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linux - Running 'cat /dev/urandom > /dev/audio' does ...
https://superuser.com/questions/1279065/running-cat-dev-urandom-dev-audio-does-nothing
I am trying to have some fun by playing some random audio using /dev/audio under Ubuntu 17.10. The command cat /dev/urandom > /dev/audio executes successfully but it outputs absolutely nothing t...
Cat Command in Linux {15 Commands with Examples ...
https://phoenixnap.com/kb/linux-cat-command
Cat command in Linux with examples - GeeksforGeeks
https://www.geeksforgeeks.org/cat-command-in-linux-with-examples/
[SOLVED] Cant hear sound from "cat /dev/urandom > …
https://www.linuxquestions.org/questions/linux-general-1/cant-hear-sound-from-cat-dev-urandom-dev-audio-883996/
The cat <file> >/dev/audio command plays *.au sound files I believe, but that type of sound file probably isn't even on your system. Actually, AFAIK, cat <file> > /dev/audio (or /dev/dsp, if applicable) will play any uncompressed PCM audio file (*.au, *.wav) at 8000 Hz. I'm not sure if it has to be signed or unsigned, though.
audio - Unix & Linux Stack Exchange
https://unix.stackexchange.com/questions/13732/generating-random-noise-for-fun-in-dev-snd
Step by step: Open the PCM device. E.g.: fd = open ("/dev/snd/pcmC0D0p", O_RDWR). After open, PCM is in OPEN state. Set parameters with ioctl (fd, SNDRV_PCM_IOCTL_HW_PARAMS, (struct snd_pcm_hw_params*) p). The hardware parameters... Call ioctl (fd, SNDRV_PCM_IOCTL_PREPARE) to prepare device and ALSA ...
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