Can i find sample program to record audio through microphone connected to PC........Any link which would help me......Thanks in advance

If you will use ALSA, the following might help (from Google: alsa tutorial)

http://www.equalarea.com/paul/alsa-audio.html#captureex

Which sound system do you plan to use?

I'd think Audacity would be a fine sample program.

Build it with debugging symbols and then step through the code as you have it record through the microphone.

I have gone through the above link and compiled the program successfully with -lasound....but while executing it with argument /dev/audio i m getting the error as below
ALSA lib pcm.c:2184snd_pcm_open_noupdate) Unknown PCM /dev/audio
cannot open audio device (No such file or directory)

So what changes i have to do.....i have done alsoconf.....no problem with the sound card as i have seen,i have played some .wav files...
Thanks in advance kindly please help.

The argument you pass to the program is the name of the PCM: e.g. default, hw:0.0 or similar, not an OSS audio device.

k thank you as u said i gave ./a.out plughw:0,0 / hw:0,0 but got this error ALSA lib pcm_hw.c:1429_snd_pcm_hw_open) Invalid value for card
cannot open audio device (No such file or directory)

You should use the same PCM that works also with "arecord -D pcm". Try the PCM "default" and see, if it works.

Hi ALL,
i compiled the capture program given in the above link by passing the argument hw:0,0 bt getting the segmentation fault as below when i run gdb...Please kindly help i m not able to open the device and capture the sound..

Breakpoint 1, main (argc=1, argv=0xbff3bbc4) at captest.c:13
13 if ((err = snd_pcm_open (&capture_handle, argv[1], SND_PCM_STREAM_CAPTURE, 0)) < 0) {
(gdb) s
a.out: pcm.c:2210: snd_pcm_open: Assertion `pcmp && name' failed.

Program received signal SIGABRT, Aborted.
0xb7d15c66 in raise () from /lib/libc.so.6

It does not look like you passed one argument to your program, because argc==1 as you can see from gdb output. You will have to use in gdb prior to starting the program. Your program aborts because argv[1] is NULL in your case.

I m extremely sorry for that previous post i have passed argument with executable got the seg fault bt i didnt pass while i was checking with gdb....i have attached gdb output..hope this helps u little more to figure out...
and this is what i get when i gave command aplay -l...

**** List of PLAYBACK Hardware Devices ****
card 0: ICH6 [Intel ICH6], device 0: Intel ICH [Intel ICH6]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: ICH6 [Intel ICH6], device 4: Intel ICH - IEC958 [Intel ICH6 - IEC958]
Subdevices: 1/1
Subdevice #0: subdevice #0
i have tried even giving all the combinations hw:0,0 0,4 bt results are same...


This GDB was configured as "i486-slackware-linux"...
(gdb) b main
Breakpoint 1 at 0x80487ee: file captest.c, line 13.
(gdb) r hw:0,0
Starting program: /home/puneeth/a.out hw:0,0
[Thread debugging using libthread_db enabled]
[New Thread 0xb7c876c0 (LWP 3408)]
[Switching to Thread 0xb7c876c0 (LWP 3408)]

Breakpoint 1, main (argc=2, argv=0xbfe22294) at captest.c:13
13 if ((err = snd_pcm_open (&capture_handle, argv[1], SND_PCM_STREAM_CAPTURE, 0)) < 0) {
(gdb) s
20 if ((err = snd_pcm_hw_params_malloc (&hw_params)) < 0) {
(gdb) s
26 if ((err = snd_pcm_hw_params_any (capture_handle, hw_params)) < 0) {
(gdb) s
32 if ((err = snd_pcm_hw_params_set_access (capture_handle, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
(gdb) s
38 if ((err = snd_pcm_hw_params_set_format (capture_handle, hw_params, SND_PCM_FORMAT_S16_LE)) < 0) {
(gdb) s
44 if ((err = snd_pcm_hw_params_set_rate_near (capture_handle, hw_params, 44100, 0)) < 0) {
(gdb) s

Program received signal SIGSEGV, Segmentation fault.
0xb7e6ec24 in ?? () from /usr/lib/libasound.so.2
(gdb)