Video: Dave Grohl talks about the influence of Soundgarden's album 'Superunknown' April 29, 2014 Jeff Ansari Dave Grohl talks about the influence of Soundgarden's album 'Superunknown' Pre-order the 20th anniversary edition of Superunknown, available June 4th: http://smarturl.it/superunknown20 Source: Soundgarden YouTube Channel