cr1901 changed the topic of ##yamahasynths to: Channel dedicated to questions and discussion of Yamaha FM Synthesizer internals and corresponding REing. Discussion of synthesis methods similar to the Yamaha line of chips, Sound Blasters + clones, PCM chips like RF5C68, CD/floppy disk theory of operation, and the 68k CPU are also on-topic. Channel logs: https://libera.irclog.whitequark.org/~h~yamahasynths
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<cr1901>
Random thing I'm reminded of: In the 70s/80s, there was a chip you could buy from Radio Shack that was a 6800-something that implemented a speech recognition firmware. It could recognize "up", "down", "left", "right", "on", "off". Anyone know which chip I'm talking about and whether the firmware was ever decapped?
<theunixman>
I had that chip...
<cr1901>
Do you remember the name of it?
<cr1901>
Well regardless, good that someone can vouch that I didn't make it up
<cr1901>
That was probably the vid I learned it from back when I watched him
<theunixman>
hah yeah!
<theunixman>
I built a basic repeater with that and with the speech generator they sold too...
<theunixman>
it was pretty advanced for the time, it actually modeled the vocal tract.
<cr1901>
But yes, thank you that was the chip I was looking for.
<cr1901>
> it actually modeled the vocal tract
<theunixman>
but, well, that was all you really could do because there wasn't enough onboard memory to do samples.
<cr1901>
That's why I'm interested in it... I took speech synthesis _years_ ago and tho I'm not good at it, I'm still curious about early recognition
<cr1901>
and the vocal tract/cepstrum/quefrency BS is what you did back then
<theunixman>
hah yeah it is.
<cr1901>
(I have my textbook on it somewhere...)
<theunixman>
I think the one with the vocal tract model was the speech generation chip... SP0256
<theunixman>
they weren't at all a matched pair but well nothing really was then.
<theunixman>
wow... all these weird memories hahaha
<cr1901>
I thought I had my old textbook. Well, maybe I do, but the one I found seems more advanced than I remember (seems to assume familiarity with "quefrency alanysis")