* Jeff Buckley ("Grace")
* Natalie Merchant ("Ophelia")
* Bill Laswell ( Operazone, Material a.o.)
* Angelique Kidjo
* Better Than Ezra
* The Cardigans
* Jonatha Brooke
* Buckethead
* Bootsie Collins
* The Swans
* Sly + Robbie
* Shinedown
* Tara McLean
* among many others
Karl Berger recorded and conducted in Woodstock, NY, New York City, Los Angeles, Miami, London(UK), Paris (France), Rome (Italy),Tokyo , Rio de Janeiro, and performed at festivals worldwide.
His recordings and arrangements appear on the record labels
Atlantic, Axiom, Black Saint, Blue Note, Capitol, CBS, Columbia
Double Moon, Douglas Music, Elektra , EMI, Enja, Island, JVC,
Knitting Factory, In&Out, MCA, Milestone, Polygram, Pye , RCA,
SONY, Stockholm, Vogue a.o.