Music Assistant
Music Assistant plays from streaming services as well as your own music files. See the list of music sources (opens in a new tab) in the Music Assistant documentation. Music Assistant can also group speakers so they play in sync, including AirPlay and some Sonos speakers. See Groups (opens in a new tab).
Connect AUX-2 plays audio from Music Assistant through Sendspin, which is on by default.
Set it up
Connect the 3.5 mm audio output to your audio equipment. See Connect the audio output (opens in a new tab).
Music Assistant discovers Connect AUX-2 automatically as a Sendspin player. Play something on it from Music Assistant.
Warning: connect audio equipment to the 3.5 mm audio output only, never to RS-232 Port 1 or Port 2. See the port warning in Ports and controls (opens in a new tab).
To name the player and group it with other speakers, see Streaming audio with Sendspin (opens in a new tab).