dac en


Posted on Feb 6, 2014

The Digital-Analog-Converter fetches one of 15 parallelly pressed keyboard keys from the digital bus of the synthesizer and converts it into a control voltage (1V/Octave) and a GATE signal. The TUNE-COARSE and TUNE-FINE pots allow pitch adjustment of the voice the DAC is responsible for in polyphonic environment. The portamento pot creates a pitch


dac en
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slide from one key touch to the next. The analog part of the circuit comes from the book "Formant Pro MSS 2000" by H. J. Helmstedt, but I built only a part from it, as I don`t use wheels or key velocity. I developed the digital part of the circuit which reads the digital bus and makes the voice selection. Schematic:




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