How to capture & playback voice using c/c++ without any delay & but at the same time?

[rvsachin]

Hi all,
I am writing a real time application for voice chat. Currently I am able to record & playback voice simultaneously but with 1-2 seconds delay which is quite high for real time. For this I have to use two different terminals & run 2 different programs one to record & tranfer & other to receive & playback voice. I am able to do this by following commands,

record: cat /dev/dsp > file_name
playback: cat file_name > /dev/dsp

delay is only because of above commands...

Can anyone please tell me any other effective method in c/c++ to record & playback of voice at the same time.

[GNU-Fan]

Can anyone please tell me any other effective method in c/c++ to record & playback of voice at the same time.

Can't you just raise the volume for the channel "Microphone"?

If you want to write audio with the smallest lag, I recommend ALSA.
It needs some effort though.

[rvsachin]

nop, increasing volume will not work...
my problem is actually the method i am using to record & playback. It is delaying whole process. Also I can't use same programm to record & write using /dev/dsp....

would you please elaborate more on ALSA procedure...??how can I do it using it..? & what are the commands for it?