Featured Photos: Herbie Hancock at the Sonoma Jazz Festival - May 2008

Herbie Hancock is on the verge of launching an international tour that will last through the summer.

The tour supports Hancock's Grammy-winning album, "River: The Joni Letters."

Hancock will be joined on the tour by songstress Sonya Kitchell, bassist Dave Holland, drummer Vinnie Colaiuta, guitarist Lionel Loueke and vocalist Amy Keys.

SoundSpike's Richard Tafoya caught an early one-off gig with bassist Marcus Miller handling the low end.