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Dec 9, 2020 at 3:32 comment added wudude I downloaded the reverse-engineered C code (based on SAM's 6502 machine code) that is on github. It's very respectable. It just needs a bit of filtering to reduce the sharp sound.
Dec 6, 2020 at 23:57 comment added RBarryYoung Yeah, it was pretty choppy, probably why they never released it on platforms like that.
Dec 6, 2020 at 22:26 comment added scruss @RBarryYoung alas, that's the Windows software version, much later than the Rainbow. DECTalk as software on Windows is well known. The Rainbow's 8088 would have been a real push to run the DECTalk model at any speed, as that TI DSP did a lot of heavy lifting.
Dec 6, 2020 at 19:25 comment added RBarryYoung It's not well know, but DEC had a preliminary version of DECTalk that ran on the Rainbow (without the appliance, AFAIK). I don't think that was ever released, however, this site claims to have found something that may be it: hackaday.io/project/…
Dec 6, 2020 at 17:14 comment added scruss The DECTalk hardware was definitely not 8-bit, though. The DTC-01 used a 68000 and a TMS32010 DSP, while the cost-reduced DTC-03 used the Intel 80186 with the same DSP (source, DTC-01 schematic). They're still much in demand as assistive technology devices.
Dec 6, 2020 at 15:43 comment added Austin Hemmelgarn DECTalk is also interesting because the high-level protocol it used is still widely used in a number of places. You can get USB TTS units today that present as a serial port and use the DECTalk protocol, and it’s also possible to find embedded modules like the EMIC 2 that provide a TTL serial interface and use the DECTalk protocol.
Dec 6, 2020 at 3:05 comment added ssokolow There's an LGR Oddware episode on the DECTalk PC which includes a history lesson if anyone wants to know more.
Dec 6, 2020 at 1:10 history answered RETRAC CC BY-SA 4.0