[FFmpeg-user] grap microphone voice

[水静流深]

in my computer  ,
aplay -l 
root at debian:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC660-VD Analog [ALC660-VD Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 6: Si3054 Modem [Si3054 Modem]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: sc [madsn sc], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0




why the command get nothing ?

ffmpeg -f oss -i /dev/dsp wheer.mp3