Why isn't audio rendering? Using the VSE, I have included a strip of audio, the "scene" that I animated, and other video footage. I have been able to hear the audio in playback, however after rendering I cannot hear any audio. 

I have used multiple combinations for codecs, the one in the image below among others. An audio codec HAS been selected for all of them, but none of my rendered results have rendered audio.
m.ardito suggestion have worked for me. Ive had the same issue where there was no audio in rendered file. Than I realised that I can not hear audio also while scrubbing in Video Sequence Editor. Simple ALT+A have returned everything to normal.