[sdiy] Electronotes waveshaper thingie

[Ian Smith]

Hey all,

It's me again with my wild ideas. This one isn't quite so wild... really. I was peering through my stack of Electronotes and saw Bill Anderson's waveshaper in EN#7 pgs. 7-8. I had found an older 4 bit RAM chip over at Futurlec earlier and worked out the necessary adjustments to replace the NOR gate memory in the article with the RAM chip. The result: storage and playback of up to 16 user created waveforms of 64 words each. And once again, I have a question. In the article, Bill calls for a clocking oscillator at 12 times the desired frequency due to the 12 words of the design. I'll need one that is 64 times the frequency for the 64 words. Not too much of a problem. Would you suggest using a crystal based oscillator or would a standard analog oscillator work, just modify it to crank out the higher frequency range? And what about voltage control of the clock oscillator frequency? would a standard CV signal need to be modified in anyway because of the multiplied frequency? And the last question, this thing puts out a stairsteped wave and needs a LPF to smooth it out... any particular frequency that that filter should be?

Thanks everyone,

-Ian Smith

_________________________________________________________________
Rediscover Hotmail®: Get e-mail storage that grows with you. 
http://windowslive.com/RediscoverHotmail?ocid=TXT_TAGLM_WL_HM_Rediscover_Storage2_042009