Abstract
From its very first version, the Raspberry Pi attracted interest as a small, inexpensive, and network-friendly home multimedia player. It comes with built-in HDMI and composite video for sending signals to television sets, and most versions have an analog 3.5-millimeter audio socket. Consequently, there's a fleet of Raspberry Pi-compatible software packages designed to play video and audio files using a stripped-down, TV-friendly interface and which can be networked for multiroom audio. . However, while the high-definition video output is sufficient for viewing most movies (unless you have one of the latest 4K screens, of course), the analog audio is not up to the standards of dedicated audiophiles. As a result, a number of companies have started offering various expansion options to improve the Pi's audio capabilities and ease of integration into existing hi-fi setups.
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