For the record, digging a bit and running 'pulseaudio -vv', I get (excerpt):

D: [pulseaudio] module-raop-discover.c: Found RAOP: Freebox Server
D: [pulseaudio] module-raop-discover.c: Found key: 'txtvers' with value: '1'
D: [pulseaudio] module-raop-discover.c: Found key: 'vs' with value: '110.63'
D: [pulseaudio] module-raop-discover.c: Found key: 'ch' with value: '2'
D: [pulseaudio] module-raop-discover.c: Found key: 'sr' with value: '44100'
D: [pulseaudio] module-raop-discover.c: Found key: 'ss' with value: '16'
D: [pulseaudio] module-raop-discover.c: Found key: 'pw' with value: 'false'
D: [pulseaudio] module-raop-discover.c: Found key: 'et' with value: '0,1'
D: [pulseaudio] module-raop-discover.c: Found key: 'ek' with value: '1'
D: [pulseaudio] module-raop-discover.c: Found key: 'tp' with value: 'UDP'
D: [pulseaudio] module-raop-discover.c: Found key: 'am' with value: 'AirPort4,107'
D: [pulseaudio] module-raop-discover.c: Found key: 'cn' with value: '0,1'
D: [pulseaudio] module-raop-discover.c: Found key: 'sv' with value: 'false'
D: [pulseaudio] module-raop-discover.c: Found key: 'da' with value: 'true'
D: [pulseaudio] module-raop-discover.c: Found key: 'vn' with value: '65537'
D: [pulseaudio] module-raop-discover.c: Found key: 'md' with value: '0,1,2'
D: [pulseaudio] module-raop-discover.c: Found key: 'sf' with value: '0x4'
D: [pulseaudio] module-raop-discover.c: Loading module-raop-sink with arguments 'server=[192.168.0.254]:5000 sink_name=raop.freebox-server.local sink_properties='device.description="Freebox Server"''
I: [pulseaudio] sink.c: Created sink 2 "raop.freebox-server.local" with sample spec s16le 2ch 44100Hz and channel map front-left,front-right
I: [pulseaudio] sink.c:     device.string = "[192.168.0.254]:5000"
I: [pulseaudio] sink.c:     device.intended_roles = "music"
I: [pulseaudio] sink.c:     device.description = "Freebox Server"
I: [pulseaudio] sink.c:     device.icon_name = "audio-card"
I: [pulseaudio] source.c: Created source 4 "raop.freebox-server.local.monitor" with sample spec s16le 2ch 44100Hz and channel map front-left,front-right
I: [pulseaudio] source.c:     device.description = "Monitor of Freebox Server"
I: [pulseaudio] source.c:     device.class = "monitor"
I: [pulseaudio] source.c:     device.icon_name = "audio-input-microphone"
D: [pulseaudio] rtsp_client.c: Attempting to connect to server '192.168.0.254:5000'
D: [raop-sink] module-raop-sink.c: Thread starting up
D: [pulseaudio] protocol-dbus.c: Interface org.PulseAudio.Core1.Device added for object /org/pulseaudio/core1/source4
D: [pulseaudio] protocol-dbus.c: Interface org.PulseAudio.Core1.Source added for object /org/pulseaudio/core1/source4
D: [pulseaudio] module-device-restore.c: Could not set format on sink raop.freebox-server.local
D: [pulseaudio] module-suspend-on-idle.c: Sink raop.freebox-server.local becomes idle, timeout in 5 seconds.
D: [pulseaudio] protocol-dbus.c: Interface org.PulseAudio.Core1.Device added for object /org/pulseaudio/core1/sink2
D: [pulseaudio] protocol-dbus.c: Interface org.PulseAudio.Core1.Sink added for object /org/pulseaudio/core1/sink2
I: [pulseaudio] module.c: Loaded "module-raop-sink" (index: #24; argument: "server=[192.168.0.254]:5000 sink_name=raop.freebox-server.local sink_properties='device.description="Freebox Server"'").
D: [pulseaudio] protocol-dbus.c: Interface org.PulseAudio.Core1.Module added for object /org/pulseaudio/core1/module24
D: [pulseaudio] rtsp_client.c: Established RTSP connection from local ip 192.168.0.12
D: [pulseaudio] raop_client.c: RAOP: CONNECTED
D: [pulseaudio] rtsp_client.c: Sending command: ANNOUNCE
D: [pulseaudio] raop_client.c: RTSP control channel closed
D: [pulseaudio] module-raop-sink.c: Connection closed, informing IO thread...
E: [raop-sink] module-raop-sink.c: We should not get to this state. Cannot rip socket if not connected.
I: [pulseaudio] module.c: Unloading "module-raop-sink" (index: #24).