Features¶

High-level features¶

streaming CD-quality audio using RTP
maintaining pre-configured fixed latency
restoring lost packets using Forward Erasure Correction codes
- communicating redundant packets using FECFRAME
- encoding and decoding using OpenFEC
resampling
- converting between the sender and receiver clock domains (on receiver)
- converting between the network and input/output sample rates (on receiver and sender)
- configurable resampler backends and profiles for different CPU and quality requirements
multiplexing
- mixing simultaneous streams from multiple senders on the receiver
- binding receiver to multiple ports with different protocols
- connecting sender to multiple receivers with different protocols
support for unicast, multicast, and broadcast
interleaving packets to increase chances of successful loss recovery
session watchdog
- detecting session shutdown and removing the session
- detecting playback problems and restarting the session

See also

RTP
- RTP AVP L16 encoding (lossless 44100Hz PCM 16-bit stereo)
RTCP
FECFRAME
- Reed-Solomon (m=8) FEC scheme (lower latency, lower rates)
- LDPC-Staircase FEC scheme (higher latency, higher rates)

transport API
- roc_sender — send audio stream to receiver
- roc_receiver — receive and mix audio streams from senders
command-line tools
- roc-send — read audio stream from audio device or file and send to receiver
- roc-recv — receive and mix audio streams from senders and write to audio device or file
- roc-copy — copy audio between local audio devices or files
PulseAudio modules
- module-roc-sink — send audio stream written to the sink to receiver
- module-roc-sink-input — receive and mix audio streams from senders and write to the connected sink
PipeWire modules
- roc-sink — send audio stream written to the sink to receiver
- roc-source — receive and mix audio streams from senders and write to the connected apps
Mobile apps
- Roc Droid – Android app that connects your phone to other Roc senders and receivers

See also

See also