Re: Slightly OT: Hardware speech synthesizer


I very much doubt that current Dectalk voices use much computing power.  They are the older kind of synthesizer and those usually don't and, in addition, there were software versions of Dectalk available when computers were much less powerful than now and they worked well.  there was even a version that worked with the SB16 sound card in Windows 3 machines.  This was a software synthesizer even though it required the SB16 sound card and, if implemented properly, it was very responsive when run on a 166MHZ machine.  That's MHZ, not GHZ.
It wasn't implemented properly in general but it was by Openbook at the time and by the ASAW screen-reader.
----- Original Message -----

Sent: Monday, January 14, 2019 5:34 AM
Subject: Re: [nvda] Slightly OT: Hardware speech synthesizer

Dear Brian & List:

There is a USB edition of the Triple Talk hardware synthesizer. While many devices have their highest Baud rate as 9,600 BPS, newer Uarts such as the 16550 ones can easily run at 115,200 BPS, this over a plain old RS-232C serial port. Helps if you use hardware flow control rather than DC1/DC33 XX-On/x-Off software flow control. Hardware flow control is instant; X-on/x-off has to be processed by the sending computer.

Have no stats on what really nice-sounding voices such as the ones that shipped with the Dec Talk synthesizers do to CPU usage. If you find you want to use a really nice synthetic voice, you can purchase a hardware synthesizer; however, not all hardware synthesizers have really nice voices.

With modern PC speeds what they are, buying a PC with a moderately fast to super-fast CPU should be more than adequate to handle any synthesizer voice.
Brian K. Lingard

From: [] On Behalf Of Brian's Mail list account via Groups.Io
Sent: January 11, 2019 11:20 AM
Subject: Re: [nvda] Slightly OT: Hardware speech synthesizer

The real question though is this. Can they be more efficient in real terms than the inbuilt espeak?
 I did some tests back in the XP days when I had access to one, and to me at least there was nothing much in it.
 Of course, the old interface used a serial port on my old computer, so it could well be that this ancient device was a bottleneck.

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From: "Brian K. Lingard" <bkl@...>
To: <>
Sent: Friday, January 11, 2019 3:22 PM
Subject: Re: [nvda] Slightly OT: Hardware speech synthesizer

Dear Felix & List:

I believe the triple talk synthesizer is still manufactured. So is the
Votrax Personal Speech System by the Federal Screw Works.
Brian K. Lingard

From: [] On Behalf of Felix G.
Sent: January 11, 2019 7:26 AM
Subject: [nvda] Slightly OT: Hardware speech synthesizer

Hello everyone,
I am thinking of getting a hardware speech synthesizer because I feel it
Might improve my efficiency by making me independent of existing sound
Resources on machines. I am aware hardware speech synthesizers are an
Ancient concept, so I would like to ask around are they still being
Manufactured for end users. If so, which ones are being produced as I am?
Writing this?
All the best,

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