Bass Transcription of Rick "Sav" Savage's bass part in the studio version of Rocket by Def Leppard off their 1987 studio album "Hysteria" Score has a 4 string and a 5 string notation. The only difference between them is the octave of the low D in the Pre Chorus. Most commonly, people will have a 4 string to play it on, but Sav uses a 5 string bass