My band's mixing desk sounds terrible when plugged into the blue line in port of my computer, so I want to record myself singing to MP3s instead. I have the MP3 backing track set in track one of Adobe Audition, but when I record myself singing through track 2 with a Yeti microphone and play it back, it is out of sync and potentially a different speed. How do I fix this please? Whats going on? This is my first time using this program.