Korg Volca Modular MIDI to CV PCB Build Guide

Here are the build notes for my Korg Volca Modular MIDI to CV PCB. 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 microcontrollers, see the Getting Started pages. Bill of Materials Korg Volca Modular MIDI to … Continue reading Korg Volca Modular MIDI to CV PCB Build Guide →

Korg Volca Modular MIDI to CV PCB Design

I've been playing with a Korg Volca Modular recently, but it doesn't have built-in MIDI. There are some conversion kits available (apparently MIDI is broken out on the PCB inside - more here), but it also has a well-specified CV/Gate interface, so this is a design for a MIDI to CV converter with a Korg … Continue reading Korg Volca Modular MIDI to CV PCB Design →

Pico MIDI “Pack” PCB Build Guide

Here are the build notes for my Pico MIDI “Pack” 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! Bill of Materials PCB link (GitHub link below) 1x H11L1 optoisolator. 1x 1N914 or 1N4148 signal diode. 1x each of 10Ω, … Continue reading Pico MIDI “Pack” PCB Build Guide →

Pico MIDI “Pack” PCB Design

This is a PCB version of my Raspberry Pi Pico MIDI “pack” Interface - something I've been meaning to do for ages! Here is the Pico MIDI “Pack” PCB Build Guide. 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 … Continue reading Pico MIDI “Pack” PCB Design →

MiniDexed Quad DAC PCB Build Guide

Here are the build notes for the MiniDexed Quad DAC PCB. 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 single board computers, see the Getting Started pages. Bill of Materials MiniDexed Quad DAC PCB (GitHub link … Continue reading MiniDexed Quad DAC PCB Build Guide →

MiniDexed Quad DAC PCB Design

This is the design for a MiniDexed IO board for the Raspberry Pi 5 that supports four GY-PCM5102 modules as described here: RPi 5 Quad Stereo Sound with PCM5102A. Build guide here: MiniDexed Quad DAC PCB Build Guide. Warning! I strongly recommend using old or second hand equipment for your experiments. I am not responsible for any … Continue reading MiniDexed Quad DAC PCB Design →

Raspberry Pi Pico Synth_Dexed? – Part 6

One last thing I definitely wanted for my PicoDexed was the option for PWM output. This post is by way of a short coda detailing how to do PWM on a Raspberry Pi Pico. Part 1: Building Synth_Dexed for the Pico. Part 2: Assessing the performance and analysis of the Pico audio library. Part 3: … Continue reading Raspberry Pi Pico Synth_Dexed? – Part 6 →

Raspberry Pi Pico Synth_Dexed? – Part 5

Ok, ignore my last comment about Part 4 being my last post on this topic. I thought I ought to pull together all the hardware notes on how to build one as I haven't really written that down anywhere. So this shows the connections required between the Pico, I2S DAC and MIDI IN. Part 1: … Continue reading Raspberry Pi Pico Synth_Dexed? – Part 5 →

Raspberry Pi Pico Synth_Dexed? – Part 4

I was going to leave things at Part 3 blog-wise, and just get on with filling in the gaps in code now, but I've come back to add a few more notes. But this is likely to be the final part now. Recall so far, I have: Part 1 where I work out how to … Continue reading Raspberry Pi Pico Synth_Dexed? – Part 4 →

Raspberry Pi Pico Synth_Dexed? – Part 3

The story so far... In Part 1 I work out how to build Synth_Dexed using the Pico SDK and get some sounds coming out. In Part 2 I take a detailed look at the performance with a diversion into the workings of the pico_audio library and floating point maths on the pico, on the way. … Continue reading Raspberry Pi Pico Synth_Dexed? – Part 3 →