On 24. and 25. September 1973, Kiss entered the Bell Sound Studios to do a rough demo of their entire song catalog at that point. The Bell Sound demos were essentially quick and dirty recordings of Kiss’ entire song catalog at that point. The recordings were to be used by Kerner and Wise for consideration and selection of what would be recorded for the debut album. The recordings seem to have simply been the band running through their songs live in the studio. Four tracks, “Let Me Know,” “100,000 Years,” “Let Me Go, Rock ‘N Roll,” and “Firehouse” were released on Kiss’ 2001 “Box Set” with recordings of “Nothin’ To Lose” and “Acrobat” remaining unused.