Sonicsmith - ConVertor+


The ConVertor+ allows musicians to control analog synthesizers with an electric guitar, bass or microphone. The desktop unit extracts control voltages from incoming audio material. A built-in preamp makes it possible to boost low signals. Besides a pitch CV output (1 V / octave), there are connectors emitting gate, trigger and envelope voltages. The pitch tracking shines with high accuracy. Filters help with fine adjustments. On top of that, there is an internal synthesis system, allowing musicians to use the ConVertor+ as a stand-alone instrument.



The ConVertor+ comes equipped with an audio input in 6.3 mm jack format. It is followed by a preamp, which can boost the level of incoming material by up to 40 dB. . Signals can be prepared for CV extraction via an auto-tracking filter. Its edge steepness is switchable from -12 dB to -24 dB per octave. In addition, a noise gate was implemented. The ConVertor+ analyses audio material with the help of the so-called ACO chip, an in-house development of Sonicsmith. Additionally, there is an envelope follower. The following control voltages can be tapped off the unit:

  • Pitch CV signals in the range of 0 V to +8 V. (1 V per octave)
  • Gate and trigger voltages with a signal strength of 9 V. (Threshold for gate / trigger activation: -48 dBu)
  • Envelope follower signals with a fixed decay time of 43 milliseconds. A potentiometer allows users to attenuate and / or invert control voltages generated by the envelope follower.

There are dedicated mini jack outputs for pitch and envelope follower signals. Gate and trigger voltages share one stereo socket. (L = Gate / R = Trigger)

A side-chain input can be used to feed a second audio signal into the ConVertor+. The audio input is followed by a three-stage level section (Off / 0 dB / +15 dB) and another envelope follower with a shorter decay time (15 milliseconds). It can be used as an alternative to the instance described above. The bipolar attenuator remains in the signal path. – A great addition for arpeggios and so forth.

Main and side-chain inputs feature thru outputs which allow users to tap off audio material in front of the level adjustment stages and feed it to other equipment.

The ACO chip not only serves as CV extractor, but is also part of the synthesis system. More precisely, the component produces sawtooth and rectangular waveforms. A mixer makes it possible to crossfade between both waves. For pitch alterations, there are coarse and fine tune potentiometers. Both parameters can be modulated via CV inputs.

After the oscillator section, a VCA was placed in the ConVertor’s signal flow. It is controlled by one of the envelope followers. Additionally, there is a CV input. In order to produce the most complex sounds possible, input material, processed only by the high-pass filter, can be mixed with the synthesis signals. A gate socket allows musicians to quickly deactivate oscillators and VCA. If the low pass isn’t needed in the control path, it can be switched to the synthesis path. The output level is adjustable via a potentiometer.

The ConVertor+ can be powered by an external power supply or a 9 V battery.


If the synthesis capabilities of the ConVertor are not sufficient, take a closer look at the big brother Squaver P1.
The ConVertor comes with a 9 V power supply.

Compared to the old ConVertor, the ConVertor+ features a revised control section. The new synthesizer is much easier to combine with various acoustic instruments. In addition, the Plus model is significantly less sensitive to noise.


Audio output (6.3 mm)
Audio input (6.3 mm)
Side-chain input (3.5 mm)
Main and side-chain thru outputs (6.3 mm)
Pitch CV output (3.5 mm)
Envelope follower output (3.5 mm)
Two-channel gate and trigger output (3.5 mm)
Gate input (3.5 mm)
CV inputs for coarse and fine tuning plus the VCA (3.5 mm)
Connector for an external power supply
(Tip = positive / Ring = negative)

13 x 13 x 6 centimeters

The ConVertor+ is powered by a 9 V DC power supply or a battery.

0.491 kg
Article Number

This item is discontinued or sold out and no longer available, please feel free to look for comparable new stuff in the following categories.