I had problems to get the microphone working on my computer. I did quite a long time intensive research on the internet but with no result. after playing around with my settings I finally found the solution. unfortunately ubuntu or alsa seems to enable only 2 channels (for stereo output) of the sound card but there are 6!! and this is how to enable all channels:
install the alsa utilities [cmd: sudo apt-get install alsa-utils]
start the alsamixer [cmd: alsamixer]
increase item "Channel" from 2ch to 6ch
now you should be able to use your microphone. remark: for adjusting the volume use the "Line" slider, the "Mic" slider won't work!
