![]() It would have been much more productive to write a quick python script. I have a horrible feeling that I generated the TomsDiner script by running that binary string through a series of reg-ex search and replaces until it was a C formatted hex array. Thats the reason for the 'rev' function in the Talkie code. (When I was coding Talkie, the available speech ROMs were inconsistent in bit order. You can pad out the bits of the final byte with '0's or '1's - it doesn't matter. Ī quick test should make it obvious which is which. Adafruit's Wave Shield is a good start (although I prefer to use on-chip PWM instead of an external ADC). an SD card) and a WAV file might be more appropriate to your purposes. ![]() Neither of those are trivial jobs, but they could be achieved. Those rules could be ported to Arduino, and would give an infinite vocabulary synthesiser in about 8Kbytes - but it is a lot of work. Unfortunately its written in Graphics Programming Language, which is poorly documented and has no good reverse engineering tools. There is another option - the TI-99/4A cartridge 'Terminal Emulator II' includes an English -> Phoneme -> TMS5220 bitstream mapper that uses a set of rules to pronounce any word. ![]() The best source for the coefficient mapping on the TMS5220 is probably the emulator used by the MAME project, which was the inspiration for Talkie. In fact most LPC 10 pole 8kHz codecs could be ported to Talkie, given the time and expertise. Not ideal, but probably enough for a DSP coder to produce something usable. That is publicly available, with source - but the official distribution is machine translated from FORTRAN and it shows. It looks like LPC-10 uses a very similar algorithm, with different coefficient encoding and bit mapping. Any 8kHz 16bit mono WAV should work the same way. ![]() Get Freemat running, and run the 'romgen' file. I'm not happy with it - the pitch detection makes some bad mistakes, often off by an octave - but its the best I could come up with at the time. The encoder section of the repo contains the code I used to encode the Toms Diner example. If not, try bit reversing each byte, as there is no standard way of mapping bits to bytes on those ROMs) (If you find other ROMs, the speech strings should work as is. I'm not aware of any open source encoders - just some old hacked DOS versions that I've never managed to get running. The examples (with the exception of Tom's Diner) are extracted from commercial ROMs mastered by the Texas Instruments mastering hardware, for the TMS5220 family of chips. Simplify the equation to get the general equation:Ġ = 0.2 x − y 14 \small 0 = 0.2x - y 14 0 = 0.Adding words is tricky. Now, input the values into the point-slope formula: The characteristic point is 20 pounds on 30th day: (x 1, y 1) = (30, 20) The slope is the change of weight per day: m = 0.2 Find the general equation of the puppy's growth. It grew 0.2 pounds every day, and after 30 days, he was 20 pounds. Let's solve an exercise with a more relatable subject. Now, you can check your result with our point-slope form calculator. 0 = 2 x − y − 7 \small 0 = 2x - y - 7 0 = 2 x − y − 7Īnd you have the answer.Input the values into the point-slope form formula:.What is the general equation of the line? Let's have a look at two exercises, to understand the topic more clearly.
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