RuneAudio is a free and open source software that turns embedded hardware into Hi-Fi music players. We want to make a cheap, low-consumption and silent mini-PC perform as an high fidelity digital source. RuneAudio features a custom-built Linux distribution (RuneOS) and a web player (RuneUI) which allows to remote control playback and setup options, from multiple devices (desktop PC, netbook, tablet, smartphone).

Features:

• Easy to install and use
• A custom built, optimized and small footprint Linux-based OS (RuneOS)
• Runs on a variety of embedded platforms
• Works with almost every model of USB DAC in commerce
• Bitperfect and gapless playback of common audio formats (FLAC, WAVE, MP3, AAC, ALAC, etc.)
• Supports native DSD playback with DSD-over-PCM
• Playback from network drives (over CIFS and NFS protocols) and USB drives (FAT32 and NTFS)
• Playback of web radio streams
• Built-in web interface (RuneUI) for playback and setup control
• Can be controlled from a lot of third party clients (desktop and mobile)
• Supports USB Audio Class 2
• Optimized to reduce SD card wearing

https://sourceforge.net/projects/runeaudio/