He is best known as the bassist in the band Lava,[3] but was also recognized as music producer, musician and songwriter for other artists like Randy Crawford, Mezzoforte and Sissel Kyrkjebø.
[4] Graf was raised in a musical family and was greatly inspired by his older brother Haakon known from bands like 'Ruphus', 'Hawk on Flight', and collaborations with such as Terje Rypdal and Jan Garbarek.
In 1974 he substituted the trumpet to bass guitar and started the following year a rock band together with the guitarist Marius Müller.
Graf was among the first funk bassists in Norway that restrained slap and snap technique, and the artist and vocalist Alex, or Alex Naumik Sandøy, who was among the first artists to introduced the funk rock in Norway, hired him to play on her album Daddy Child, because her bass player and producer Svein Gundersen failed to play this new style.
Otherwise contributed Graf as a studio musician with artists like Sissel Kyrkjebø, Randy Crawford and Elisabeth Andreassen.
This led to a lot of activity on the Norwegian music scene, and appearances on NRK television along with Hanne Boel, among others.
In 1996 he produced the album I evighet by Elisabeth Andreassen, who received second place in the international Melodi Grand Prix final in Oslo Spektrum.
In the early 1990s he was oriented towards Latin music within the trio 'Some Like It Hot' including Lakki Patey (band leader) and Sergio Gonzales (reunited in 2004).
[1] In 2001 Graf finally found time to record a new solo album Oddity Two Acceptance, where he played almost all the instruments by himself.