Raspberry Pi4 - send own audio output (speaker output)

[flopyro]

Hello, is it possible to broadcast my own Audio Output ? So I have Raspi4 which is connected to a Projector. I project the a Movie on the neighbours house, and also the other neighbours are watching, and i tought that i can send the sound of the movie thru FM Radio, so the other neighbours can also hear the sound, not only the Image. Do you know how i could send the Audio from the movie ? I'm usind Kodi as a media player.

Thank you

[flopyro]

ok, i cannot get it to work on PI4. works with other versions PiFmRSD, or with FM_Transmitter, but with this one is not :( regardin the answer you gave laste year:

pacmd load-module module-pipe-sink file=/tmp/pulse.fifo pacmd list-sinks # search your default sink pacmd load-module module-combine-sink slaves=yoursink,fifo_output pacmd set-default-sink combined And then run pi_fm_adv --audio - < /tmp/pulse.fifo

Let me know if this works.

there is something missing here, could it be: pacmd load-module module-combine-sink slaves=yoursink,fifo_output sink_name=combined

?

Anyway, thank you for your work. !!!

[flopyro]

Now i get an errror when trying to start the station: pi@raspberrypi:~/radio/PiFmAdv/PiFmAdv $ pacmd load-module module-pipe-sink file=/tmp/pulse.fifo pi@raspberrypi:~/radio/PiFmAdv/PiFmAdv $ pacmd load-module module-combine-sink slaves=alsa_output.platform-soc_audio.analog-mono,fifo_output sink_name=combined sink_properties=device.description=CombinedSinkt pi@raspberrypi:~/radio/PiFmAdv/PiFmAdv $ cd src pi@raspberrypi:~/radio/PiFmAdv/PiFmAdv/src $ sudo ./pi_fm_adv --audio - < /tmp/pulse.fifo Carrier: 87.60 Mhz, VCO: 1051.2 MHz, Multiplier: 54.750000, Divider: 12 Allocating physical memory: size = 4354048, mem_ref = 8, bus_addr = fdfa7000, virt_addr = 0xb679b000 Warning: Master PLLA NOT Locked PPM correction is 0.0000, divider is 2305.2632 (2305 + 1077*2^-12). Error: could not open stdin for audio input. Terminating: cleanly deactivated the DMA engine and killed the carrier. pi@raspberrypi:~/radio/PiFmAdv/PiFmAdv/src $

[rashrf]

It has been a long day, so I may well be wrong, but it doesn't look like you are piping anything to the input, but you are calling stdin.

Maybe you could create some ALSA virtual sound devices, one playing back the movie soundtrack and the other used as a capture device...but I am not so sure if PiFmAdv works on a Pi4 though.

R.

On Thu, 28 May 2020, 14:27 flopyro, notifications@github.com wrote:

Now i get an errror when trying to start the station: pi@raspberrypi:/radio/PiFmAdv/PiFmAdv $ pacmd load-module module-pipe-sink file=/tmp/pulse.fifo pi@raspberrypi:/radio/PiFmAdv/PiFmAdv $ pacmd load-module module-combine-sink slaves=alsa_output.platform-soc_audio.analog-mono,fifo_output sink_name=combined sink_properties=device.description=CombinedSinkt pi@raspberrypi:/radio/PiFmAdv/PiFmAdv $ cd src pi@raspberrypi:/radio/PiFmAdv/PiFmAdv/src $ sudo ./pi_fm_adv --audio - < /tmp/pulse.fifo Carrier: 87.60 Mhz, VCO: 1051.2 MHz, Multiplier: 54.750000, Divider: 12 Allocating physical memory: size = 4354048, mem_ref = 8, bus_addr = fdfa7000, virt_addr = 0xb679b000 Warning: Master PLLA NOT Locked PPM correction is 0.0000, divider is 2305.2632 (2305 + 1077*2^-12). Error: could not open stdin for audio input. Terminating: cleanly deactivated the DMA engine and killed the carrier. pi@raspberrypi:~/radio/PiFmAdv/PiFmAdv/src $

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[miegl]

Easiest solution for piping Pulseaudio is using parec.