C101 OTA
LOW Pass Filter MKII
USER MANUAL
OTA LOWPASS FILTER
MKII
0
1
2
3
4
5
6
7
8
9
10
FREQUENCY
C101
1V / OCT
24dB OUT
6dB OUT
RESONANCE
-5
-4
-3
-2
-1
+1
+2
+3
+4
+5
LEVEL
RES MOD
MIN
MAX
INPUT 2
INPUT 1
ENV IN
FM IN
Page 1: ...R MANUAL OTA LOWPASS FILTER MKII 0 1 2 3 4 5 6 7 8 9 10 FREQUENCY C101 1V OCT 24dB OUT 6dB OUT RESONANCE 0 1 2 3 4 5 6 7 8 9 10 5 4 3 2 1 0 1 2 3 4 5 LEVEL RES MOD LEVEL MIN MAX INPUT 2 INPUT 1 ENV IN FM IN LEVEL MIN MAX LEVEL MIN MAX ...
Page 2: ...envelopes the input response can be changed to 1V Octave with a jumper located on the back of the module An inverter switch has been added to easily invert the input signal A better gain compensation circuit for the 24db output Not more volume drop when you turn up the resonance An attenuverter has been added to the resonance modulation input Better temperature compensation At high resonance setti...
Page 3: ...1 ENV IN FM IN LEVEL MIN MAX LEVEL MIN MAX Cutoff frequency control Resonance control Resonance modulation input Modulation level control Modulation level control Audio input 2 level 6db filter ouput Cutoff frequency modulation input Modulation level control Cutoff frequency modulation input envelope Audio input 1 Audio input 2 Cutoff frequency 1V OCT input C101 OTA LowPass Filter MkII Front Panel...
Page 4: ...This control sets the resonance level Above 9 position the filter will self oscillate with a frequency defined by the frequency con trol The generated waveform is a very pure sine wave that can be used as sound source 1V OCT Exponential control voltage for cutoff frequency When the filter is set to auto oscillation this input allow the filter to be used as a VCO The tracking will be perfect in mor...
Page 5: ...s This input has 0 66V Octave response getting this way a 7 5 octaves modulation range using a 5V envelo pe The response can be changed with a jumper located on the back of the module to the typical 1V Octave The LEVEL potentio meter set the amount of modulation The polarity switch allows to invert the modulation signal The input allow positive and negati ve signals which together with the value s...
Page 6: ...CORSYNTH C101 OTA LOWPASS FIL TER mk II 5 HTTP WWW CORSYNTH COM 6dB OUT 6db OUT Filter output with 6db octave response 24dB OUT 24db OUT Filter output with 24db octave response ...
Page 7: ...k II 6 HTTP WWW CORSYNTH COM BLOCK DIAGRAM LEVEL INPUT 2 INPUT 1 LEVEL LEVEL FM IN ENV 1 FREQUENCY 1V OCT 6db OUT LEVEL RES MOD RESONANCE OTA LOwPASS FIL TER IN 6 db RESONANCE CUTOFF FREQUENCY 24 db 24 db OUT Audio signal Control signal ...
Page 8: ...05 inches Power 15V 35mA 15V 33mA Power connectors Synthesizers com MOTM 4 pin Signal level Envelope 5Vpp 0V 5V Bipolar 10Vpp 5V TECHNICAL DATA 15V 5V 15V N C GND Synthesizers com GND 15V 15V GND MOTM IMPORTANT This module has two power connec tors Synthesizers com and MOTM Only one is needed to power the module Synthesizers com or MOTM Never connect both at the same time 1V OCT Trimmer Frequency ...
Page 9: ...CORSYNTH C101 OTA LOWPASS FIL TER mk II 8 HTTP WWW CORSYNTH COM MODULAR LEVEL MIN MAX MODULAR SYNTHS ...
