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    AD667JN D/A converter help

    Does anyone have an idea how to make the AD667JN Digital to Analog converter simply convert data?  I really need help on this one.  I built a schematic from their datasheet, but the datasheet isn't a great source for information on the parallel output function of the AD667JN.  If it helps, I am...
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    Voltage controlled filter

    Does anyone know how to make a voltage controlled filter?  I am making a guitar effect called the auto-wah which in theory uses an envelope follower to supply the voltage to a VCF [(Voltage Controlled Filter) bandpass/lowpass/highpass filter].  The filter will change it's cutoff frequency or Q...
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