Category: Digital Synthesis

Pico Touch Board Audio

I wanted to go back to my Pico Touch Board PCB Design and see if there was a way to make it more stand-alone. The original design was to make it a MIDI controller, but that isn't the only option. https://makertube.net/w/tADSyrPrUdR1mx7yKRXZTC Warning! I strongly recommend using old or second hand equipment for your experiments.  I am … Continue reading Pico Touch Board Audio →

Arduino and AY-3-8910 – Part 4

After Part 3 I started to go back and add MIDI, and changed the waveform on the touch of a button, and then started to wonder if I could add envelopes and so on. And then it occurred to me, I didn't really need to re-implement my own synthesis library, I could probably write a custom … Continue reading Arduino and AY-3-8910 – Part 4 →

Arduino and AY-3-8910 – Part 3

I suggested in Part 2 that it might be possible to do some simple modulation of the amplitude of the AY-3-8910 channels rather than drive frequencies directly. This is taking a look at the possibilities of some kind of lo-fi direct digital synthesis using that as a basis. Part 1 - Getting started and looking at … Continue reading Arduino and AY-3-8910 – Part 3 →

ESP32 WROOM Mozzi Experimenter PCB Build Guide

Here are the build notes for my ESP32 WROOM Mozzi Experimenter PCB Design. Warning! I strongly recommend using old or second hand equipment for your experiments.  I am not responsible for any damage to expensive instruments! If you are new to electronics and microcontrollers, see the Getting Started pages. Bill of Materials ESP32 WROOM Mozzi Experimenter PCB … Continue reading ESP32 WROOM Mozzi Experimenter PCB Build Guide →

ESP32 and PWM – Part 3

I'm continuing my look into the ESP32 and PWM. This time I'm adding in some analog control to introduce an element of frequency modulation to the synthesis. Part 1 - All the theory and research around PWM and the ESP32. Part 2 - Generating different waveforms on multiple channels. Part 3 - Introducing analog control and frequency … Continue reading ESP32 and PWM – Part 3 →

Arduino Direct Digital (Additive) Synthesis

This is actually a collection of previous projects with the code tidied up a little and combined to show a single sketch that can be configured for either PWM, an R2R ladder or the MCP4725 I2C DAC. There isn't really anything here that hasn't been talked about before somewhere, but hopefully this can act as … Continue reading Arduino Direct Digital (Additive) Synthesis →

Raspberry Pi Pico Synth_Dexed? – Part 2

Now that the initial elation at getting a reasonable sounding, er, sound from my Raspberry Pi Pico Synth_Dexed has worn off, I've been seeing what I can do about the performance. TL;DR: this is all analysis and measurements, working out and attempting to understand how it all currently works. I haven't fixed anything or improved it yet. I'm … Continue reading Raspberry Pi Pico Synth_Dexed? – Part 2 →

ML Synth Tools XIAO SAMD Synth

Having listed out a few Arduino Audio and MIDI Frameworks and having spent some time recently with the XIAO SAMD21, I thought I'd take a closer look at the ML Synth Tools XIAO synth. Important Update: It would appear that the ML_SynthTools and samd21_mini_synth repositories have been fairly significantly updated since I wrote this. I've tried … Continue reading ML Synth Tools XIAO SAMD Synth →