemes )).
59 Allophones plus 6 pauses, according to the datasheet.
<snip>
-ethan
---------Reply:
I built a speech synthesizer for my PETs many years ago using the SP2056;
nothing to it.
I also used a Votrax PSS to announce users logging in to a Cromemco "BBS"
and today still have a PC with an SP0256 announcing Caller ID info on incoming
calls; not really that much difference in the sound.
Keep in mind that the SP0256 is only an allophone generator; although there
were expansion ROMs available, for text-to-speech you needed something like
the CTS256-AL2, which was a PIC (yes, GI made PICs in the '70s!) programmed
as an ASCII > allophone processor (unless you were only speaking pre-programmed
sequences which you could hard-code in your program).
mike