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How to Properly Write Received UDP Audio Data to ALSA …
https://stackoverflow.com/questions/28400714/how-to-properly-write-received-udp-audio-data-to-alsa-with-c-on-raspberry-pi
I have 2 Raspberry Pis and 1 of them transmits UDP frames of Audio data to the other Raspberry Pi. The UDP Packets received are 160 Bytes each. The transmitting Raspberry Pi is sending 8KHz 8-bit Mono samples. The receiving Raspberry Pi uses Qt 5.4.0 with QUDPSocket and tries to play the received data with ALSA. The code is below.
ALSA Multiroom Audio | diyAudio
https://www.diyaudio.com/community/threads/alsa-multiroom-audio.346404/
I ran across an interesting article that described a simple system for distributing audio using a combination of ALSA loopback and the trx transmit/receive utility. trx: Realtime audio over IP Trx uses the Opus codec and RTP/UDP protocol. My initial tests were unsuccessful due to the receiver module segfaulting shortly after receiving data.
A step-by-step tutorial for live audio streaming with Roc
https://gavv.github.io/articles/roc-tutorial/
Perform this step if you want to send sound played on your Raspberry Pi box to a remote Roc receiver, for example to a Roc sink-input on another computer. First ssh to the box and configure a loopback ALSA device in /etc/asound.conf: pcm.aloop { type hw card 2 } ctl.aloop { type hw card 2 } defaults.pcm.card 2 defaults.ctl.card 2
GitHub - duncanthrax/scream: Virtual network sound card ...
https://github.com/duncanthrax/scream
Receiver systems that have an input firewall need to open UDP port 4010 , or whatever custom port you use. Functional description All audio played through the Scream device will be put onto the local LAN as a multicast stream (using unicast is optional - see below). Delay is minimal, since all processing is done on kernel level.
audio - Sending Voice over UDP with Java Sound API - …
https://stackoverflow.com/questions/62645354/sending-voice-over-udp-with-java-sound-api
I used ALSA API(Linux), PulseAudio(Linux) and JackAudio(Linux) to make the program almost real-time(less than 1 sec delay). PulseAudio's blocking API was much nicer to use than both ALSA and JackAudio but I experienced same kind of delay that I had experienced with Java Sound API. JackAudio is a low-latency audio server for professional audio work.
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