A good starting point is the Arduino Make Your UNO Kit, providing everything you need to build an Arduino Uno microcontroller from scratch and then use it to build your very own synthesizer.

This simple guide will show you how to build a digital synthesizer that generates and manipulates square waves. Your synthesizer will have one oscillator, which produces a variable pitch ...

[Gr4yhound] has been rocking out on his recently completed synth guitar. The guitar was built mostly from scratch using an Arduino, some harvested drum pads, and some ribbon potentiometers. The vid… ...

“The Arduino Make Your UNO Kit is also the very first of a series of more sustainable production: the packaging comes in FSC certified paper, and converts into the container for the synth.

Arduino’s Plug and Make Kit lets your hacking imagination run wild, sans solder Daisy-chain tiny boards into weather stations, game controllers, and way more.