Analogue Systems RS-420 Octave Controller


Multi functional octave controller module with CV buffering and an in-buit slew limiter for portamento effects. A perfect companion for sequencing applications as you can individualy change octaves of up to three VCOs and you can globally transpose them as well. But also in combination with voltage controlled LFOs the module is really great as you can easily double or halve etc. their frequencies for living modulations.



Two CV inputs are available to use the RS240 between a keyboard sequencer etc. and VCOs. Voltages at both inputs are mixed together and can be further processed. This happens globally, simultaneously for all three outputs by a slew limiter with a maximum time of 5 seconds and a transpose control producing a little more than ±1V (ie ±1 octave). The slew affects the CVs one one hand and movements of the fine tune control on the other.

The three CV outputs are assigned to according octave switches, calibrated exactly to 1V, in order that a jump of one octave is a true octave. Tge first output has a rocker switch for transposing one octave down or up. The outputs 2 and 3 have five-position rotary switches allowing for transposition of ±2 octaves.


Usage with Eurorack:
Analogue Systems' modules are designed solely for use in cases and cabinets made by Analogue Systems. Through the use of adaptors or adaptor cables, however, it is possible to connect them to Eurorack cases.
Should you chose to use an Analogue Systems module in an Eurorack case, please note that the warranties are thus void and the use occurs at your own risk! If the module is plugged in incorrectly and therefore damaged the customer has to bear any costs for repair and shipping!

Because of the different position of the mounting holes there will be a gap of 0.5HP (= 2.5 mm) when mounting an Analogue Systems module next to a Eurorack module. Take this into consideration when planning your system. Gaps can be covered with 1.5HP wide blank panels by Doepfer.


2 CV inputs, e.g. for keyboard or sequencer
3 individual CV outputs, e.g. for driving VCOs


3U Analogue Systems module, 12HP wide

0.163 kg
Article Number
availability ? shortly avaliable
€ 19% VAT excl. €192.44 € 19% VAT incl. €229.00
Excl. 19% VAT, Excl. shippingLieferzeit 1