Synth DB

The Ultimate Synthesizer Database


Total list currently 2405 items in 330 Brands

L. L. Electronics | Rozzbox One


The RozzBox V2 Poly Synth with tube filter is a 5-voice polyphonic synthesizer with digital oscillators, digital and analog filters on each voice, and one additional all tube filter.

In addition to the the classic design of a 4-oscillator polysynth with analog filters, the RozzBox features some functions that can’t be found on any other synthesizer, such as the Hacker, the chaotic filter mode, and switchable aliasing of the oscillators.


4 digital oscillators with standard and 16 additional waveforms – hard-sync possible

Configurable FM engine with 7 algorithms

Noise, external audio input, ring modulator

2 independent filters per voice

Includes 3 self-resonant Filter-Types:
- Digital high pass/low pass filter with resonance and 24dB/octave (4 filter poles)
- Analog low pass ladder filter with resonance and 24dB/octave (4 filter poles)
- Completely tube-driven analog low pass filter with resonance and 12B/octave (2 filter poles)

2 LFOs with standard waveforms and wave tracking, sync with MIDI

2 ADSR Envelopes with switchable lin/exp characteristics and trigger modes

4 completely independent sequencer lines per voice, each with its own running mode and synchronization settings

Envelope follower with separate input

Complex 4-point modulation matrix with 16 sources and 16 destinations

Complex trigger matrix with unlimited connection count, for interconnection of LFOs, sequencers, envelope triggers, MIDI clock, 

The switchable “Hacker” adds artificial analog aliasing (tunable)

Bit reduction / Sample rate reduction

‘Chaos’ mode of the digital filter

Digital hard clipping

Full MIDI control of every parameter
BrandL. L. Electronics
ModelRozzbox One
Engine TypeDigital
EngineVA, FM
Voices (max)5
LFO2 Sample & Hold, Saw Up, Square, Triangle
Engine DetailedVA: Pulse, Saw Up, Sine, Square, Triangle, White Noise. FM: 4-OP with 7 Algorithms, 2 user waveforms
Filter (VCF)2. 12dB Slope (2-pole), 24dB Slope (4-pole), High Pass, Low Pass, Resonance, Serial, Parallel. Filter 1: Digital high pass/low pass filter, Filter 2: Analog lowpass ladder filter, Filter 3: Tube-driven analog lowpass filter with resonance and 12B/octave (2 filter poles)
Envelope (VCA)2 Attack, Decay, Sustain, Release, Freerun, Polyphonic, Triggered
FX“Hacker” adds artificial analog aliasing (tunable), Bit reduction
Sequencer4 independent Seqs per Voice
Key typeN/A
Audio1 stereo, 5 mono out. 1 in
CV-gateEnvelopefollower in
Produced:2008 - 2008
Legend: Obvious Y: Yes, N: No, N/A: Not Applicable
VCO Voltage Controlled Oscillator DCO Digital Controlled Oscillator
LFO Low Frequency Oscillator Sub Sub Oscillator
VCF Voltage Controlled Filter VCA Voltage Controlled Amplifier
Velocity As with a piano, the harder you hit a key, the louder the sound, unlike most organs which always produce the same loudness no matter how hard you hit a key. Aftertouch Pressing a key after you activated it. Channel Aftertouch, no matter which key, it will send a Channel message. Poly Aftertouch, sends the pressure per key instead of the whole channel.
Values for OSC, LFO, Filter, Envelope are per voice unless stated otherwise.

Manuals, patches etc.


If you like to discuss or talk about synths in all forms (including VST and modular), you are welcome to join the Facebook group "The Hard, The Soft and The Modular".

My music

Interested in music from "Synthisfactory" or "SX Instrumentals"?

Visit our website.

Contact Us

Did you find an error in the info or do you have an item to list? Go to the Contribution page, fill out the form and I'll see what I can do.