I use Mint 16, cinnamon. Using Audacity 2.0.3
I just installed Audacity recently. I can hear sound through speakers and headset when plugged in. When I click record, Audacity starts recording, but there is no sound. It is flat line and records slience. Please help
Thanks.
What are you trying to record? Where is the performer?
Koz
Have you installed Pulse Audio Volume Control (pavucontrol)? If you are recording from a motherboard input it is best to use pavucontrol to choose the correct input.
Also see http://manual.audacityteam.org/o/man/faq_recording_troubleshooting.html#flatline .
Gale
I am recording streaming download audio, from a podcast online. Oh - I just figured it out. I do have pavucontrol installed. I went the Recording tab and changed the setting under ALSA Capture From, to: ‘Monitor of built in audio analog stereo’ As soon as I changed this setting, Audacity immediately started recording the soud.
Thank you so much! 
Yes. This is actually documented in the Manual: Recording Computer Playback on Linux .
Gale