RPi 5 Quad Stereo Sound with PCM5102A

Inspired by the news that HiFiBerry are releasing an 8-channel DAC board for the Raspberry Pi 5, but slightly disappointed they've sold out of their beta-test programme, coupled with the news that Rene has added 4-channel I2S support for circle, and seeing that the HiFiBerry dac8x is essentially four PCM5102A modules and a high quality … Continue reading RPi 5 Quad Stereo Sound with PCM5102A →

CD Rack Format Zynthian – Part 2

I've recently updated my "CD Rack" box to a horizontal black box, still shaped for my "CD Rack" format modules. But as it is black, and I've a black TX816, I've rebuilt my CD Rack format Zynthian with a black, PCB front panel too. Original Design Notes: CD Rack Format Zynthian. Warning! I strongly recommend using … Continue reading CD Rack Format Zynthian – Part 2 →

RPi 400 MIDI and Audio PCB Build Guide

Here are the build notes for my RPi 400 MIDI and Audio PCB. https://makertube.net/w/tMyv2KC5D9zFLqs32MEjQa Warning! I strongly recommend using old or second hand equipment for your experiments. I am not responsible for any damage to expensive instruments! In this case - inserting this pcb incorrectly (which unfortunately is possible with the RPi-400) could damage the … Continue reading RPi 400 MIDI and Audio PCB Build Guide →

Raspberry Pi 400 Cyberdeck MIDI Player

I've finally gotten myself a Raspberry Pi 400 computer. I've wanted one for a while to use as a MIDI player for my Lo-Fi Orchestra. The idea is that eventually I might be able to run it without a large display, but instead use something like the Adafruit Cyberdeck and a PiTFT display (or similar) … Continue reading Raspberry Pi 400 Cyberdeck MIDI Player →

A DX7 USB Dongle

The amazing Rene Stange added USB Gadget (i.e. device) support to the Circle bare metal Raspberry Pi environment a while ago so I've now incorporated that into MiniDexed. This allows MiniDexed to be used as a USB device - i.e. it can just be plugged into a PC and used via USB MIDI directly, as … Continue reading A DX7 USB Dongle →

16 Tone Generator MiniDexed

I've been looking into how it might be possible to get 16 tone generators running on MiniDexed, essentially giving the equivalent of a whole DX7 on each of the 16 MIDI channels. This post looks at some of the options I've looked at: Simply using MIDI THRU to connect two independent MiniDexeds with 8 TG … Continue reading 16 Tone Generator MiniDexed →

Rebuilding my Ability to Build MiniDexed

I do all of my non-Arduino C related development in an Ubuntu Linux virtual machine and managed to trash it recently (don't ask). I have several posts that detail how I got up and running with some of the environments I needed, but didn't have the notes from my first experiments with MiniDexed, so this … Continue reading Rebuilding my Ability to Build MiniDexed →

XIAO Pi USB MIDI Device PCB – Part 2

Here are the build notes for my XIAO Pi USB MIDI Device PCB. Warning! I strongly recommend using old or second hand equipment for your experiments. I am not responsible for any damage to expensive instruments! These are the key tutorials for the main concepts used in this project: XIAO SAMD21, Arduino and MIDI 3V3 … Continue reading XIAO Pi USB MIDI Device PCB – Part 2 →

XIAO Pi USB MIDI Device PCB

One thing missing from a MiniDexed build is USB device support. The Raspberry Pi will act as a USB host to USB devices, but the MiniDexed can't be plugged into another USB host. Some versions of the Raspberry Pi (notably the zero and 3A+) support USB On The Go (OTG) which means they can act … Continue reading XIAO Pi USB MIDI Device PCB →

MiniDexed Raspberry Pi V1 IO Board – Part 2

This is the build guide for my MiniDexed Raspberry Pi V1 IO Board. Warning! I strongly recommend using old or second hand equipment for your experiments. I am not responsible for any damage to expensive instruments! These are the key tutorials for the main concepts used in this project: MiniDexed: “Bare Metal” Raspberry Pi MiniDexed DX7 Raspberry Pi … Continue reading MiniDexed Raspberry Pi V1 IO Board – Part 2 →