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Soulsby Atmegatron 8-bit Monophonic MIDI synthesizer

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The Atmegatron is a revolutionary synthesizer that takes classic 80s Chiptune sounds and adds powerful new features.
Musicians will love it because it is quick and easy to create and manipulate amazing sounds. The Atmegatron can do everything from bright square wave leads, to dirty basses, to wild sci-fi effects.

Programmers will love it because it is built on the Arduino platform and the software is open source. This allows programmers to change or add new features and upload them to the Atmegatron.



+ 8-bit monophonic MIDI synthesizer
+ Unique Wavetable PWM Synthesis audio engine.
+ Quick and intuitive controls, no complex menu systems
+ Stylish white aluminium case with walnut side panels
+ Many features controllable by MIDI:
+ mod & pitch wheels, filters, portamento and more
+ 16 preset sounds that can be overwritten with your own patches


+ Huge selection of waveforms and filters
+ Upload your own waveforms using the included Atmegatron Librarian software
+ LFO and 2 envelopes
+ Powerful synthesis features that takes Chiptune beyond 80s computer sounds
+ Advanced arpeggiator sequencer
+ Unique ‘wave crusher’ effect
+ Analogue bass boost for warm bass sounds


+ Download the open source code from the downloads page
+ Download the free Arduino development environment
+ Tutorials and forums to help programmers
+ Upload software using FTDI cable

Synthesis Engine

The Atmegatron uses the Atmel 328P processor, which is also at the heart of most Arduino development boards. Audio is generated by modulating a PWM output of the processor and then filtering off the modulation frequency. The Atmegatron uses analogue circuitry in the form of a steep 3rd order Chebyshev filter to maintain the high end, while still filtering off the modulation frequency.

The Atmegtron’s software uses 2 loops to create it’s unique sound. One loop uses an interrupt to update the PWM output at audio frequencies. The other loop is slower and is used for everything else (MIDI input, process the wavetable, update LFOs, envelopes, arpeggiators etc). This unique synthesis method means that while the Atmegatron is clearly at home among classic Chiptune synthesizers, it also sounds highly individual.

A Livery by Pete Fowler edition was offered limited to only 30 units manufactured, each one is signed and numbered.

Technical Specifications
Type: Digital
Synthesis: Subtractive, Wave Table
Oscillators: 1
Waveforms: Pulse Variable, Wave Table
Osc Modulation: Envelope, Input, Keyboard, Knob, Sequencer
Oscillator Notes:
+ Wavetable PWM Synthesis audio engine
+ 32 waveforms
Envelopes: 2
Evelope Paramerters: Attack, Decay, Sustain, Release
Filters: 1
Filter Modulation: Envelope, Input, Knob, LFO
Filter Notes:
+ 15 digital filter algorithms
LFO: 2
LFO Notes::
+ 16 waveforms
Polyphony & Tuning
Polyphony: 1
Timbrality: 1
Tuning: Standard
Modes: Mono
Patches RAM: 16
Storage: Internal
Editing: USB
+ 15 sequences
+ Wave crusher
+ Phaser
+ Distortion
Chips and Operating System
Atmel 328P processor
Case: Desktop
Controls: Buttons, Knobs
Display Type: LED, Backlit
Audio Output Connections: 1/4" Phone Jack, 1/8" Phone Jack, Mono Out, Stereo Headphone
Audio Output Count: 3
DAC Bits: 8
Power: 12V DC
Year Released: 2014

Product Links
Company Product Sites:
[+] soulsbysynths.com
Retail Street Price: £195.83 - convert
Used Price: $200 - $250 - convert
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