The SIDstick is a pocket-sized chiptunes player from Gadget Gangster.

Image: Gadget Gangster web

Not so useful, but nice: "Waveform display" (like a oscilloscope) on a VGA monitor.

(Photo: 5volt.eu)

Another attempt to make an USB sound card based on TI's PCM2704 chip by Miroslav Batek.

Do you remember the old times we listened the noisy sound and believed it's music out there? Let's play the one-bit symphony again!

A MP3 decoder for ARM-family microprocessors.

Simple AVR-based MIDI monophonic synthesizer.

An evolution of the homebrew MP3 player - if you are interested in building your own, here is all you need.

MIDI, or Musical Instrument Digital Interface, is a specification for a communications protocol between digital synthesizers and other digital music devices. It was developed to be as simple and general as possible, to give synthesizer manufacturers as much flexibility as possible, yet still have their instruments talk to each other without communication problems. Here is a simple circuit for MIDI output that works well with Wiring or Arduino, the PIC microcontrollers, the BS-2, and the BASIC ATOM Pro24.

This program tries to emulate the sound chip SID of the famous historical C64 Commodore computer (SID = Sound Interface Device). The SID emulator includes all registers of the original SID, only minor functions are not implemented yet.

Unlike old-school mechanical alarm clocks that you have to set manually, this Internet-connected alarm clock provides three primary features: automatic time setting on power-up, streaming MP3 music, and remote management.