DOEPFER A-100CGK Betriebsanweisung PDF herunterladen (Seite 11)

User's Guide page 11 DIY Synth Kit

JP2: VCO and VCF connections

JP2 contains some VCO and VCF terminals.

ribbon cable pin header top view

Function Explanation Remark / Recommendation

VCO PW CV2 Control voltage input #2 for

rectangle pulsewidth

Range about 0…+5V, recommended for

PWM input (socket with attenuator)

VCO PW CV1 Control voltage input #1 for

rectangle pulsewidth

Range about 0…+5V, recommended for

PW manual control

VCO PW CV SUM Control voltage summing

input for rectangle

pulsewidth

Required only if the number of CV inputs

for pulsewidth has to be increased, serial

resistor 100k recommended for 0…+5V

VCO RECT VCO rectangle output about 5V level (+/- 2.5V), DC coupled

VCO CV1 Control voltage input #1 for

VCO frequency

Sensitivity: 1V/octave, e.g. for manual

frequency control

VCO CV SUM Control voltage summing

input for VCO frequency

Required only if the number of frequency

CV inputs is not sufficient, serial resistor

100k required for 1V/octave

VCO CV3 Control voltage input #3 for

VCO frequency

Sensitivity: 1V/octave, e.g. for CV input

socket

VCO CV4 Control voltage input #4 for

VCO frequency

Sensitivity: 1V/octave, e.g. for CV input

socket

VCO CV2 Control voltage input #2 for

VCO frequency

Sensitivity: 1V/octave, e.g. for FM input

(socket with attenuator)

VCO SAW VCO sawtooth output about 6V level (+/- 3V), AC coupled

VCO SYNC Hard Sync Input Negative slope causes a sawtooth reset

(rectangle or sawtooth input required,

min. level 5V required)

2 x GND

VCF RES IN VCF resonance connector Has to be wired to the VCF Bandpass

output via attenuator (resonance control,

recommended value 50...100k linear)

VCF AUDIO IN VCF audio input Usually connected to one of the VCO

outputs via attenuator (for clipping/

distortion control), if both VCO

waveforms have to be mixed the VCF

AUDIO SUM has to be used (see JP7)

VCF BANDPASS VCF bandpass Output Usually connected to a socket labelled

"VCF Bandpass", also required for

resonance control (VCF RES IN)

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 23 24

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