{"product_id":"doepfer-a-135-2v-quad-vca-vc-mixer","title":"DOEPFER A-135-2V QUAD VCA - VC MIXER","description":"\u003ctable border=\"0\" cellpadding=\"4\" bgcolor=\"#FFFFFF\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\" valign=\"top\"\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000; font-family: Arial; font-size: small;\"\u003eA-135-2 is a miniature version of the \u003ca href=\"http:\/\/www.doepfer.de\/a135.htm\"\u003eA-135-1\u003c\/a\u003e. Behind a front panel with 8 HP only four linear VCAs (voltage controlled amplifiers) and a voltage controlled mixer based on the VCAs are available.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000; font-family: Arial; font-size: small;\"\u003eControls, In\/Outputs and Functions of each VCA:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000; font-family: Arial; font-size: small;\"\u003eLevel (manual control of the VCA amplification), small rubberized knob (L1...L4) \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000; font-family: Arial; font-size: small;\"\u003eControl voltage input with associated attenuator (CV1...CV4), for the full VCA control range about 0...+5V control voltage are required (attenuator fully clockwise), for higher control voltages the attenuator is used, the attenuators are without knobs, just plastic shafts with white marker\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000; font-family: Arial; font-size: small;\"\u003eSignal Input\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000; font-family: Arial; font-size: small;\"\u003eSignal Output\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000; font-family: Arial; font-size: small;\"\u003eAll inputs and outputs are DC coupled. Consequently the VCAs can be used to process both audio and control voltages (e.g. to control the level of LFOs or envelopes)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eThe signal input is not equipped with an attenuator. But the VCAs can process all signals up to 15Vpp \/ -7.5...+7.5V without clipping. In case of higher levels an external attenuator is required (e.g. \u003ca href=\"http:\/\/www.doepfer.de\/a1831.htm\"\u003eA-183-1\u003c\/a\u003e). \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000; font-family: Arial; font-size: small;\"\u003eThe available amplification range is  0...1, the maximal amplification is 1 (i.e. it \"clips\" and remains at 1 even if the control voltage goes beyond the value that corresponds to amplification 1)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000; font-family: Arial; font-size: small;\"\u003eFunctions of the voltage controlled mixers:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000; font-family: Arial; font-size: small;\"\u003etwo outputs (\"Selected\" and \"All\")\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eSelected output: the ouput if a \u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eVCA is removed from this sum signal when a plug is inserted into the corresponding VCA output.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eAll output: sum of all VCA outputs, regardless of \u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003einserted plugs into the VCA outputs\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000; font-family: Arial; font-size: small;\"\u003eThe maximal amplification is  about 0.6 to avoid clipping at the mixer outputs (otherwise the outputs may distort with 15Vpp signals at each signal input and full amplifications)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000; font-family: Arial; font-size: small;\"\u003eSpecial functions of the voltage controlled mixer (selectable by internal jumpers)\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000; font-family: Arial; font-size: small;\"\u003eDual Stereo VCA: In this case the control unit of VCA1 (L1 + CV1) affects also VCA3 and the control unit of VCA2 (L2 + CV2) affects also VCA4. The control units of \u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eVCA3 (L3 + CV3)\u003c\/span\u003e\u003cspan style=\"color: #000000; font-family: Arial; font-size: small;\"\u003e and \u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eVCA4 (L4 +CV4)\u003c\/span\u003e\u003cspan style=\"color: #000000; font-family: Arial; font-size: small;\"\u003e are out of operation\u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000; font-family: Arial; font-size: small;\"\u003eQuad VCA: In this case the control unit of VCA1 (L1 + CV1) affects all four VCAs. The control units of VCA2, VCA3 and VCA4 are out of operation. In this mode the module has the same function as module \u003ca href=\"http:\/\/www.doepfer.de\/a1322.htm\"\u003eA-132-2\u003c\/a\u003e. That's why module A-132-2 will be discontinued.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000; font-family: Arial; font-size: small;\"\u003eNormalling of the signal inputs: by means of internal jumpers signal input 1 can be normalled to signal input 2, signal input 2 to signal input 3 and signal input 3 to signal input In 4. That way the same input signal can be distributed to four different channels by means of control voltages (e.g. quadrophonic distribution of audio signals). Suitable control voltage sources are e.g. \u003ca href=\"http:\/\/www.doepfer.de\/a144.htm\"\u003eA-144\u003c\/a\u003e (Morphing Controller) or \u003ca href=\"http:\/\/www.doepfer.de\/a1439.htm\"\u003eA-143-9\u003c\/a\u003e (Quadrature LFO).\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000; font-family: Arial; font-size: small;\"\u003eThe following document shows the positions and functions of the jumpers of the module: \u003ca href=\"http:\/\/www.doepfer.de\/a100_man\/A135_2_jumpers.pdf\"\u003eA135_2_jumpers.pdf\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\u003chr noshade size=\"1\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\" align=\"left\" valign=\"top\" height=\"16\"\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eBreite\/Width: 8 TE \/ 8 HP \/ 40.3 mm\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"color: #000000; font-family: Arial; font-size: small;\"\u003eTiefe\/Depth: 45 mm (gemessen ab der Rückseite der Frontplatte \/ measured from the rear side of the front panel)\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eStrombedarf\/Current: +40mA (+12V) \/ -40mA (-12V)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"DOEPFER","offers":[{"title":"Default Title","offer_id":41347585245357,"sku":"doepfer_a_135-2v","price":190.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3449\/7197\/products\/a-135-2v.jpg?v=1645058787","url":"https:\/\/www.detroitmodular.live\/products\/doepfer-a-135-2v-quad-vca-vc-mixer","provider":"Detroit Modular","version":"1.0","type":"link"}