This application streams sound form one linux input device to another devices output using UDP/IP communication. Works with Raspberry Pi.

Clone/Download this repository to your devices and build it, by typing in terminal/console (on both linux devices):

git clone https://github.com/markondej/udp_stream
cd udp_stream
make

ALSA libraries are required, so install it before building application. Ie. on Debian this can be done by:

sudo apt install libasound2-dev

Then run service on device with sound input:

./service 0.0.0.0 6734 plughw:1,0 44100 1 16

Notice:

• 0.0.0.0 is an IP address on which service will be available, this can be set to any of device's address ie. 192.168.0.64 (0.0.0.0 means binding on all available interfaces with IP address assigned)
• 6734 is an UDP port on which service is listening
• plughw:1,0 is ALSA input device which should be used, use 'arecord -l' to find out which devices are available
• 44100 is sampling rate
• 1 states only one channel will be used
• 16 is number of bits per sample

On the output device type:

./client 192.168.0.64 6734 hw:1,0

Notice:

• 192.168.0.64 is an IP address of device with running service
• 6734 is UDP port on which service is listening
• hw:1,0 is ALSA output device which should be used, use 'aplay -l' to find out which devices are available