Using hw device in presence of PulseAudio

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I have an app that uses the ALSA library on Linux.

The app calls snd_pcm_open() to open the capture device. Currently,
I use "default" as the name of the device. According to "arecord -L", the
default device is the PulseAudio server.

 Is there a way to bypass PulseAudio, and communicate with the
hardware directly?

 I've tried using "sysdefault" and "hw:0,0" as the name of the device,
and in both cases, I get an error that the device is busy. Is that because
PulseAudio has monopolized the device?

-- Paul

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