Lyric discussion by CrateCrasher 

Cover art for Let's Go lyrics by Stuck In the Sound

first time doing this, bear with me

it's about a guy that, although at first, he had huge problems, he wanted to be with someone. and this girl actually cares about him, so he completely changes himself. she's crying tears of joy because he went through all that for her sake. maybe even asking her to marry him.

"Here I am tied and bound Every night feeling low Bad days come back whatever"

There was a time when he just lived for himself today, but this Girl makes him think about his future. ("You draft me down for a split second tomorrow")

"Silence on I attempt Bow and scrape, toe the line Never get back together

With the same old style ran down my life You drag and drop, attract me after all Anyway, I'm gone tomorrow"

so, in the end, despite his resistance, he did something about it. she brought him out of it, inentionally or not.

I know you would make me happy Girl, I found my way out I found it at last now I'm sober I know it would make it concrete Now you're crying How sweet a sound

Let's go! Hey! You're crying How sweet a sound Everybody, let's go!

its as though everythings clear to him suddenly. he found his way out of bad habits and became a better person. he made it concrete. the exclamation "Lets Go!" is inviting her to go out and celebrate, and shes crying tears of joy, hence "how sweet a sound"

My Interpretation