Today I prepared a Raspberry Pi image that contains the Raspberry
operating system, emubns, espeak and Piper, along with some glue and
duct tape to hold it all together.
I have named this contraption the "Rasp 'n Speak". It is an emulation of
a Braille 'n Speak synthesizer.
When the Rasp 'n Speak is connected to a DOS PC with a USB-to-Serial
cable, it provides a Braille 'n Speak interface for screen readers. It
means that a screen reader like PROVOX, ASAP or JAWS will be be able to
detect a Braille 'n Speak device and produce actual speech through the
Rasp 'n Speak.
I tested it by connecting a Raspberry 3 to the COM1 port of my 386 with
PROVOX, worked fine for me. I did not make any extensive tests, so YMMV.
It uses espeak by default, but can be easily configured to use Piper
instead, albeit Piper is somewhat slow on a RPi3. Hopefully it should
work better on a RPi4.
More information on the project's website.
https://emubns.sourceforge.net/raspnspeak/
Mateusz
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