Newbie help

[Manu Sharma <manu.sharma@ma.tech.ascom.ch>]

Hi everyone,

I am new to ALSA and to sound world, but my new project needs me to
start working on it. For the same, I installed ALSA on my DELL CPx
notebook, which runs linux 2.4.21 and ran Paul Davis's sample code in "A
Tutorial on Using the ALSA Audio API" for initial tests. 

The "Minimal Playback" and "Minimal Capture" programs work fine on their
own. Yet, when I put them together (it is recommended to use interrupt
driven approach, but this was just a trial, so I used the non-interrupt
version) to implement the following functionality :

- Capture for about 30 seconds and store in a buffer
- Read from the buffer and playback

.. all I listen is hissing sound. The code seems to work because I can
listen to the modulations of some sort ... but normal voice is converted
to incoherent (hissing) noise.

Can someone suggest what might be going wrong, or do I need to tune some
other parameters ? Any help is appreciated.

Thanks in advance
-Manu


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