Godsmack released the audio for this song off their new album called "Generation Day".
Here's what Sully Erna told Grammy.com about it:
“‘Generation Day’ is really unique for me because not only is it this 6 1/2 minute epic, but it has these really cool textures and colors in it. The middle section has this cool, Zeppelin-y kind of breakdown, drifty and trippy. The song has this really fat, cool opening riff, and it’s something I almost think we want to open the live show with.”