ffmpeg -f dshow -i audio="Microsoft Webcam C600" -acodec copy -f wav tcp://127.0.0.1:4747/
ffmpeg version N-43678-gceb8773 Copyright (c) 2000-2012 the FFmpeg developers
  built on Aug 17 2012 21:10:01 with gcc 4.6.2 (GCC)
  configuration: --pkg-config=pkg-config --prefix=/home/powernet/software/packages/win
32 --enable-memalign-hack --arch=x86 --target-os=mingw32 --cross-prefix=i686-w64
-mingw32- --enable-gpl --enable-libx264
  libavutil      51. 70.100 / 51. 70.100
  libavcodec     54. 53.100 / 54. 53.100
  libavformat    54. 25.100 / 54. 25.100
  libavdevice    54.  2.100 / 54.  2.100
  libavfilter     3. 10.100 /  3. 10.100
  libswscale      2.  1.101 /  2.  1.101
  libswresample   0. 15.100 /  0. 15.100
  libpostproc    52.  0.100 / 52.  0.100
[dshow @ 003ac3e0] Estimating duration from bitrate, this may be inaccurate
Guessed Channel Layout for  Input Stream #0.0 : stereo
Input #0, dshow, from 'audio=Microsoft Webcam C600':
  Duration: N/A, start: 24115.702000, bitrate: 1411 kb/s
    Stream #0:0: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
tcp://127.0.0.1:4747/: Unknown error