Synth DB

The Ultimate Synthesizer Database


Total list currently 2405 items in 330 Brands

Soulsby | Atmegatron


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. Features Play + 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 Program + 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 Hack + 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.
Engine TypeDigital
Voices (max)1
LFO1 LFO with 16 waveforms
Engine DetailedWT, 32 waveforms
Filter (VCF)15 digital filter algorithms
Envelope (VCA)2 Envelopes shapes
FXPhaser and distortion, 16 wavecrusher and 16 portamento settings
Arpeggiator15 sequences
Key typeN/A
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.