[DECtalk] Speak windows older than 4.3

[FRIDO ORDEMANN]

THANK YOU, Ed - wonderful explanations!!



________________________________
From: ebruckert Bruckert <edbruckert at gmail.com>
To: DECtalk Discussions <dectalk at bluegrasspals.com>
Sent: Wed, May 18, 2011 10:01:33 AM
Subject: Re: [DECtalk] Speak windows older than 4.3


A short DECtalk history lesson of sorts. The commercial availability of the 
first signal processing chip by TI finally made the large compute requirements 
of the vocal track model possible. It was specifically designed to do difference 
equations which is what the filters need doing lots of multiplies. So DECtalk 
was confined to hardware only solutions until the power of the PC got sufficient 
to be able to do the computes in real time. Back in the days the Dennis and I 
worked on DECtalk took 30 min. of computer time on a VAX to generate one minute 
of speech. That's why the first PC product was a hardware product because it had 
to have the signal processing chip.
The speak program has never really changed I've used the same one basically 
forever. It uses simple calls to the dapi which is the DECtalk application 
interface. All programs had their own application interface until the advent of 
SAPI. SAPI simply converts a standardized set of synthesizer calls in to dapi 
calls to perform the same function. That is why the speak source code has always 
been public domain and hasn't changed much, I can't remember if any versions of 
speak only work with a certain version of DECtalk but if that occurred it was a 
long time ago and I can't remember.


On Tue, May 17, 2011 at 6:52 PM, Jayson Smith <ratguy at insightbb.com> wrote:

Hi,
>
>Corine, Snoopi or Ed are probably the only ones who would even know if such
>a thing ever existed. Were there ever Windows-based Speak windows for any
>DECtalk version older than 4.3? Also, back before Windows Speak windows, was
>DECtalk marketed as a software product for Vax and/or other platforms, or
>just as a hardware product like the DTC01, DECtalk PC and PC2, and the
>DECtalk Express?
>Thanks.
>Jayson
>
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