Doepfer A-110-1

Standard VCO for Modular System A-100Module A-110-1 (VCO) is a voltage controlled oscillator. The A-110-1 produces frequencies in a range of about 8 octaves, of which four waveforms are available simultaneously: pulse, sawtooth, triangle and sine wave.

The frequency of the VCO is determined by the position of the range switch and tune controller and the control voltages at the CV inputs. Thus, the VCO provides the possibility of frequency modulation. You can set the footage (octave of the fundamental) with the selector switch. The Tune control is used to fine tune the VCO frequency.

In the pulse wave the pulse width can be adjusted manually or by voltage control or modulated (PWM).

  • Width: 10 HP/ 50.5 mm
  • Depth: 55 mm (measured from the rear of the front panel)
  • Power requirements: +90 mA (+12V)/ -20 mA (-12V)
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Audio Examples

 
0:00
  • FM
  • PW
  • PW - Mod
  • PW - Mod - LFO
  • Saw
  • Sine
  • Tri

Further Information

Analog Yes
Digital No
Width 10 TE / HP
variants Doepfer

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72 Customer Ratings:
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4.5 /5
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Total
Doepfer A-110 Standard VCO
Blair, 03.11.2013
When I first became interested in modular synthesis I bought one of these, and liked it so much I bought another! The A-110 is probably the cheapest vco available, but delivers a decent audio performance, and offers a wide sound palette. It is saw-wave based, and offers another three wave shapes: sine , pulse and triangle. CV baed modulation of frequency and pulse width is available. According to the manual, the sine and triangle waveforms are not true, but derived from the saw wave. In practice all the waveforms sounded good to me. A pair of A-110's track very well together, and deliver good hard sync and FM results.

Other things I liked about the A-110:
* it was well calibrated on delivery and it achieves stable tuning within 5 minutes.
* At 10HP it is perhaps wider than it needs to be, but the control knobs are easy to use.

Room for improvement:
* The fine tuning range is not enough to tune one A-110 a musical interval above another vco, for instance a 4th or a 5th. I understand that there is a modification that can be made to the circuit board, but I feel the module should come set up this way.
* The A-110 cycles down to 15hz, which is not quite low enough to act as an LFO.

However, for the price this VCO is an absolute bargain. I bought the A-110 as a 'starter' vco, thinking I would sell or trade it when I could afford a more expensive vco. Instead I kept it, and bought another.
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A bit dull
omz , 16.01.2020
Perhaps to reinforce its marketing as a "basic VCO", it sounds quite dull: only the square wave has some character.
Triangle and saw wave sound pretty dull.
Regarding the hardware: the construction and interface feels solid overall, but the jack sockets feel low quality and poorly machined.
Overall, I don't know whether to recommend it, even to beginners. Consider instead investing a bit more in a more versatile module.
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Solid.
Abuse, 27.07.2020
Amazing oscillator! Raw and pure analog!
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The old one's are the best
Wayne M., 01.09.2013
The A-110 is still the staple VCO of many modular synths. A tried and tested design that never ceases to impress. Ideal for first timers too!
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Show variations of this product
Doepfer A-110-1
(72)
Doepfer A-110-1

Standard VCO for Modular System A-100Module A-110-1 (VCO) is a voltage controlled oscillator. The A-110-1 produces frequencies in a range of about 8 octaves, of which four waveforms are available...

  • Analog: Yes
  • Module: Yes
  • Digital: No
  • Empty Rack, Or Housing: No
  • Width: 10 TE / HP
  • variants: Doepfer
  • Basic System: No
  • Accessories: No
Doepfer A-180-2 Multiples
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Doepfer A-180-2 Multiples

Passive Multi-Port Distributor 8x Interconnected jacks, Sockets are divided into 2x quadruple groups; but can also be modified to an eight-multiple (soldering bridge on the circuit board), Width:...

  • Width: 2 TE / HP
  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
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Doepfer A-124 Wasp Filter SE

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  • Width: 8 TE / HP
  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
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Doepfer A-160-2 Clock Divider II

Frequency Divider For clock/trigger/gate signals, Width: 4 TE/ 4 HP / 20 mm

  • Width: 4 TE / HP
  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
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Doepfer A-138s Mini Stereo Mixer

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  • Modul Type: Stereo
  • Module: Yes
  • Empty Rack, Or Housing: No
  • Width: 8 TE / HP
  • Basic System: No
  • Accessories: No
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Doepfer A-180-3 Dual Buffered Multiple

Synthesizer module Double buffered 1-in-3 multiple, For buffering and duplication of CV and audio signals, Width: 4 TE / 4HP / 20.0 mm

  • Width: 4 TE / HP
  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-119
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Doepfer A-119

External Input / Envelope Follower Module A-119 is used to integrate external audio signals into the system A-100, and includes the components pre-amplifiers, envelope follower and a comparator....

  • Width: 8 TE / HP
  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-151
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Doepfer A-151

Quad Sequential Switch Module Electronic 4-position rotary switch, Trigger input, Reset input, 4 Inputs, 4 Outputs, Voltages of -8V to + 8V can be processed, Euro rack format, Width 4 HP, Depth: 35...

  • Width: 4 TE / HP
  • Switch Modul: Yes
  • CV-Editor/VC-Processor: No
  • Module: Yes
  • Tools: No
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-111-4
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Doepfer A-111-4

Quad Precision VCO Perfect for polyphonic or paraphone patches, Four precision VCOs with output mixers and a master control unit, Waveforms: Triangle, sawtooth and rectangle with individual...

  • Analog: Yes
  • Digital: No
  • Width: 18 TE / HP
  • variants: Doepfer
Doepfer A-199 Spring Reverb Module
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Doepfer A-199 Spring Reverb Module

Spring reverb module The Doepfer A-199 is a spring reverb module that via the aid of spiral springs electronically reproduces the reverb effect. Spring system with 3 separate springs, Reverb...

  • Reverb: Yes
  • Delay: No
  • Module: Yes
  • Empty Rack, Or Housing: No
  • Multieffect: No
  • Basic System: No
  • Misc. Effects: No
  • Width: 8 TE / HP
  • Accessories: No
Doepfer A-178 Theremin
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Doepfer A-178 Theremin

Theremin Module Produces variable control voltage when hand is moved around the antenna, Range approx. 30 cm, Maximum output voltage: 10V, Euro rack format, Power requirements: 60 MA (+12 V) / 20...

  • Width: 8 TE / HP
  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
$137 €116.38
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