{"product_id":"doepfer-a-126-2-voltage-controlled-frequency-shifter-ii","title":"Doepfer - A-126-2 Voltage Controlled Frequency Shifter II","description":"\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/rAZyecPwHGQ\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\u003cp data-mce-fragment=\"1\"\u003eModule A-126-2 is a fully analog frequency shifter for audio signals.\u003c\/p\u003e \u003cp data-mce-fragment=\"1\"\u003eA frequency shifter is an audio processing unit that shifts each frequency of the incoming audio signal by the same frequency. If the shifting frequency is e.g. 200Hz an incoming audio frequency of 1000 Hz becomes 1200 Hz, 2000Hz becomes 2200 Hz, 3000 Hz becomes 3200 Hz and so on. Pay attention that this is different from pitch shifting where all frequencies are shifted proportional (e.g. 1000\u0026gt;1200Hz, 2000\u0026gt;2400Hz, 3000\u0026gt;3600Hz) !\u003c\/p\u003e \u003cp data-mce-fragment=\"1\"\u003eThe frequency range of the internal quadrature VCO is about 8 octaves (about 20Hz ... 5kHz). If required an external quadrature VCO can be used.\u003c\/p\u003e \u003cp data-mce-fragment=\"1\"\u003eThe module is equipped with these controls, inputs and outputs:\u003c\/p\u003e \u003cul data-mce-fragment=\"1\"\u003e \u003cli data-mce-fragment=\"1\"\u003e \u003cstrong data-mce-fragment=\"1\"\u003eFrequ. 1\u003c\/strong\u003e: first manual control of the shifting frequency (factory setting: coarse, range about 20Hz - 5 kHz)\u003c\/li\u003e \u003cli data-mce-fragment=\"1\"\u003e \u003cstrong data-mce-fragment=\"1\"\u003eFrequ. 2\u003c\/strong\u003e: second manual control of the shifting frequency (factory setting: fine)\u003c\/li\u003e \u003cli data-mce-fragment=\"1\"\u003eby means of internal jumpers the sensitivity of Frequ.1 and 2 can be swapped (i.e. Frequ.1 = fine and Frequ.2 = coarse)\u003c\/li\u003e \u003cli data-mce-fragment=\"1\"\u003ethe relation between coarse and fine control is about 25:1 (corresponds to about 8 octave to 1\/3 octave)\u003c\/li\u003e \u003cli data-mce-fragment=\"1\"\u003e \u003cstrong data-mce-fragment=\"1\"\u003eFCV In\u003c\/strong\u003e (socket) and \u003cstrong data-mce-fragment=\"1\"\u003eFCV \u003c\/strong\u003e(small control without knob): control voltage input with attenuator for the external voltage control of the shifting frequency\u003c\/li\u003e \u003cli data-mce-fragment=\"1\"\u003e \u003cstrong data-mce-fragment=\"1\"\u003eMix\u003c\/strong\u003e: manual control of the up\/down shift panning unit, fully CCW = down shift, fully CW = up shift, in between a mixture of down and up \u003c\/li\u003e \u003cli data-mce-fragment=\"1\"\u003e \u003cstrong data-mce-fragment=\"1\"\u003eMix CV In \u003c\/strong\u003e(socket) and \u003cstrong data-mce-fragment=\"1\"\u003eMix CV \u003c\/strong\u003e(small control without knob): control voltage input with attenuator for the mixing unit for external voltage control of the up\/down mixing\u003c\/li\u003e \u003cli data-mce-fragment=\"1\"\u003e \u003cstrong data-mce-fragment=\"1\"\u003eAudio In \u003c\/strong\u003e(socket), \u003cstrong data-mce-fragment=\"1\"\u003eLevel \u003c\/strong\u003e(small control without knob) and \u003cstrong data-mce-fragment=\"1\"\u003eOverload\u003c\/strong\u003e (LED): audio input with attenuator, typ. audio in level = 1Vpp, the level control has to be adjusted so that the overload LED just begins to light up a bit, when the LED is fully on clipping\/distortion occurs, when the LED is permanently off the input level is too low and the signal-to-noise ratio increases\u003c\/li\u003e \u003cli data-mce-fragment=\"1\"\u003e \u003cstrong data-mce-fragment=\"1\"\u003eAudio Out \u003c\/strong\u003e(socket): audio output of the frequency shifter\u003c\/li\u003e \u003cli data-mce-fragment=\"1\"\u003e \u003cstrong data-mce-fragment=\"1\"\u003eSquelch \u003c\/strong\u003e(small control without knob): controls the squelch function: fully CCW (Env.) the output VCA is controlled by the envelope signal, which is derived from the audio input signal, fully CW (open) the output VCA is permanently open (no squelch function),  in between the squelch intensity can be adjusted\u003c\/li\u003e \u003cli data-mce-fragment=\"1\"\u003e \u003cstrong data-mce-fragment=\"1\"\u003eQuadrature VCO Outputs \u003c\/strong\u003e(sockets \u003cstrong data-mce-fragment=\"1\"\u003e Sin\u003c\/strong\u003e and \u003cstrong data-mce-fragment=\"1\"\u003eCos\u003c\/strong\u003e): outputs of the internal quadrature oscillator, about 12Vpp level (+6V\/-6V)\u003c\/li\u003e \u003cli data-mce-fragment=\"1\"\u003eExt. Inputs \u003cstrong data-mce-fragment=\"1\"\u003eSin \u003c\/strong\u003eand \u003cstrong data-mce-fragment=\"1\"\u003eCos \u003c\/strong\u003e(sockets): required when an external quadrature VCO (e.g. A-143-9 with a wider range or A-110-4 with thru zero feature or A-110-6 with different waveforms) is used instead of the internal quadrature VCO, the levels of the externalVCO should be about 10Vpp (8...10Vpp are OK) and the signals have to be symmetrical around zero Volts, the sockets are normalled to the internal quadrature VCO (i.e. the sockets are equipped with switching contacts that interrupt the internal connection as soon as a plug inserted)\u003c\/li\u003e \u003cli data-mce-fragment=\"1\"\u003e \u003cstrong data-mce-fragment=\"1\"\u003eVCA ext. CV \u003c\/strong\u003e(socket): used when an external control voltage (e.g. from an envelope generator) should be used to control the output VCA instead of the internal squelch unit, the socket is normalled to the output of the Squelch control (i.e. the socket is  equipped with a switching contact that interrupts the internal squelch connection as soon as a plug inserted). From about +8V external control voltage the VCA is fully open.\u003c\/li\u003e \u003cli data-mce-fragment=\"1\"\u003eInternal terminals (pin headers, e.g. for a DIY breakout module): \u003cul data-mce-fragment=\"1\"\u003e \u003cli data-mce-fragment=\"1\"\u003eenvelope follower output \u003c\/li\u003e \u003cli data-mce-fragment=\"1\"\u003edome filter output 1\u003c\/li\u003e \u003cli data-mce-fragment=\"1\"\u003edome filter output 2\u003c\/li\u003e \u003cli data-mce-fragment=\"1\"\u003ering modulator 1 output\u003c\/li\u003e \u003cli data-mce-fragment=\"1\"\u003ering modulator 2 output\u003c\/li\u003e \u003cli data-mce-fragment=\"1\"\u003eUp shift output\u003c\/li\u003e \u003cli data-mce-fragment=\"1\"\u003eDown shift output\u003c\/li\u003e \u003c\/ul\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003chr class=\"line\" data-mce-fragment=\"1\"\u003eHP : 8","brand":"Doepfer","offers":[{"title":"Default Title","offer_id":54725867897173,"sku":null,"price":216.55,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1071\/1872\/3413\/files\/a-126-2.jpg?v=1787441667","url":"https:\/\/climivor.myshopify.com\/products\/doepfer-a-126-2-voltage-controlled-frequency-shifter-ii","provider":"CLIMIVOR","version":"1.0","type":"link"}