Meshuggah tuning 8-string guitar refers to the unique tuning used by the Swedish progressive metal band Meshuggah. The 8-string guitar tuning in the style of Meshuggah typically adheres to the following configuration: F# (one octave below the 6th string of a standard guitar) B same as the 5th string https://bit.ly/meshuggah-tuning-8-string-interesting-facts