Gilbert Trefzger was born to an Egyptian mother and a Swiss/German father.
He started playing guitar at the age of nine. He studied guitar in the Jazz Department of the University of Music in Basel and in Paris. He is a multi-instrumentalist and plays guitar, steel guitar, aoud (arabic luth) and banjo and performs many diverse styles of music.
His versatility and creative approach has led him to work with and perform with different artists, to collaborate on film soundtracks and also write music for theatre and film scores. He lives in Basel and Berlin.
2016 New video for the Okou Song Seven Suns with the Bow mixed by Robert Harder, new Videos for AFOT with Regina Teichs, guitars for the Track Naught by Kold (Release 2017), guitars on TV Spot from Supreme Music
2015 Aoud and Steelguitar for the new album from Alligatoah, Music for the TV Spot SOS Kinderdorf, Dobro on the track Woanders by Berge, Guitars for the new Series of Jingles for SRF3, Steelguitar for the new Album from Brandy Butler
2014 Music for Broadway Variete, music for the TV Spot 8×4 guitars for the album Haven by Ravi Srinivasan, music for the dance play Nefertiti at Biennale Passages Bielefeld, Oud on the track Adis Abandon by Wood in da Fire
2011 Music for the play Palomares at Theater Neumarkt, Release of the album Rollercoaster by Ernest Saint Laurent, Release of the album Lovies Lied by Tomek Kolczynski, Release of the documentary film Photography As A Journey
2009 The project Okou has signed with AZ Records, album recorded at Sear Sound NYC with producer Jay Newland, bassist Ira Coleman, drummer Andrew Borger, accordionist Brian Mitchell, tubist Dave Bargeron. String arrangements by Gil Goldstein
2008 Okou has signed with Universal Music Publishing France, recordings in the US with producer Jay Newland, guitars on the track Deshalb bin ich hier by Thomas D, music for the doc film Grundeinkommen
2005 Swiss tour with Lovebugs on steelguitar
2004 Swiss and German tour with the Jamaican singer Roy Ellis (Mr. Symarip)