 With legendary engineer Andy Johns, who worked on such Led Zeppelin classics as "Stairway to Heaven" and "When the Levee Breaks", as well as albums by the Rolling Stones and Van Halen, Godsmack transitions from their metal roots to full-fledged classic blues-rockers.Recorded at Spiral Recording Studio in Los Angeles, Godsmack had the luxury, for the first time, of writing and recording "IV" without being on the road or having to rush to meet a deadline.They wrote 35 tracks, recorded 17, and picked the best of them to go on the disc.