JamesH <hauge.james@xxxxxxxxx> wrote: > Aloha from Hawaii! > > I'm using a Raspberry Pi and am trying to make an alarm kinda thing... Alarms play noises, not record, right? > What I need to figure out how to do, and what I'm looking for help with is > to figure out how to make sox (using the rec command I believe) record into > a null file (meaning it doesn't really record, just goes through the > motions) until there's 5 seconds of silence... > > Being that the Raspberry Pi doesn't have any kind of audio capture setup, I > was able to run a command that brought up a loopback audio device (that > command is "sudo modprobe snd-aloop") I'm not sure I follow. You want to record 5 seconds of generated silence into nothing? > Now, how can I give sox a command to record from the loopback until there's > 5 seconds of audio, or should I be looking at a different way of checking if > the audio output of the raspberry pi has no sound? I'm not familiar with recording with sox and have never compiled snd-aloop into my kernels, but probably: AUDIODEV=... rec -n trim 0 5 You'll need to figure out the value of AUDIODEV for the aloop, though. If your kernel has support compiled, looking at the contents of /proc/asound might help; as would using alsamixer. (There's more/better supported ways, but I forget them). Based on what I'm reading, running: sleep 5 would accomplish the same thing, right? ------------------------------------------------------------------------------ _______________________________________________ Sox-users mailing list Sox-users@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/sox-users
