Studio Electronics Boomstar 303


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SKU: STU-Boomstar303 Categories: ,
Studio Electronics



Back to the raw power and purity of non-programmable* discrete analog––where STUDIO ELECTRONICS started in 1985. The snap and punch of hardware envelopes drive the BOOMSTAR’s brilliant voltage controlled circuits with unparalleled sonic integrity and versatility. BOOMSTAR is the ultimate desktop analog synthesizer for those who remember and desire still, the electronic Analog sound that changed the world and for seekers who have yet to discover that magic and delight… in their time.
This new blazing brainchild of STUDIO ELECTRONICS represents the design collective ethos of circuit and software “Saseong” Tim Caswell, tactile layout and lead feature specialist Greg St. Regis, graphic and sound consultant Marc St. Regis, art design wizard of vector truth, John Greczula, cool-headed concept leader Geoff Farr and our relentless and wise feature and functionality consultant, Drew Neumann.
Four Models/Filter types: 4075-classic Arp 2600, 5089-classic Moog 24db ladder, SEM-classic Oberheim 12db, 303-classic Roland TB.
This All-American-Made music machine’s discrete voltage controlled analog oscillators, hand matched transistors in its filters and amplifiers and STUDIO ELECTRONICS’ typically expressive programming feature realizes its name: Earth Grounding Subs to Deep Field Shimmers… BOOMSTAR!




Sturdy steel chassis, 21 metal shaft pots, 8 knob-less plastic shaft pots, 18 chrome metal toggle switches, (16 three way for expanded functionality), Through hole circuit boards, AC power adaptor


Panel, 8.7″ wide x 7″ high, Height, 1.75″ at front, 3.25″ at back

Sound Generation

Discrete voltage controlled analog oscillators, filter, amplifier and envelopes. Hand matched transistors in filter and amplifier. No Curtis chips.

Oscillator 1

Center off switch for selection of individual or combination of sine, triangle,
saw, and square waveforms, pulse width modulation by Envelope 1 and/or software LFO.
Two octave position sub square waveform. Bi-directional 1to2 or 2to1 oscillator sync. Five
position octave range switch. Modulation of frequency or pulse width by Oscillator 2 with
depth control.

Oscillator 2

Sine, saw or square waveform. Fine tune control. Six octave range switch with LO
frequency position. Keyboard tracking on/off switch. Modulation by Envelope 1 or Envelope 2
with depth control. Level control.

Noise generator

Level control.


Frequency and resonance with 1/3 or full keyboard tracking. Envelope modulation control. LFO or Oscillator 2 modulation control.

Filter types

4075-classic Arp 2600, 5089-classic Moog 24db ladder, SEM-classic Oberheim 12db, 303-classic Roland TB.


Four-stage with attack decay, sustain, and release. Invert, loop, and drone functions. In Master mode, Envelope 2 modulates both the Filter and Amplifier for simple, one envelope operation. Envelope 1 retains modulation control of other parameters. Single or multiple triggering of attack and decay stage. Envelope 1 dynamics control.


Two position overdrive. Volume control. Feedback control routes output back into filter and amplifier.


Midi syncable software generated sine, triangle, saw, reverse saw, narrow, normal, and wide square, random, and slew random waveforms. Two speed delay function for LFO depth. Depth control for Oscillator 1 frequency or Oscillator 1 pulse width. Depth control for Oscillator 2 frequency or VCA level. Rate control, position determines sync division.

Additional features

Master tune, glide time, and bend range controls, midi and power indicator leds.

Patch points

VCO, VCF, VCA, and gate inputs. External audio input. Envelope 2 and osc 1&2 pre-filter output.

MIDI Modulators

Volume, glide, modwheel to LFO, bender and dynamics. In, out and thru jacks.



Additional information

Weight 9.9999 kg