Doepfer A-101-1v Vactrol Steiner Filter (Vintage Edition)

Overview

Vintage edition with black faceplate and custom knobs.

Vactrol-based multimode filter based on a schematic by Nyle Steiner. Separate inputs for lowpass, bandpass and highpass.

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Details

This filter's unique feature is that different filter types are realized by injecting the audio signal at different points of the circuit. For this reason the A-101-1 has three inputs with level control. In detail, there is one lowpass input which is normalized to the bandpass input, which itself is normalized to the highpass input. The level controls make it possible to mix the filters and to generate new filter types. e.g. with all three filter levels turned to maximum level you get a notch filter.
Furthermore the cutoff frequency influences which filter type is "monitored". This way you can blend from LP over BP to HP with increasing cutoff, known as "frequency scanning". Interesting effects happen when three different audio signals are used because they are both morphed and filtered at the same time.

connectors

CV Inputs:
3x for cutoff (1x 1V/oct and 2x with attenuator)
2x for resonance (1x 1V/oct and 1x with attenuator)

Audio:
LP input -> BP input -> HP input
Two audio outputs. 1x with rising level when Q is rising, 1x with constant level

dimensions

3U Eurorack module, 16 HP wide, 50 mm deep
Current draw 30 mA

Weight
0.22 kg
Article Number
A-101-1v
Status: The article can be picked up in the shop right now / article is ready for dispatch
availability ? immediately available
€ 19% VAT excl. €133.61 € 19% VAT incl. €159.00
Excl. 19% VAT, Excl. shippingLieferzeit 1 Tag