声音

有的，底板上J16  （在USB type-A接口的旁边）

如何使用这个接口采集声音呢

走标准的alsalib接口，下面是record/play的命令 （板载audio声卡wm8960）

root@gx-qsb-rzg2l:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: ssidaiwm8960hif [ssi-dai-wm8960-hifi], device 0: ssi-dai-wm8960-hifi wm8960-hifi-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
root@gx-qsb-rzg2l:~# arecord -D hw:0,0 -f S16_LE -r 48000 -c 2 -traw /tmp/a.wav
Recording raw data '/tmp/a.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
^CAborted by signal Interrupt...
root@gx-qsb-rzg2l:~# aplay -D hw:0,0 -f S16_LE -r 48000 -c 2 -traw /tmp/a.wav
Playing raw data '/tmp/a.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
root@gx-qsb-rzg2l:~#

走标准的alsalib接口，下面是record/play的命令 （板载audio声卡wm8960）

root@gx-qsb-rzg2l:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: ssidaiwm8960hif [ssi-dai-wm8960-hifi], device 0: ssi-dai-wm8960-hifi wm8960-hifi-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
root@gx-qsb-rzg2l:~# arecord -D hw:0,0 -f S16_LE -r 48000 -c 2 -traw /tmp/a.wav
Recording raw data '/tmp/a.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
^CAborted by signal Interrupt...
root@gx-qsb-rzg2l:~# aplay -D hw:0,0 -f S16_LE -r 48000 -c 2 -traw /tmp/a.wav
Playing raw data '/tmp/a.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
root@gx-qsb-rzg2l:~#

我用耳机收集到的全是噪音，有什么可以改进的地方吗。是不是用一个麦克风会好一些。