Hackster.io member Daniel bought a Yamaha speaker that uses the MusicCast multi-room audio standard, and was generally suited to his needs, barring one issue: a lack of line-out.
He decided to rectify the situation himself, and mounted an Adafruit PCM5102 I2S DAC breakout board inside the speaker’s chassis.
This was mounted using a 3D-printed part, and connected to the speaker’s digital-analogue converter using an I2S cable, with a 3.5mm jack providing the line-out.
I2S (Inter-IC Sound) is an electrical serial interface standard (often found on compact audio devices) that allows communication between integrated circuits in a stepfather format, for low-latency, high-quality audio.
The finished modification gives Daniel line-out on a speaker that otherwise wouldn’t have offered this functionality.
