reading and writing to /dev/dsp

girish_hilage · 07-22-2009, 06:29 AM

Hi,
I am running a .mp3 file using 'xine' without any issues on my Fedora Core 8 machine.

I am reading /dev/dsp and storing it in some file.
i.e. cat /dev/dsp > musicfile

Now I am stopping 'xine' and then writing 'musicfile' to /dev/dsp.
i.e. cat musicfile > /dev/dsp

In this case I can hear the music but with a lot of noise in it.
Is there any way I can remove/reduce this noise from 'musicfile'?

Regards,
Girish

michaelk · 07-23-2009, 07:23 AM

Please explain what you are trying to accomplish.
Recording from /dev/dsp defaults to 8-bit unsigned data, mono and 8 kHz sampling so you are not going to get the same quality as the MP3 source. Make sure all other sound outputs except for the PCM channel are muted or at min levels.

MrUmunhum · 07-24-2009, 03:21 PM

Quote:

Originally Posted by girish_hilage

Hi,
I am running a .mp3 file using 'xine' without any issues on my Fedora Core 8 machine.

I am reading /dev/dsp and storing it in some file.
i.e. cat /dev/dsp > musicfile

Now I am stopping 'xine' and then writing 'musicfile' to /dev/dsp.
i.e. cat musicfile > /dev/dsp

In this case I can hear the music but with a lot of noise in it.
Is there any way I can remove/reduce this noise from 'musicfile'?

Regards,
Girish

Install alsa and alsa-util. Then use arecord and aplay.

Try 'yum list \*alsa\*'.