waveOverUDP
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amurzeau
Stream audio over UDP with low latency (can be used for remote speakers)
This compile to two tools: waveSendUDP and wavePlayUDP.
- waveSendUDP record audio and send it via UDP as interleaved 16 bits raw PCM
- wavePlayUDP receive and play the PCM stream
Achieved latency using a laptop client (recording) and raspberry pi server: 21ms
Example of usage:
Client: ./waveSendUDP --chunksize 128 --chunknum 4 --device hw:0,0 --rate 48000 --channel 2 --port 2305 192.168.1.10 Server: ./wavePlayUDP --chunksize 128 --chunknum 10 --device default --rate 48000 --channel 2 --port 2305
chunksize is in samples. There is
Options:
- chunksize: minimal chunk of audio recorded (on the client) or played (on the server). This value is directly related to the latency.
- chunknum: size of the record / play buffer in chunks (can be small on the recorder, but can be larger on the player in case of network jitter).
- device: ALSA device to record / play on
- rate: sampling rate
- channel: number of channels (1 = mono, 2 = stereo)
- port: UDP port
Additionally, waveSendUDP need the server's IP.
amurzeau