Dear ALSA users
Alsa is working fine in real time in full duplex mode,
I mean I can say and hear my speech at the same time
using latency.c provided by alsa with my Delta 44
card. But when I try to do speech processing, I get
wierd background noise with the actual signal.
I am doing
format=SND_PCM_FORMAT_U8
unsigned char *buffer;
buffer[i]=2*buffer[i];
I also tried:-
format=SND_PCM_FORMAT_S16_LE
short *buffer;
buffer[i]=2*buffer[i];
But got the same wierd back ground noise.
so can't I directly multiply it, or is there any
special way of processing speech data from the sound
card. I had similar problem with free OSS API.
Any suggestions, I really appreciate your help.
Thanks
regards
Vineet
=====
Yours Truly
Vineet Agrawal
Staff Research Associate III
University of San Francisco (UCSF)
Ph: 415 5024456 (office)
864 6504260 (mobile)
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