[alsa-devel] How to use "hw" or "plughw"?

Vidblain Amaro vidblain at gmail.com
Tue Oct 11 18:48:48 CEST 2011

Hi everbody

I have a beginner in this area, i have to develop an audio application to
implement filter algorithms to reduce the noisy of an audio
I have readed the alsa api, and i decided to partition into 3 threads mi
application, one for read samples from an audio file, the second for
filter de samples, and the third for  playback the audio filtered using
but i am confused about the use "hw" and "plughw" when open de audio device.

Some suggestion

"Lo verdadero es demasiado sencillo, pero siempre se llega a ello por lo más

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