Laka Sequential Voltage Processor + Mixer

SetonixSynth’s Laka is a powerful, multi-functional and extraordinarily flexible hub for flipping, offsetting, combining, and re-routing voltage signals throughout a Eurorack modular system of any size.

Laka was inspired by classic West Coast Control Voltage Processors as popularized by Serge and Buchla, but takes the concept even further by using modern low-noise, rail-to-rail op-amps for excellent performance, by routing and adding the processed signals every which way, and by adding another classic old school building block to the mix, the Sequential Switch.

Equally at home manipulating audio or control voltages, Laka will quickly make itself at home in the thick of each and every patch, with its uses limited mostly by imagination.

Each of Laka’s four channels offers a separate high-headroom bi-polar CV processor (also known as an attenuverter) with its own offset, perfect for “dialing in” a signal for optimal use with other modules. Each channel offers a high degree of control including a “Zero” switch and bi-color LED indicator. The “solo” output of each channel is available at all times via its own output jack, but the channels are also available in various mixtures via the three Submix outputs (A+B, B+C, C+D) and main Mix output (A+B+C+D).

The four Channel outputs are also combined in a more novel way via the Sequential section. The right side of the module is dedicated to selecting one of the four Channel outputs and routing it to the Sequential output. This section is controlled by a high-quality manual pushbutton, a Clock input capable of operating at audio rates, a Reset logic input, and a switch controlling the number of steps. This section allows a user to create complex CV waveforms from the four Channels, flip through audio, “audition” new sounds or signals, and numerous other functions.

Voltage processing just got a lot more fun: Laka is here!

- Four high-headroom bi-polar CV processors with voltage offset, “Zeroing” switch, and bi-color LED indication
- 45mm faders for each bi-polar level control
- Submix and Main outputs for adjacent channels with one Offset voltage active on each output
- Sequential section for selecting one of four Channel outputs via Sequential output
- Clock, Manual Advance, Reset, and Steps controls for Sequencer section
- LED indicators for Sequential step selection

Maximum Current Draw: 65mA @ +12V, 65mA @ -12V
Input Impedance (Channels A-D, Calibrated): 97kΩ approx.
Input Impedance (Clock): 100kΩ
Input Impedance (Reset): 100kΩ
Output Impedance (All Outputs): 1kΩ
Maximum/Minimum Output Voltage (Channels A-D, All Outputs): +/-11.5V on standard Eurorack PSU

Eurorack User’s Manual
Eurorack Build Manual
Eurorack Interactive BOM
Eurorack BOM with Links