Doepfer A-135-2v Manual
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A-135-2v
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Side 1/3

DOEPFER MUSIKELEKTRONIK GMBH
DOEPFER MUSIKELEKTRONIK GMBH
DOEPFER MUSIKELEKTRONIK GMBH
DOEPFER MUSIKELEKTRONIK GMBH DOEPFER MUSIKELEKTRONIK GMBH
A-135-2 Quad VCA / Voltage Controlled Mixer
Position and function of the jumpers and connectors Board A
The pin headers JP4, JP5, JP6 and JP7 are used to determine the control voltages for the VCAs 2-4:
JP4: VCA2 control
jumper in upper position Æ VCA2 is controlled by CV2 (factory setting)
jumper in lower position Æ VCA2 is controlled by CV1 (in this case CV2 does not affect VCA2)
JP5: VCA3 control
jumper in upper position Æ VCA3 is controlled by CV3 (factory setting)
jumper in lower position Æ VCA3 is controlled by CV1 (in this case CV3 does not affect VCA3)
JP6: VCA4 control
jumper in upper position Æ VCA4 is controlled by CV4 (factory setting)
jumper in lower position Æ VCA4 is controlled by CV1 (in this case CV4 does not affect VCA3)
JP7: alternative VCA4 control
jumper installed Æ VCA4 is controlled by CV2 (used for "Stereo" mode)
In this case the jumper on JP6 has to be removed !
JP4: VCA2 control
Bus connector
(colored stripe left)
JP5: VCA3 control
JP6: VCA4 control
JP7: alternative
VCA4 control

Applications of the different jumper settings
Remark: under all conditions VCA1 is controlled by control unit 1.
This is the standard configuration:
• JP4, JP5 and JP6 are installed in the upper position
• no jumper is installed on JP7
In this case each VCA has it's own control unit.
"Stereo" configuration:
• JP4 is installed in the upper position (VCA2 is controlled by CV2)
• JP5 is installed in the lower position (VCA3 is controlled by CV1)
• JP6 is removed
• JP7 is installed (VCA4 is controlled by CV2)
In this configuration VCA1 and VCA3 are controlled by CV1, VCA2 and VCA4 are controlled by CV2.
The control units 3 and 4 have no meaning in this confuguration.
Special configuration (all four VCAs are controlled by CV1):
• JP4, JP5 and JP6 are installed in the lower position
• no jumper is installed on JP7
In this configuration all four VCAs are controlled by CV1. The control units 2, 3 and 4 have no meaning in this
application. This configuration is used when four different audio or control signals have to be controlled
simultaneously (e.g the level of four VCOs, four LFOs, four envelope generators and so on). It's the same
function as the obsolete quad VCA module A-132-2.
Produkt Specifikationer
Mærke: | Doepfer |
Kategori: | Ikke kategoriseret |
Model: | A-135-2v |
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