Studio Electronics Boomstar Sensei Hybrid Eurorack Modular Synth

via this auction

"This is an incredible, portable synthesizer capable of mono and poly, analogue and digital sound. Incredible filters, with the Yamaha CS80-like filter my favourite.

Includes original lid for case, outer cardboard box, a number of cables and an IEC cable with UK plug.

Custom Monorocket Black "CARBON" case with built in power supply, plus the following modules:


• 4075 Arp-flavored Discrete, voltage controlled, 24/db/oct cascaded transconductance low-pass filter—six pairs of hand-matched transistors—Really a 4-pole ARP 4072 (better: more parts and trims).

• 5089 Mini-flavored voltage controlled, discrete analog, 24 db/oct transistor ladder, low-pass filter (hand-matched transistors).

• AMP 2 stage Class A discrete design, using 3 pairs of hand matched transistors; DRIVE—'70s era distortion and Drone control.

• ATTENULAG Switchable dual attenuator, 3 output lag generator for CV and audio.

• GRAINY CLAMPIT Granular and phase distortion additive oscillator

• LEVELS Versatile, low-noise six channel summing mixer/attenuator for audio and CV—pots are wired with logarithmic volume curves.

• LFO2 Potent all analog dual LFO module; two independent low frequency oscillator circuits provide a variety of modulation options.

• MIDI 3 Third generation extremely full-featured MIDI to CV converter, optimized and calibrated by Studio Electronics exclusively for Modstar Systems.

• MIX4 Space conscious, unity gain, 4 in/1 out, high quality audio and CV mixer and "multer".

• MULTIPLE Passive utility module with two independent sections of four linked jacks.

• OSCILLATION (x2 of) Class-A, discrete, DC coupled, output buffered, exponential current source, vintage-designed analog oscillator.

• OUTS Dual independent output module featuring a stereo 1/4" headphone amplifier output and dual mono 1/4", optimized by Studio Electronics exclusively for Modstar Systems.

• QUADNIC Four digital oscillators—each with a selection of 64 waveforms, 7 different processing modes including phase distortion and wave sequencing, and a dedicated volt per octave input

• ROUTER (R) Dual bi-directional (despite what the nomenclature states) audio / CV router.

• SCI FI Ring Mod, White and Pink Noise, Sample and Hold—Classic Synth Toolbox, with LFO and slewing control of S&H.

• SE88 CS-80 inspired dual resonant powerhouse with hi pass/band reject, low pass/band pass filter modes, and "Pendulum Chaos Generation”: a damping/stabilizing override feature for highly unpredictable overloads—input driven "blackout" (perfectly harmless Opamp smashing for smashing good fun).

• SEM Obi-flavored, 12 Db voltage controlled state variable filter and "Pendulum Chaos Generator”: a damping/stabilizing override feature for highly unpredictable overloads—input driven "blackout".

• SHAPERS Dual four stage envelope generator with independently adjustable attack, decay, sustain, and release stages. Short and long range settings deliver smooth, detailed, and complex expression.
Utility Modules

• STE 16 Dual LFO, featuring a HI-freq mode and complex waveform mixing possibilities, which thinks nothing of producing thousands of different modulation and audio frequency shifts and wiggles

• VCA 2 Discrete quad op-amp dual VCAs for audio and level chaining, control, and sharper tonality."