TD4 4-bit Sound

Over on my other blog, I spentt a fair bit of time looking at the TD4 4-bit CPU. One of the things I wanted to do with my NAND Oscillators and Logic Sequencer PCB was hook up the address/select pins to something else. And with three select pins, allowing the choice between 8 notes, what better … Continue reading TD4 4-bit Sound →

NAND Oscillators and Logic Sequencers

I've had a bit of a play with logic based synthesizes in the past, but not in anger. However I've recently picked up "Make: Electronic Music From Scratch" by Kirk Pearson from Dogbotic. It is excellent and a good chunk of that is based on circuits using the CD4093 Quad NAND chip, so I've started … Continue reading NAND Oscillators and Logic Sequencers →

Multi-Mode MIDI Step Sequencer – CDR Format – Part 3

This post revisits the "CDR format" (CD Rack Format) panel version of my Multi-Mode MIDI Step Sequencer. Part 1 detailed the build and testing of the panel. Part 2 updated and enhanced the Multi-Mode MIDI Step Sequencer code to run on the panel. Part 3 (this post) details the design of a panel using a … Continue reading Multi-Mode MIDI Step Sequencer – CDR Format – Part 3 →

Arduino Drum Trigger to MIDI

After playing with my Arduino Euclidean Gate Sequencer I started to think about how to turn that into MIDI. One option, naturally, is to add MIDI to the sequencer itself, but I thought the more versatile approach would be to build a second Arduino that took trigger pulses and turned them into MIDI drum messages. This … Continue reading Arduino Drum Trigger to MIDI →

“Baby8” CV Step Sequencer – Part 1

A common early project for anyone starting to play around with analog synthesis is a "Baby8" step sequencer. There are many designs out there on the Internet and many ready-designed kits that can be bought and made. I can recommend the Rakit Baby8, which has some neat features. I've used it with my Educational Synth … Continue reading “Baby8” CV Step Sequencer – Part 1 →

Arduino MIDI Multi MUX Step Sequencer

This applies the same extension from the Arduino MIDI Multi MUX Controller to the Arduino MIDI Mux Step Sequencer showing how it could be expanded to support 32 potentiometers or more in a MIDI step sequencer. Warning! I strongly recommend using old or second hand equipment for your experiments. I am not responsible for any damage … Continue reading Arduino MIDI Multi MUX Step Sequencer →

Arduino Slider Phased Rhythms

There is an interesting video going around social media of someone playing a simple drum beat at 120bpm, 119bpm and 121bpm and you can hear the rhythms going in and out of phase, so I thought it perhaps time to update my Arduino Mux Slider Phased Relays to actually play a rhythm. https://youtu.be/hpoJ7eNfn_8 Warning! I … Continue reading Arduino Slider Phased Rhythms →

Arduino USB MIDI Mux Step Sequencer

This post revisits an older project - the Arduino MIDI Mux Step Sequencer. Or more specifically, part 2 of that project that used an off-the-shelf 16-potentiometer shield for an Arduino Uno. Except this time, I've paired it with the "upgrade" to my Arduino Uno to make it USB MIDI compliant. https://youtu.be/amagp7ANns4 Warning! I strongly recommend using … Continue reading Arduino USB MIDI Mux Step Sequencer →

Pi Day MIDI Sequencer

If you write your dates month first, then 14th March is recognised as Pi day i.e. 3.14.(2022) in this case. I've long had the idea of doing something MIDI or sequencer related to number sequences. I'd like to do something with the Online Encyclopedia of Integer Sequences (OEIS) at some point, but as it is … Continue reading Pi Day MIDI Sequencer →

Arduino MIDI LED Step Sequencer with MCP3008

Having now experimented with an SPI eight-way analog to digital converter in the shape of the MCP3008, I wanted to build a step sequencer where the type of analog input was configurable. This project allows you to choose between the following options for controller the steps of the sequencer: The native analog inputs on the … Continue reading Arduino MIDI LED Step Sequencer with MCP3008 →