Good morning! Are you saying I should modify the source code of

alsa-driver-1.0.25?

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Hello! There have 2 stereo ADCs support one stereo microphone and one

legacy mixer recording simultaneously, said in the document of ALC888 Datasheet .I inputed 1KHz sine wave into every pins (Line1-R,Line1-L,MIC1-R,MIC1_L,MIC2-R,MIC2-L,LINE2-R,LINE2-L) of ALC888 by signal genrator,and used command 'arecord -c 4 -f S16_LE -r 44100

test.wav' recording in fedora14.but ALL audio data are recorded in channel

1,2.No any data in channel 3,4.Why?How can I record every pins audio data in each channel?

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In alc_auto_create_input_ctls , add the connection from node 0x0b of

mixer ADC as input source similar to those pin complex

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Those Mic/line/CD playback volume and switches of node 0x0b affect the

signal of the new input source ”mixer”

Yes, also need a switch which mute the input from 0x0b for all output jacks to prevent feedback if using mic

the current hda driver only support stereo capture and you have to implement multi channel capturing similar to multi channel playback in hda_codec.c

snd_hda_multi_in_analog_prepare

for (i = 1; i < num_adcs; i++) { snd_hda_codec_setup_stream(codec, adc_nids[i], stream_tag, i * 2, format);

or

try multi plugin of two stereo capture devices