DIY synthesizer soundengine (using ESP32 Arduino) - Little demo of the Roland Alpha Juno like sound

video upload by Marcel Licence

"This video is only a short sound demo of a little sound engine I tried to implement.
I recommend using a stereo output (phones or speaker) for the best listening experience.
It is based on the Roland Alpha Juno synthesis but slightly modified.
The sound is some kind of pulse width modulated saw wave without chorus.
A LFO drives the pulse width for both channels independently creating the stereo effect."

Projects can be found on GitHub: https://github.com/marcel-licence

Additional demos:

CLICK FOR MORE »

TBD 16 teaser #superbooth26 #dadamachines #tbd16 #dsp #esp32 #groovebox #electronicmusic #synth

video upload by dadamachines

"Get ready for Superbooth 26! 🚀

Here's a sneak peek at the TBD 16 from https://dadamachines.com/ , a powerful new DSP-based groovebox and synthesizer powered by ESP32.

Come see us at Booth Z385 to see the TBD 16 in action. You won't want to miss this!"

CLICK FOR MORE »

ESP32 D-50 Synthesizer - A Roland D50 CLONE with ESP32

video upload by László Róbert Kasza

"An ESP32-powered hardware synthesizer project based on the classic Roland D-50 architecture.
https://www.facebook.com/profile.php?..."

Polyphonic D50 sampler synthesizer with ESP32 in YAMAHA DX21 Hardwer :)
video upload by László Róbert Kasza

"Unfortunately, the motherboard of my dx21 synth is broken beyond repair. So she got new electronics. I have uploaded a code I wrote using Roland D50 sound samples.
So what everyone feared has come true. The Yamaha Roland DX-D50-21 :)

Abilities:
-4 d50samples
-TVA Envelope
Course, Fine, Keyfollow
-The sampling frequency is 48000Hz.
Signal on 16 bits or more
-The device is polyphonic up to 10 tones
2 LFO controlled 2 parametric EQ
-Upper Lower Choruse
-Reverb engine
-Roland D50sysex compatibility...
-hd44780 compatible LCD Display (Not implement more)
-https://data.dynareg.se/breadandbutte...
(If we are bored, we can listen to internet radio on it.)

https://github.com/kaszarobert1/ESP_D...
More FM firmware:
https://github.com/kaszarobert1/-ESP3...
Yamaha DX21 KeyMatrix Arduino Due Firmware:
https://github.com/kaszarobert1/yamah..."

Please steal this FM synthesizer UI idea (ESP32-P4 DIY FM synth)

video upload by Floyd Steinberg

"I built a simple 4 operator FM synthesizer using Elecrow's 10.1 ESP32-P4 smart screen ( https://tidd.ly/4yIlbuX ). Nothing groundbreaking, but I want to show you an UI idea I had, and if you're convinced, please start using it in your FM synths.

00:00 hi, what's this?
01:03 ESP32-P4 panel features
02.47 How to install ESP-IDF 5.4.4 in Visual Studio Code
04:29 A problem with common FM synthesizers
06:13 Reminder: FM principles
06:43 My UI idea
08:22 Sound demo
09:10 Conclusion

Thanks, www.elecrow.com

HÄLP ZIS CHANNEL
https://www.patreon.com/floyd_steinberg
https://floydsteinberg.gumroad.com/
https://floydsteinberg.bandcamp.com/"

ESP32 DRUM MACHINE V-SAMPLER

video upload by zcarlos zc

"ESP32 DRUM MACHINE V-SAMPLER
Sound demo of my DIY drum machine based on samples.
'This is not a jam' :)

Hardware:
Guition JC4827W543 C (ESP32 S3)
Shopping link:
https://s.click.aliexpress.com/e/_EzVhSEH
PCM5102A I2s dac
Optional: Rotary encoder and pots

Synth engine:
Sampled sounds. 44100Hz, 16 Bit, Mono, converted to .c arrays
Manipulate sounds: Begin, end, reverse, filter, vol, pan.
16 sound polyphony
Filter (LowPassFilter) comes from Mozzi library (github.com/sensorium/Mozzi)

Sequencer:
16 step/pattern editor and random generators (pattern, sound parameters and notes)
16 memories (each 16 patterns of 16 tracks)

Code:
https://github.com/zircothc"

previous formats

ESP32 DRUM SYNTH LOFI MACHINE V2

video upload by zcarlos zc

"ESP32 drum synth Lofi machine ported to Guition JC4827W543.
Sound demo of my DIY drum (or noise) machine.
Simply GUI to run the same synth engine I used on DRUM 2024 V1 [posted here]
No buttons, no rotary, no OLED, only TFT with capacitive toch

Hardware: Guition JC4827W543 C (ESP32 S3)
https://s.click.aliexpress.com/e/_EzVhSEH
PCM5102A I2s dac (or speaker)

Synth engine:
Wavetable synthesizer based on DZL Arduino library 'The Synth' (github.com/dzlonline/the_synth)
16 sound polyphony
Sound parameters: Table, Length, Envelope, Pitch, Modulation, + Volume, Pan and Filter.
Filter (LowPassFilter) comes from Mozzi library (github.com/sensorium/Mozzi)


Added function to select AUDIO OUT:
External I2S DAC
Internal I2S DAC (you need a speaker)
Both

Sequencer:
16 step/pattern editor and random generators (pattern, sound parameters and notes)

Code:
https://github.com/zircothc/DRUM_2024_V2"

DIY Synthesizer with ESP32 (super/hyper saw, aliasing free oscillators)

video by Marcel Licence

"This video shows some impressions of using the ESP32 for a little synthesizer project.
All processing is done on one core with sampling rate of 48kHz.
I've connected a master keyboard via MIDI to a serial input.
The synth actually can play 6 voices together (also with 6 oscillators per voice in unison/detuned mode).
The oscillators are aliasing free (wave forms had been generated in advance to avoid fold back of frequencies above nyquist).
Rough ADSR for velocity and filter is implemented.
---
I am preparing a little arduino project for sharing. It will be available soon..."

You can find additional posts featuring the ESP32 here.

Playing Light Like an Instrument — Open-Source LED Synthesizer

video upload by engmung

Note 1:43 in the video. Patternflow can be used as a controller via OSC.

"Patternflow is an open-source LED synthesizer — a 128×64 HUB75E matrix driven by an ESP32-S3, with four knobs wired straight into the pattern math. Turn a knob, and the pattern bends with your hand.

▶ Get one — Patternflow on Crowd Supply: https://www.crowdsupply.com/engmung/p...

Everything is open source: STL files, Blender sources, PCB gerbers, and firmware. The full build runs around $100 depending on where you order parts.

— What's in the video —
0:00 This is Patternflow
0:08 How it works
0:26 Build your own (~$100)
1:04 Make patterns in your browser
1:42 OSC — a pocket-size VJ rig
2:03 Why it's open source

Patternflow began with Nam June Paik's Participation TV (1963), the first work where the audience could touch the image. I wanted to go one step further — so I built an instrument where you make the image yourself.

The full story, from Paik to Patternflow:
https://patternflow.work/journal/nam-...

▶ Try it in your browser (no hardware needed): https://patternflow.work
▶ Build one — all files + build guide: https://github.com/engmung/Patternflow
▶ Join the builders — Discord: / discord
▶ Patterns, daily: / patternflow.work


Patternflow is sponsored by PCBWay.

#esp32 #ledmatrix #opensource #synthesizer #diy #maker #hub75 #mediaart"



Details:

Standalone LED visual synth with 4 rotary encoders and 128x64 RGB LED matrix (8,192 pixels).

Runs on ESP32-S3 with all generative visuals rendered live in real time.

Bidirectional wireless OSC support for Ableton (Max for Live) and TouchDesigner.

Internal hidden battery bay for cordless portable performance.

Over 150 community-created patterns and browser simulator.

CLICK FOR MORE »

ZIRCOTHC ESP32 DRUM SYNTH LOFI MACHINE

video upload by zcarlos zc

"ESP32 drum synth Lofi machine.
Sound demo of my DIY drum (or noise) machine.

Hardware:
- Lolin S2 Mini (ESP32 S2)
- PCM5102A I2s dac
- 24 push buttons (8x3)
- Rotary encoder
- OLED display I2c
- 32 LED WS2812B

Synth engine:
- Wavetable synthesizer based on DZL Arduino library "The Synth" (github.com/dzlonline/the_synth)
- 16 sound polyphony
- Sound parameters: Table, Length, Envelope, Pitch, Modulation, + Volume, Pan and Filter.
* Filter (LowPassFilter) comes from Mozzy library (github.com/sensorium/Mozzi)

Sequencer:
16 step/pattern editor and random generators (pattern, sound parameters and notes)

Soon schematics and code."

Previously:

ESP8266 DRUM MACHINE V2

video upload by zcarlos zc 5 years ago in 2019

"ESP8266 DRUM MACHINE V2
2 MPR121 modules (24 keys)
1 I2S DAC
4 potentiometer (i2c ADC ADS1115)
RGB neopixel style leds

More info: https://zircothc.wordpress.com"

ESP8266 DRUM MACHINE

video upload by zcarlos zc also 5 years ago in 2019

ESP8266 DRUM MACHINE
2X MPR121 modules
1 MAX7219 module
1 I2S DAC
24 Green/Red LEDS

More info: https://zircothc.wordpress.com

DIY DRUM AND BASS SYNTHESIZER ESP32

video upload by GlakGlikGluk

"Sebelumnya saya sudah berbagi skema dan program data tetapi hasil keluaran suara stereo masih terlalu banyak kebisingan dari tampilan oled dan catu daya, sekarang saya mengubahnya ke tampilan Hi-fi dengan keluaran mono itu terdengar lebih baik. Jika kalian ingin membuatnya saya sudah menyiapkan data dan skema baru di google drive saya .
Link data dan skema :
https://drive.google.com/file/d/1-f2K...
.
Modul ini di buat dengan micro controller ESP32 dengan keluaran suara PWM mode Hi-fi tanpa penguat operasional saya rasa sudah cukup
.
Gunakan catu daya 5V / 1Amper di pin Vin jika inging menggunakan adaptor jika port micro usb cukup charger smartphone saja"

Googlish:

"Earlier I shared the schematic and data program but the stereo sound output is still too much noise from the OLED display and the power supply, now I changed it to a Hi-fi display with mono output it sounds better. If you want to make it I have prepared the data and new schematic in my google drive .
Data link and schematic :
https://drive.google.com/file/d/1-f2K... .
This module is made with an ESP32 micro controller with a Hi-fi mode PWM sound output without an operational amplifier, I think it's enough
.
Use a 5V / 1Amper power supply on the Vin pin if you want to use an adapter, if the micro USB port is enough for a smartphone charger.

TRESSE by Våld Labs — 39 Engine Polyphonic Desktop Synthesizer | Demo 3

video upload by Våld Labs

"3-voice polyphonic synth powered by ESP32-S3. 24 modified Mutable Instruments Plaits engines + 14 original engines and a FreaqFM-inspired engine. DIN, USB-C & Bluetooth MIDI. Built-in FX. 1000+ presets.

🔗 More info soon

🔊 ALL 39 ENGINES (current count)

— MODIFIED PLAITS ENGINES (0–23) —

00 EastCoast · Detuned virtual analog, variable waveforms
01 PhaseDist · Triangle through waveshaper/wavefolder
02 DX7 I · 2-op FM bank 1, variable feedback
03 DX7 II · FM bank 2, metallic/percussive
04 DX7 III · FM bank 3, brassy/complex
05 Terrain · Dual formants, VOSIM/Pulsar/CZ-style
06 StrChor · String machine/organ chord generator
07 Chiptune · 8-bit chord engine

CLICK FOR MORE »

ESP32-S3 Synthesizer development continued! Routing matrix fitted.

video upload by Bad Dog Designs

"Carrying on from the initial clip, the Synth has now got its routing matrix on the CAN bus, so I can assign various modulation sources ( LFO1 / LFO2 / ADSR / Velocity / Mod wheel ) to any global destination ( Resonance / Frequency / Level / LFO2 / Unison Detune ) or any of the parameters for any of the oscillators - up to a maximum of 12 separate routes.

It's also Stereo now, so each oscillator has Pan control as a new addition.
All the audio in the clip straight out the back of the DAC on the ESP32 :)

Next step, I've added an SD card to the ESP32 so there will be patch storage, and also the ability to change wavetables, as it currently just uses a single Sinewave generated at startup.

All open source, files on Github https://github.com/Bad-Dog-Designs/ES..."

ESP32-S3 Polysynth - Absolutely rocking it!

video upload by Bad Dog Designs

"An update on the ESP32-S3 Polysynth build.
I've got the sound engine working really well, and it now has patch storage and retrieval, along with 2 wavetables - .wav files loaded off an SD card.

Next up is making it look pretty to match the sounds it can make!

In the video, all the sound is out of the back of the DAC, but as the synth is not multitimbral ( the ESP32 would melt ) I've multitracked a couple of tunes to demo the sort of sounds it can make.

Headphones on, and bonus points if you can identify the tracks!!"

Gecho v2 Prototype and Korg Volca FM

Published on Apr 1, 2019 Gecho Loopsynth

"The v2 prototype is working very well so far, here the MIDI Out functionality is being tested with Korg Volca, also Line-in and Line-out connectors are actively used. All is recorded via USB sound card directly from Gecho and presented in raw form. You can find more info here: http://gechologic.com/new-batch-updat..."

"The final Gecho v2 prototype
Since the previous update about v2 that was posted in August last year, it took 3 more revisions to get here. Although the first prototype of Gecho v2 has been completed, blueprints verified by our skilled hobbyists friends who soldered their own prototypes, and it even passed CE/FCC testing with flying colours, and we could go ahead with the production - it was just not good enough - it needed a small upgrade. And, things tend to turn more complicated than they appear :)

Thanks to everyone for encouraging comments, questions and feedback during the past few months, it has been very helpful and contributed a lot to shaping the new model.

While working on Glo (the whale synth), I came to realize that sticking to STM32 platform looks nice in short-term; in theory, only small modifications are needed to port the firmware over. But there was a risk that when implementing the new features you are waiting for, like MIDI and sync modes, it would be needed to trade off something on the sound side (e.g. level of polyphony) to get the extra power for the additional processing required.

CLICK FOR MORE »

Arduino VGM player with rough SN76489 emulation - sneak peak of a video game music chiptune project

video upload by Marcel Licence

"Similar to the previous project I wanted to implement the playback of a new file format.
In this project VGM files are played on different platforms (decompressed VGZ files).
To get any audio I've implemented a very rough emulation of the SN76489 sound chip.
It has three square wave outputs and a noise channel.
The noise channel does not completely work as intended yet.
You might hear some deviations to the expected audio of the video game music.
This project is implemented in Arduino.
After adding some more features I will make this project available soon.


Used VGM files:
- Sonic the Hedgehog 2 - 07 - Sky High Zone.vgm
- Global Gladiators - 02 - Techno Tune.vgz
- Global Gladiators - 03 - Duelin-Dance.vgz
- Global Gladiators - 04 - Dance Tune.vgz
- Lemmings - 01 - Title screen.vgm
- Lemmings - 02 - Can-Can.vgm
- Lemmings - 03 - Levels 2 & 19.vgm
- Lemmings - 04 - Levels 3 & 20.vgm
- Lemmings - 05 - Levels 4 & 21.vgm

Files were originally in .vgz format and I renamed them to .vgz, decompressed them
and finally renamed the uncompressed files back to .vgm before I could play them.

---

Projects can be found on GitHub: https://github.com/marcel-licence
Instagram: https://www.instagram.com/marcel_lice...
Twitter: https://twitter.com/MarcelLicence
Discord: https://discord.gg/yT8bQdZE (if the link doesn't work please check the description of the latest video)
Mail: mailto:marcel.licence.o@gmail.com

---
Intro, Raspberry Pi Pico via PWM: (0:00)
ESP32 playback via audio codec: (2:37)
ESP8266 test output via PWM: (3:27)
ESP32-S2 using I2S DOUT alone: (4:17)"

ESP32 polyphonic synthesizer add-on - simple arpeggiator and virtual split (for Arduino)

video upload by Marcel Licence

"In this video you will find a short demonstration of the arpeggiator module and a virtual split point.
Both modules are still work in progress but also usable.
I would like to integrate them into existing projects to make them more accessible.

All you hear comes directly from a single ESP32 (with PCM5102A DAC).
The project is a modified basic synthesizer with the alpha juno oriented sound generation.

Key features:
- virtual split point listens to all midi channels
- an upper and lower area can be defined
- notes are forwarded to different MIDI channels
- 16 bit arpeggiator
- sequences can be predefined and part of the code
- sequences can be overwritten by playing the notes
- variable tempo - variable gate time

This may be also interesting for you: Mono stepper synth with arpeggio
The first try with the alpha juno like sound

Both and moreposted here]

Projects can be found on GitHub: https://github.com/marcel-licence"

WVR : modern, open source, embedded audio for $25

Currently on Kickstarter here.

Quick details via WVR:

"WVR is an ESP32 with a nice DAC and 8GB of fast eMMC memory. 18 stereo voices of simultaneous playback (at CD quality), which I think is something really needed in this space, in an open source project, at this price point.

The project also includes
a USB MIDI HOST add-on board,
a neat JavaScript library called RC.JS designed to help Arduino folks build GUI's, using React Native and Expo
the ability to store multiple firmware binaries in the eMMC, with the ability to boot from any of them
some tools to make building multi-sampled instruments a snap
2 dev boards
a stompbox version
etc, etc."

via the Kickstarter campaign:

"WVR is an open-source embedded solution for audio, with surprising capabilities. It includes everything you need to get started with embedded audio, with no soldering, and no coding necessary. WVR arrives ready to operate.

WVR is also a highly versatile device, capable of powering a new generation of embedded audio design, thanks in part to its wifi and bluetooth radio, providing all the power of a versatile and extensible Graphical User Interface ( GUI ), without the need for a screen or other interface. Users can upload samples, manage firmware, set configurations, build sequences, or control any other data imaginable, both wirelessly, and intuitively, using their laptop, or mobile device, inside a web browser, or even on a native mobile app on Android or iOS.

Capabilities:

Playback up to 18 stereo wav files simultaneously, with ~1ms latency

Accepts virtually every audio file format, at any resolution, and any size, including wav, mp3, ogg, acc, flac, pcm, aiff, and many more

Upload audio, map samples to MIDI notes, configure pin functionality, apply FX, manage files, etc, all over WIFI, with the default firmware that WVR ships with, and without writing any code

Holds over 12 hours (8 GB) of stereo audio, at 16bit 44.1kHz resolution

Can buffer over 1.5 minutes (16 MB) of stereo audio in RAM alone, at 16bit 44.1kHz resolution
Optically isolated MIDI input, provides to-spec MIDI input implementation without any additional circuitry

14 GPIO pins, 8 of which can be analog inputs, and 4 of which can be capacitive touch inputs, plus the many peripherals available on the ESP32 .

WVR's Wifi can function either as a Station or Access Point (it can login to an existing wifi network, or can create its own network and accept connections directly from devices in range, without a router or local network of any kind)

write firmware in Arduino, and upload over wifi. Stores multiple firmwares onboard, selectable via the UI. Fully compatible with the extensive, and battle-tested ESP Arduino library, and the exceptionally powerful ESP-IDF framework.

use RC.js JavaScript framework to modify, or custom build, the User Interface that WVR serves to users, without prior knowledge of CSS, HTML, Babel, Node, etc. Even build and deploy native mobile apps for iOS or Android from the same code base. You can play with RC.js in this REPL, try modifying the existing code, to see how it's intuitive, and highly portable, component-based syntax works, and check out the README.md file to learn more.

onboard Ultra Low Power (ULP) co-processor means WVR consumes only ~10uA in sleep mode

QUN synthesizer: PWM for SAW wave and Triangle

Published on May 28, 2020 Nunomo LLC

Follow-up to this post.

"The synth has a kind of unique PWM for SAW and TRIANGLE.
The product will be available soon."


Additional details via Nunomo:

"Based on ESP32 Lyrat development board, QUN synthesizer is one of the most powerful / versatile full-featured pocket sized synthesizer, with amazing pricing.

Connectivity: Standard MIDI(TRS A type), BLE MIDI, UART MIDI(Supports MAC OS X and Windows through my SerialMIDI.

ESP32 Lyrat

Originally designed for smart speaker.

Analog Modeling engine

The analog modeling engine is made from scratch.

CLICK FOR MORE »

Arduino sample synthesizer is now full of samples - loading SF2 and WAV samples on ESP32 & RP2040

video upload by Marcel Licence

"I've been working on improving the sampler project, especially how it loads sound samples.
Now, you can load samples from SF2 soundfonts, wav files, and a chosen directory.
This project works on ESP32 and RP2040, and more support is in the works.
I've also included the effects section from the last project.

Soundfonts do contain one big chunk of 16bit/24bit sample data, a list of data sets.
They have details about the range, tuning, and loop points of the samples.
There's also a list of instruments that can use different samples for various key and speed levels.
Lastly, there's a list of presets with additional settings.
I tried to make it easy to load specific parts of the soundfont, leaving out some options on purpose for flexibility.

You can also load wav files. These files might have extra information about the samples, like loop regions and tuning.
They are stored in an additional tag: "smpl".

In the future, I'm thinking of supporting different data formats (like 8-bit and stereo) and adding more file formats for loading samples.
I'm considering vgm and spc (Sega Mega Drive and Super Nintendo samples) and aif files containing sample info.

Sample sources:
SM64SF V2.sf2 - https://www.smwcentral.net/?p=viewthr...
Emu EMAX II Soundfonts - https://archive.org/details/emax-2-sf-2
Linn LM-1 - https://www.dropbox.com/s/6lbofq90s54...
Enigma Flute Sound – Emulator II Shakuhachi sample - https://music.geisheker.com/download-...
SC55 Piano_V2.sf2 - https://musical-artifacts.com/artifac...
Yoshi's Island (WK 1.05).sf2 - https://musical-artifacts.com/artifac..."

Arduino tracker on ESP32 developed from scratch - little sneak peak of a tracker/synthesizer project

video upload by Marcel Licence

"I have started to develop a tracker from scratch.
It runs on the ESP32 and also contains features from my previous projects.
The file format is quite simple.
All samples are integrated in the .mod file.
There are also patterns that are put together as a song.
I copied post effects from my old projects and added a feature to play the embedded sounds/samples.
Feel free to leave comments with ideas and suggestions to move the project forward.

Used tracker files:
- Patrick Phelan - Lotus3_Cd6-Shamrip.mod
- Patrick Phelan - Lotus3_Cd3-Lotus3.mod
- BOULA.MOD
- MONSTER.MOD
- PRES.MOD
- MINES.MOD
- bodyblow.mod
- 2unlimitedmagic.mod
- 2unlimitedmix.mom

---

Projects can be found on GitHub: https://github.com/marcel-licenc"