I just made the switch from OS X to Ubuntu a couple days ago. On OS X, I relied on Soundflower in conjunction with Audacity to help me flawlessly record audio from my computer's speakers to a new MP3 file (or whatever type of audio file). Instead of playing audio over the computer's speakers it would play it over the Soundflower channel and Audacity would be able to record that without any of the tinny quality I used to get when just recording the audio from my speakers using my built in microphone.
Now I'm on Ubuntu, how do I replicate that functionality? I have Audacity (yay). Where do I find audio tools that will play sound like that over an inaudible internal speaker which Audacity can record?
(I'm using Ubuntu 14.10 if that makes a difference.)