Paia 9308 Assembly And Using Manual Download Page 4

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FatMan MIDI Synth

94.7.22

Fig 5a. An 8031 uProcessor provides the computing horsepower needed to

decode MIDI and keep Control Voltages straight. Equally tempered Control

Voltages are provided by the combination of the DAC and Octave Range

switching.

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Summary of Contents for 9308

Page 1: ...rns from the past by including features that were eccentricities of classic synths such as a unique punch switch that adds a subtle but useful fifth segment to the standard ADSR response c 2000 PAiA E...

Page 2: ...5 15 10k brown black orange R6 R7 R8 R9 R29 R30 R46 R55 R67 R76 R77 R79 R86 R101 R106 1 100k brown black yellow R57 2 10 megohm brown black blue R41 R100 1 120 ohm brown red brown R22 5 12k brown red...

Page 3: ...ing to the octave below 6V which is 3V plus the voltage required to produce the next semi tone up Since in equal temperament each semi tone has a frequency 1 059 times the preceding semi tone and sinc...

Page 4: ...computing horsepower needed to decode MIDI and keep Control Voltages straight Equally tempered Control Voltages are provided by the combination of the DAC and Octave Range switching c 2000 PAiA Elect...

Page 5: ...of the uP Voltage on the capacitor is buffered by IC12 c and the comparator IC8 c monitors the buffer s voltage and switches the processor s INT1 input when the peak voltage is reached The firmware s...

Page 6: ...7 22 Fig 5b The FatMan analog circuitry comporises two VCOs low pass VCF with AR Transient Generator and VCA with ADSR Transient Generator c 2000 PAiA Electronics Inc Fair use copy with this notice on...