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VCF 1 Resonance

2

1

VCF 1 Frequency

Vary 1 Control 

VCF 1 Mode 

Freq CV 1 Level

INPUT 1 Level

VCF 1 Output

VCF 1 RES CV

1V/Oct Input

VCF 1 FCV IN

VCF 1 Input

VCF 1 LP Out

VCF 1 BP Out

VCF 1 HP Out

VCF 2 Resonance

VCF 2 Frequency

Vary 2 Control 

VCF 2 Mode 

Freq CV 2 Level

INPUT 2  Level

VCF 2 Output

VCF 2 RES CV

1V/Oct Input

VCF 2 FCV IN

VCF 2 Input

VCF 2 LP Out

VCF 2 BP Out

VCF 2 HP Out

6

7

5

4

3

14

13

12

11

10

9

8

5

4

3

10

2

1

6

11

12

13

14

7

8

9

Audio Mix

16

15

Dual/Cascade

D-FCV Level 

D-FCV Mix 

Invert Switch

D-FCV Input

Dual Output

MIX CV Input

20

21

19

18

17

22

VCF 1  

MIXING  BUS  

VCF 2  

Front panel controls

Содержание Gemini 2412

Страница 1: ...ix of VCF1 OUT 1 against VCF2 OUT 2 is controlled by the setting of the Audio Mix control with the output routed to the D OUT jack Dual Parallel INVERTED Mode this is the same as Dual mode however the...

Страница 2: ...Cascade switch This connection is made using the internal switch on the IN 2 jack socket and is connected if no jack socket is connected but if a patch cable is insered into IN 2 then this connection...

Страница 3: ...ance VCF 2 Frequency Vary 2 Control VCF 2 Mode Freq CV 2 Level INPUT 2 Level VCF 2 Output VCF 2 RES CV 1V Oct Input VCF 2 FCV IN VCF 2 Input VCF 2 LP Out VCF 2 BP Out VCF 2 HP Out 6 7 5 4 3 14 13 12 1...

Страница 4: ...with this control setting so in this case it acts as a offset control 5 VCF MODE Switch This selects the filter type that is routed to the OUT jack 7 and to the central mixing bus 6 INPUT Level This i...

Страница 5: ...rates from a VCO The accepted signal range is 5V to 5V Any voltages higher or lower than this will be capped to 5 or 5V Maximum permissible voltage to this input is 12V 13 BP Output This is the Band...

Страница 6: ...cted in Dual Parallel or Cascade Series DUAL VCF 1 input is normalised to VCF 2 input so that the same signal is presented to both filters and the AUDIO MIX control 15 cross fades between the outputs...

Страница 7: ...re the two VCF s are mixed together This is the only output that combines the mix of VCF 1 and VCF 2 so to use the DUAL CASCADED and DUAL INVERTED modes this jack must be used as the output All of the...

Страница 8: ...f oscillation jumpers There are a few points to note about self oscillation mode 1 Because we have to force the circuitry into self oscillation the resulting signal level is quite high around 19V p p...

Страница 9: ...ale buffer can be a useful addition if the self oscillation mode is used often and accurate 1V Octave scaling is required it allows scaling to be adjusted from the front panel without having to remove...

Страница 10: ...of the Envelope CV so it will close down rather than open up the filter cutoff point The bass voice is fed to Gemini VCF 2 from the lower VCO This time on the Gemini we are using the OUT 2 jack and th...

Страница 11: ...F 1 and VCF 2 are set to Band Pass and have quite a large amount of resonance added we get some classic vowel sounds and sweeping between the filters gives interesting tonal variation Try different se...

Страница 12: ...D FCV Mix control at mid point so that the D FVC control signal is being sent equally to VCF 1 and VCF 2 We have also included a variant on this patch lower picture which shows the inverse output from...

Страница 13: ...lockwise from zero to 10 fades between single 12dB LP configuration VCF 1 only and 24dB configuration VCF 1 and VCF 2 cascaded in series You will not that the 24dB setting sounds duller and less brigh...

Страница 14: ...ired panning range We have also shown a dual envelope generator to control the cutoff of each filter individually obviously this is optional and and is shown as one of many modulation possibilities Pl...

Страница 15: ...lly a Linear or Hybrid suppy Also there are a few Eurorack modules which are badly behaved and can introduce noise back onto onto the Eurorack power rails too the way to find these is to disconnect al...

Страница 16: ...s then test tracking again E Scale 2 This trimmer adjusts the 1V Octave tracking of VCF 2 Turning it anti clockwise reduces shortens the scaling and turning clockwise increases scaling Note For use by...

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