LOS ANGELES, CA - FEBRUARY 15: Musicians Franz Stahl, Chris Shiflett, Dave Grohl, Pat Smear, Taylor Hawkins and Nate Mendel of Foo Fighters attend The 58th GRAMMY Awards at Staples Center on February 15, 2016 in Los Angeles, California.

As someone who discovered rock music during the Grunge age, I’ve always been fascinated with not only B-sides to some of my favorite albums, but the songs that didn’t even get released as B-sides.

Box sets like Smashing Pumpkins’ The Aeroplane Flies High and reissues of albums by Radiohead, Pearl Jam and Weezer with entire extra discs full of unreleased stuff are gold to me.

So it’s extra special as we await the ninth Foo Fighters record, Concrete and Gold, to find the latest outtake from the HBO series based on their previous release, Sonic Highways. In it, producer Barrett Jones and Dave Grohl listen to an old Reel-to-Reel of a pair of songs that weren’t quite ready for prime time.

There’s plenty of outtakes from the Sonic Highways interviews with alternate versions of songs from the first Foo’s record as well as more unheard gems on the Laundry Room’s Youtube channel and all well worth checking out.