Doepfer A-126-2 Frequency Shifter Eurorack Module

 Doepfer A-126-2 Frequency Shifter Eurorack Module

Doepfer A-126-2 Frequency Shifter Eurorack Module

VOLTAGE CONTROLLED FREQUENCY SHIFTER
 
Module A-126-2 is a fully analog frequency shifter for audio signals. A 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>1200Hz, 2000>2400Hz, 3000>3600Hz) !
The frequency range of the internal quadrature VCO is about 8 octaves (about 20Hz … 5kHz). If required an external quadrature VCO can be uséd.

Features

  • Frequ. 1: first manual control of the shifting frequency (factory setting: coarse, range about 20Hz – 5 kHz)
  • Frequ. 2: second manual control of the shifting frequency (factory setting: fine)
  • By means of internal jumpers the sensitivity of Frequ.1 and 2 can be swapped (i.e. Frequ.1 = fine and Frequ.2 = coarse)
  • The relation between coarse and fine control is about 25:1 (corresponding to about 8 octaves to 1/3 octave)
  • FCV In (socket) and FCV (small control without knob): control voltage input with attenuator for the external voltage control of the shifting frequency
  • Mix: 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 
  • Mix CV In (socket) and Mix CV (small control without knob): control voltage input with attenuator for the mixing unit for external voltage control of the up/down mixing
  • Audio In (socket), Level (small control without knob) and Overload (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
  • Audio Out (socket): audio output of the frequency shifter
  • Squelch (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
  • Quadrature VCO Outputs (sockets Sin and Cos): outputs of the internal quadrature oscillator, about 12Vpp level (+6V/-6V)
  • Ext. Inputs Sin and Cos (sockets): required when an external quadrature VCO (e.g. A-143-9 with a wider frequency range or A-110-4 with thru zero feature or A-110-6 with different waveforms) is uséd instead of the internal quadrature VCO, the levels of the external VCO 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)
  • VCA ext. CV (socket): uséd when an external control voltage (e.g. from an envelope generator) should be uséd 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.
  • Internal terminals (single pin headers for the connection to the expansion module A-126-2Exp or own DIY applications):
    • Envelope follower output 
    • Dome filter output 1
    • Dome filter output 2
    • Ring modulator 1 output
    • Ring modulator 2 output
    • Up shift output
    • Down shift output
    • Audio Input #2 for feedback effects (available only from version 2 of the module early in 2022)
    • GND

Specifications

  • 80 mA +12V
  • 70 mA -12V
  • Width: 8HP
  • Depth: 60mm


RETURNS

The majority of items that we sell are covered by the Distance Selling Regulations in the UK which gives you 30 working days from receipt of the goods to cancel the contract and return them. There are some items which are not covered by the DSR's including Software and Hardware that includes Software needed for it's operation and Music items (Records, CD's DVD's and so on), (mainly in ear headphones and microphones).

If you do wish to return an item then please contact us and we'll give you the relevant information - buyers are responsible for the cost of shipping items back to us and also for ensuring they arrive back to us in good condition. If the returned items arrive back to us in a damaged state, or the product's original box/packaging is damaged, we reserve the right to deduct an amount from the refund in order to compensate for the damage. This amount will be decided by our staff after inspection of the items.

If you have received an item and it is faulty then please get in touch straight away. We will do our utmost to sort out any problem quickly and to your satisfaction.

Where items are faulty within 7 days from date of purchase, they will be classed as an out of box failure. These items will be collected, and replaced with an identical product (subject to availability of stock).

We may ask you to post small, low cost items, such as headphones, back to us.

Any items over 30 days old will need to be returned to either our service department, the manufacturer or their appointed agent for warranty repair. We will always advise you of the return address details that you should send the goods to where this is not our normal returns address.

SHIPPING

We use different couriers depending on the size, weight and value of your equipment: Royal Mail van for smaller stuff or UPS for larger boxes. If we're using a trackable service (Courier, Tracked, Special Delivery) then we send you a tracking number by email when we ship your order so you know what to expect.

Shipping services to Mexican and Russian addresses are currently unavailable.

For courier deliveries we use a next day service (Mon - Fri only) and they get there over 99% of the time but if you need a timed service for a before 12 or before 10AM delivery then just let us know and we'll get you a reasonable quote. We can also do Saturday deliveries (on items under 2kg only) if you need something for the weekend and you've left it to the last minute (as we all do sometimes)! Northern Ireland and other non-mainland locations might be a two day service and of course the Scottish Islands may be a bit longer again.

If you've any questions before you order, please call 0141 882 9900 (Option 2) between 10AM and 5PM (Mon-Fri)

PAYMENT METHODS

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