Showing posts with label Atmega. Show all posts
Showing posts with label Atmega. Show all posts

Monday, August 22, 2022

Meebleeps Freaq FM Prototype


"A delicious synth by Meebleeps, pushing the atmega 328 beyond its limits.

I was going to offer the PCB but finally Andrew is doing its own version so I will let him to sell them.

Check it out!"

Sunday, July 10, 2022


video upload by GlakGlikGluk

"All of these synths are made with atmega 328P Chip.

thanks for watching."

"cuma ngetest aja dan semua modul di buat dengan program code di arduino nano yang sangat simple."

Friday, March 25, 2022

Elektor Labs J2B 9bit synthesizer midi / Soulsby Atmegatron clone

Note: This site contains affiliate links for which it may be compensated.
video upload by Elektor TV

Elektor J2B Synthesizer First Demo of Prototype from 2014.

"This video shows Elektor's J2B Synthesizer prototype running a soft synthesizer engine ported from the ATmegatron by Soulsby. Listen carefully to the sounds produced by this beast and admire the way you can control it. LPC1347 rulez the waves :-)"

via this auction

"This is a port of the Soulsby Atmegatron 8-bit monophonic synthesizer to the Elektor J2B LPC1343 ARM Cortex-M3 board. The original Atmegatron is based on an 8-bit, 32 KB flash memory ATmega328 and the firmware is available as an open source Arduino sketch. The J2B board has a 32-bit LPC1343 ARM Cortex-M3 processor with 32 KB flash memory.

The Atmegatron has two rotary encoders, eight potentiometers and a pushbutton. Two potentiometers are for volume and bass boost, the others control the synthesizer itself. The J2B board can have up to nine rotary encoders, or eight plus a pushbutton.

The Atmegatron uses a bunch of bi-color LEDs to interface with the user. The J2B can have an LCD.

The Atmegatron uses PWM to produce its sound, the J2B has excellent PWM capabilities.

Based on the previous observations, porting the Atmegatron to the J2B should not be a huge task, which is why I started doing it. The most daunting task was to replace the analog potentiometers by rotary encoders while keeping the same feel.
Two rotary encoders replicate the Atmegatron encoders, six others simulate the potentiometers. The bi-color LEDs are replaced by a 2x16 LCD, but I added two bi-color LEDs to indicate the red/green modes of the synthesizer.

A cool thing of the J2B is its built-in USB capabilities making it possible to update the firmware from any Windows PC simply by copying a file to the board which is seen as an external drive. No programmer needed at all.

PWM capabilities of the LPC1343 are a bit better than those of the ATmega328, which allowed me to increase the sample frequency and gain a bit, making it a 9-bit synthesizer. So, in theory, the sound quality of the J2B synth should be a little better than the Atmegatron."

Thursday, January 27, 2022

Arduino based MIDI Drum Sequencer

video upload by akestromer

"This sequencer started as a Big Button Sequencer. When I looked into building a drum sequencer without internal sounds his was the only one that made sense. So I owe a great deal of gratitude to Look mum no computer. I've since learned a great deal and added and removed a lot of code, out of the about 800 lines of code there are still a few in there that come from him.

I used an atmega328p, some 74HC595s, a 74HC14 and some other stuff.
In this program the sequence currently running is in a 2d array of booleans. But to save space they're saved in the dynamic(?) memory (and the eeprom) as bytes. 2 per sequence. The 16 sequences are 16 steps long and each have 12 tracks.
I'll try to post a simple version of the code soon. It's kind of a mess.

"Sketch uses 8174 bytes (25%) of program storage space. Maximum is 32256 bytes. Global variables use 1125 bytes (54%) of dynamic memory, leaving 923 bytes for local variables. Maximum is 2048 bytes."

Anyway, I hope this helps someone."

Saturday, December 11, 2021

LoFi Future //SimpleViz - 8 Bit B/W Audio Visualizer

video upload by LoFiFuture

"Available to pre-order:

Special Edition Model, only 50 units to be made in this format! All //SimpleViz orders will be shipped in may 2022! After that it will only be available as a DIY kit in a bare PCB format!

The //SimpleViz is a 8bit digital audio visualizer with a black and white composite output (NTSC or PAL) and a mono line audio input. It is inspired by early video games such as pong as well as basic video mixer wipes!

It is built & programmed with the popular Arduino IDE and is powered by an atmega 328 at its core.

Three audio reactive paterns can be selected and combined, each pattern also has a black fill mode, white fill mode and negative fill mode.

There are three control knobs, one for the audio input level, one for the audio input response (adjusts the lag and snappiness) and a third control for refresh rate, turning this knob up reduced the speed the screen is cleared, producing cool repeat effects.


-5V DC power in

-B/W Composite video output (NTSC & PAL)

-Mono 3.5mm line audio input

---Ships in May 2022!---"

Sunday, October 17, 2021

Soulsby Atmegatron 8 Bit Synth

Note: This site contains affiliate links for which it may be compensated.

via this auction

Wednesday, September 22, 2021


video upload by LESINDES

"Paul SOULSBY is introducing his SYNTHESIZERS ATMULTITRON + ATMEGATRON II w Expander on SUPERBOOTH 2021. ATMULTITRON features a polyphonic and multitimbral 8 bit sample player engine with analog VCA nd VCF and FX. ATMEGATRON II 2 voice 8 bit sample player engine + optional Expander unit."

Monday, September 20, 2021


video upload by LESINDES

Wednesday, August 18, 2021

Oskitone Scout Arduino-compatible Open Source DIY Mini Synth

Oskitone Scout Assembly from oskitone on Vimeo.

Putting together the Oskitone Scout, after it's been soldered

New from the makers of the POLY555 Synth.

It's called the "Scout" because it's the first Oskitone synth to use a microcontroller, specifically the ATmega328 -- just like the Arduino Uno.

From the readme:

scout (/skout/):

One sent to obtain information
Jean Louise “Scout” Finch, of Atticus Finch
The first synth from Oskitone to venture into the big ol' world of microcontrollers
The Scout is:

Beginner-friendly: All components are through-hole (instead of surface mount) for easier soldering, and full assembly takes about 45min. Standalone, battery-powered, doesn't need a computer or external speakers to work. Fun! 3D-Printable: Besides the electronics and nuts and bolts, all parts are 3D-printed. And with a total width of ~160mm (about 6.3"), the Scout can fit on smaller, "Mini" (18x18x18cm) size print beds.

Hackable: Arduino-compatible and fully open source! Hook up an FTDI Serial TTL-232 cable (sold separately) to update its code using the Arduino IDE.

Minimally featured: 1.5 octaves of keys, a volume knob, on/off switch, speaker, headphone jack. Monophonic square wave with fixed glide and octave.

In addition to it being the first microcontroller-controlled instrument from Oskitone, the Scout would also make a fine introductory DIY instrument for the budding electronics hobbyist. (Some experience soldering and a general familiarity with how electricity works are recommended though!)

Like my previous work, I designed the Scout's PCB in Kicad and everything else in OpenSCAD, specifically for 3D-printing. The Scout is available assembled or as a DIY kit, with and without the 3D-printed parts; and it's fully Open Source!"


Saturday, July 31, 2021

Soulsby Synths and gwEm drink tea

video upload by gwEm’s gwEmbassy

Skip points:
0:00 Introduction
0:38 The beginning
4:52 Analogue vs digital
7:16 Trademark
12:04 The MSX
13:06 Collecting and programming synths
14:56 Arduino prototype
16:14 Atmegatron vs chiptune community
18:23 Bass boost
19:07 Famous users
19:43 The interface
24:16 Sales
24:38 Juggling with freelance work
25:08 CAD
26:04 Behringer
32:42 Roland
35:15 Cool modern synths
36:45 Eurorack - the real innovators
38:00 Developing a flagship keyboard synth
39:15 Atmegatron 2
41:45 Atmultitron
42:18 Eurorack versions
43:11 The next era (FPGA?)
45:56 Superbooth and release date
46:35 Outro

Friday, April 30, 2021


Note: This site contains affiliate links for which it may be compensated.

via this auction

"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
FTDI Upload Cable included.

Thursday, February 04, 2021


Note: This site contains affiliate links for which it may be compensated.

via this auction

Tuesday, December 29, 2020

8knobsPortable synthesizer and midi controller. | Indiegogo

"8knobs is a portable synthesizer and midi controller. Right out of the box 8knobs creates drones and atmospheres (ambient soundscapes). 8knobs encourages learning synthesis, electronics, computer literacy and experimentation. Built on the popular Arduino platform it readily embodies the character of the user. It is an open source and hacker friendly instrument, ready to morph according to a wide range of use cases."

"8knobs can be used as a MIDI controller through usb, as a plug-n-play device; this means no installations, no additional convertors, no headaches. The 8knobs DIY kit consists of a PCB, an Arduino Atmega 32u4, header pins, potentiometers, all the necessary electronic components, mounting hardware, a laser cut wood veneer body and a case made of hand stitched jute with raw unbleached cotton.

8knobs has 1 audio out, MIDI over USB or MIDI over 3.5mm to connect to other traditional synthesisers. It can be powered via USB, DC 9-12v wall adaptor or a 9v battery.


// Electronics // Sound synthesis // Computer Coding

While building 8knobs you’ll learn everything from the basics like soldering to the fundamentals of sound synthesis, electronics and computer codes by understanding, engineering and experimenting with signal flow. Learn the art of signal flow by building your own custom synthesiser and controller for more experiments!


// Creative learning and new approaches

Getting familiar with signal flow unlocks a wide range of new opportunities to innovate and produce technical as well as creative applications in various media - both analog and digital.

Just like the flow of signals in the brain are interconnected and influence each other. For example, like neurons communicating information in both chemical and electrical forms, can result in infinite combinations of thoughts, words, and actions, similarly, playing with signal flow in hardware (electronics), software (coding) and space (acoustics) can result in infinite creative expressions.

The art of signal flow offers endless possibilities, and whether you take it up as a hobby or use it to pursue a life-changing innovation is for you to choose. Either way, it’s a great feeling to get your hands dirty in the energetic flow of signals and DIY culture!"

Also available in eurorack.

Saturday, December 26, 2020

How DIY 960 Sequential Controller work

Zygimantas Laurutis

"Module takes bipolar 12 to 15 volt power for operational amplifiers.
Positive rail is regulated down to 5V and power Atmega 328 microcontroller.
74HC595 shift register generates output signals for all steps.
Each step wire powers lamp and rotary switch.
Rotary can send signal to stop or skip busses each have dedicated input on Atmega 328P.
When switch is set to normal, step feeds 3 potentiometers.
Every line of potentiometers collects to a bus, that is amplified with TL074 operational amplifier by the factor of 1, 2 or 4 and goes to CV outputs.
Third line can be mixed with rate control, that uses onboard analog to digital converter.
Every step has dedicated input ports, that can be triggered with button or external signal.

You will find source code and technical drawings at:"

Digital Jam : TR-707, TB-3, VL-Tone and Atmegatron

gwEm’s gwEmbassy

"I thought I'd try a 100% digital jam to see how that would work out.

Gear used:
Roland SBX-1
Korg SQ1
Soulsby Synths Atmegatron
Roland TR-707
Zoom MS-50G
Casio VL-Tone
Roland TB-3
Alesis Nano Compressor
Zoom RFX-300"

Sunday, September 06, 2020

8-Bit ARP Odyssey?? An exploration of the Soulsby Odytron

Oscillator Sink

"The Soulsby Atmegatron is a synth I have woefully neglected as of late, so in an attempt to reignite my enjoyment of this little 8-bit friend, I flashed it with an alternative firmware transforming it into the Odytron.

The Odytron is a true 8-bit emulation of the iconic ARP Odyssey... which sounds like an idea that bridges madness and genius! In this video we take a relaxed sonic stroll through the synth's features and go on to build a few patches to see if it captures the soul of its analogue inspiration within its 8-bit digital heart!

Here are the songs I mentioned in the intro:"

Soulsby Atmegatron Song - Sink's Theme
Soulsby Atmegatron Song - Dungera's Theme
Soulsby Atmegatron Song - Seavari's Theme
Soulsby Atmegatron Song - Aireo's Theme

Sunday, August 09, 2020

Soulsby Synth - Atmegatron SN ATM-13-01-0035 with Overlays

Note: This site contains affiliate links for which it may be compensated.

via this auction

"Soulsby Atmegatron 8-bit Synthesizer with all six overlays.

'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.' "

Wednesday, June 10, 2020

Soulsby Atmegatron (Pete Fowler Edition) 2017 Pink

Note: This site contains affiliate links for which it may be compensated.

via this auction

"8-bit digital synth that can be programmed with several different synth engines... In addition to the synth there are overlays for each synth engine, which are easily uploaded to the synth via the included programming cable... You can switch between the engines as you choose on your own using the provided cable and your computer. (My favorites are the Atmegadrums and Odytron.)"

See the demo posted here.

Thursday, January 02, 2020

SQK-01 update - Gnarly DIY FM Synth

Published on Jan 2, 2020 R.O.T. Studios

A WIP update of my DIY FM synth: SQK-01.
VST-Plugin version:
EMU Xboard hack:

Hacking an EMU Xboard MIDI controller for DIY

Published on Nov 12, 2019 R.O.T. Studios

"The EMU Xboard MIDI controller is GREAT to build DIY synths with, since it uses an Atmega48 as the front panel controller. The pinouts are also easy peasy and offer enough flexibility. On top of that you get a semi-weighted keyboard with velocity and aftertouch! Lotsa bang for your DIY buck :)

Arduino library
My custom front panel code
Front panel and Due pinouts
Front panel and Atmega notes
Scanning a key matrix

via Evil Turtle Productions

"The SKQ-01 is a more extreme take on FM synthesis, offering 9 different waveforms as well as PWM (Pulse-Width-Modulation) and allows you to create anything from trippy FM pads to the most noisy and loud bass lines.

Besides the FM synthesis mode the synth can also be switched to a normal synthesis mode so that the two oscillators can be layered, for a nice full sound which lends itself for things such as massive pads.

There are two oscillators/operators giving 16 note polyphony. Each of these has it's own waveform, detuning and ADSR envelope.
The second oscillator/operator has PWM which can be used both in FM as normal synthesis modes.
The synth also features an analog emulation of a low-pass VCF with plenty of resonance available, which can be controlled with a separate AR envelope as well as an LFO.

For further shaping of the sound there is a distortion, stereo chorus and reverb effect build in. For extra dynamics in your playing Portamento and Pitch Bend can be used.

Patches can be saved and loaded from within the plugin."

Sunday, November 03, 2019

Amstrad CPC Speak&SID - First Demo of SID Player

Published on Nov 2, 2019 Michael Wessel

"First demo of Speak&SID with the DaDMaN's version of Simon Owen's SID Player. Thanks to DaDMaN from the CPC Wiki Forum for sharing his branch of this player with me, which he had already customized for the CPC! Indeed, it was very little effort to get it running with Speak&SID. I only needed to change the output port and a couple other bits. And worked out of the box, to my surprise! And now - enjoy RoboCup and Commando on the authentic SID 6581.

In case you should be wondering why the sound volume goes low and sounds tinny for a couple of seconds at some point in the video - Speak&SID also feeds into the CPC's internal audio speaker, so at that point I am turning off the amp and let the CPC speaker roar for a bit."

Some additional info in via Mechael Wessel:

"I am cooking up a SID soundcard for the Amstrad CPC

Maybe of some interest to SID / CPC lovers?

'CPC Speak&SID' is a SpeakJet-based speech synthesizer for the CPC, and a SID sound card! It works with the original SID chips, but SwinSID and ARMSID are also valid options. The video shows the original 6581 in action.

The sources for CPC Speak&SID will be made open source soon. The production costs for the card are in the 50 $ range (without the SID chip of course - builders have to source one themselves) Speak&SSID uses the SpeakChip chip for the speech synthesizer, an ATMega 8535 at 16 MHz as the microcontroller, and a Xilinx 9536 CPLD. The SID chip is connected directly to the CPC address and databus though; the CPLD generates the 1 MHz clock signal from the CPC's 4 MHz clock, as well as the other control signals such as R/~W etc.

Unlike the Commodore, the CPC uses IO ports instead of memory mapped registers for hardware interfacing. Hence, the 29 SID chip registers starting at address &d400 to &d41c in the C64 memory are mapped to the CPC's Z80 IO ports &fac0 - &fadc. C64 SID BASIC programs can be ported easily to Speak&SID, simply by replacing the POKE's (PEEK) with OUT (INP) commands, and by adjusting the SID base address.

For the SID Player shown in the video, I am using a version that was already customized by DaDMaN from the CPC Wiki Forum, and it is based on Simon Owen's SID Player for the Z80."

Patch n Tweak
Switched On Make Synthesizer Evolution Vintage Synthesizers Creating Sound Fundlementals of Synthesizer Programming Kraftwerk

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