Midifying a Speak-and-Spell
Posted 06 April 2008 - 06:42
Over the years I've gathered up some related documents, but I've never had the chance to sit down and put anything together. If I can find them I'd be happy to share them with the community.
(I couldn't find them on this machine, but I did find all of the relevant links)
Synth data sheet: http://www.gamearchi.../TI_TMS5220.pdf
General workings: http://members.tripo...v/speakell.html
Posted 09 April 2008 - 02:44
Posted 10 April 2008 - 04:28
I thought it would be neat to go a step further and replace the original processor with a PIC. I see the possibility injecting your own sound data rather than just be limit to what's in the on-board ROM.
If I was feeling really enterprising it would be a simple matter to remove the rom chips, hook them up to a parallel port, cycle through all of the addresses and read out the contents into a file, which could then be used to make custom ROMs or stored on the PIC and be used directly for playback.
Maybe dump out the contents of the speak and spell, the speak and math, and the speak and read into some kind of uber speech dictionary. Just have to burn it to a eprom, throw in a PIC to interface, and liberate the original synthesizer chip and you're all set to go.
Just some musings. I wish I had time to work on all of the projects I come up with.
Posted 11 April 2008 - 02:51
But the old school chips do have a sound that just says "robot", the newer PIC based chips are nice but for me they don't sound 'cool'. The MS sapi voices are too good, I tend to use the more robotic voices and effects because the Mary voice dry sounds too human.
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