Awful Audio in Video post-render (Premiere Pro CC) I'm trying out Adobe Premiere Pro CC 2014 and I have a video with three audio tracks. The quality of each track is as follows (listed as the "Source Audio Format" in Premiere): 


48,000 Hz 16-bit Mono 
16,000 Hz 16-bit Mono
44100 Hz - compressed - Stereo


The sequence settings for the audio is "48,000 Hz, Stereo, and Audio Samples". When I render what I'm trying to use is h.264 and for audio my settings are "AAC, 48,000 Hz, Stereo, High, 320 Kbps, Bitrate"   

I've tried numerous other settings as well, including different encodings, and whenever I render out the video the audio sounds thin and echoes a ton. It is really awful. The only way I'm able to get all three tracks to play together nicely, is if I render them as an uncompressed .wav file, but obviously I'll get no video then. Another strange thing is that all the other tracks (in camera audio, music track) sound completely fine, but the one that's really important, the narrative voice over sounds awful. 

What am I doing wrong?! 

EDIT: Here are some pictures of the settings
Do they playback properly in Premiere before you render? If they playback fine when you export them as uncompressed wav, try exporting them to wav, then import that single wav back into your project, mute the other 3 channels, and then export your single wav and single video.