audio problem in mic echo
i am working in Linux 9, and write a voip application
soundcard chip: C-Media CMI8738 my problem is when i recording voice from mic, the signal will be hear from my earphone. but i do not want hear the echo from the earphone, because my earphone need to play the RTP packet data. in C-Media CMI8738 device driver the mixer seem only support volume,line,mic,pcm,synth,speaker,cd what i need to do from the "ioctl" function(i need to write the problem,and can not use the toolkit to change the mixer setting), that i will not hear the echo vocie from my mic. Likely in WinXP turn the mic to mute. thank for your help. |
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