Doepfer A-111-5 Synthesizer Voice - Manual (Page 2)

Synthesizer Voice A-111-5 System A-100 DOEPFER
2
Module A-111-5 is a complete monophonic synthesizer
module that includes these components:
VCO
• manual tune control (with an internal jumper the range
can be set to ~ +/-1 half an octave or ~ +/-2.5 octaves)
• range switch -1 / 0 / +1 octave
• frequency range about 10Hz ... 12kHz
• FM (frequency modulation) control with modulation
source switch (LFO1 / off / ADSR)
• manual pulsewidth control for rectangle waveform
• PWM control with modulation source switch (LFO2 / off
/ ADSR)
• waveform switch (sawtooth / off / triangle)
• the sum of the waveform chosen by this switch and the
rectangle is fed into the VCF (to turn the rectangle off
the PW control has to be set fully CCW)
• external CV input for VCO frequency (1V/octave)
• external CV input for external PWM of the rectangle
• internal CV input for frequency (1V/octave) connected
to the A-100 bus via jumper, the jumper can be used to
interrupt this internal connection if not wanted
VCF
• 24 dB low pass
• ~ 12 octaves frequency range
• manual frequency control
• tracking switch half - off - full (internally connected to
the external frequency CV input of the VCO, i.e. the
VCF tracks to the VCO if the switch is set to "half" or
"full" position)
• XM: exponential FM (frequency modulation) control
with modulation source switch (LFO2 / off / ADSR)
• LM: linear FM (frequency modulation) control to
modulate the VCF by the triangle of the VCO in a linear
(!) manner
• manual resonance control (up to self oscillation)
• external audio input (this signal is added to the VCO
signal)
• external CV input for filter frequency
• 1V/octave tracking for usage of the VCF as a sine
wave oscillator (not as precise as the VCO but much
better than most of the other filters)