He worked with Bill Laswell, Lisa Gerrard, Serj Tankian from System of a Down, Elisa, Ben Harper, Hamid Drake, Nils Petter Molvær, Eivind Aarset, Jamie Saft, Pat Mastelotto from King Crimson, Eraldo Bernocchi, Colin Edwin from Porcupine Tree, Markus Stockhausen, Kenneth Kapstad from Motorpsycho, Tony Wakeford, Trevor Dunn, Giovanni Lindo Ferretti, Raiz, Ambrogio Sparagna, Faraualla, Enrico Gabrielli, Sigillum S, Ephel Duath, Gianluca Petrella, Fabrizio Puglisi, Ståle Storlokken and Carmelo Pipitone.

Singer-composer Lorenzo Esposito Fornasari has made his mark as a singer and producer through a series of releases, including Obake's Draugr, Seven Mutations and their 2011 self-titled debut, Owls’ The Night Stays, O.R.k.

In 2007 he took part in the Somma[7] project with Eraldo Bernocchi, Bill Laswell, Raiz, Hamid Drake, Nils Petter Molvær, Faraualla and seven Tibetan Monks.

[17] Pat Mastelotto, Jamie Saft, Gianluca Petrella, Eivind Aarset, Cristiano Calcagnile, Fabrizio Puglisi, Sandro Satta and Simone Cavina took part in this studio album as well.

In 2015 Lef, Pat Mastelotto from King Crimson, Colin Edwin from Porcupine Tree and Carmelo Pipitone from Marta Sui Tubi produced the album "INFLAMED RIDES" as O.R.k.

But the pervasive intensity of the record comes in particular from the performance of vocalist Lorenzo Esposito Fornasari, who not only presents himself as a master of his craft, but also brings an almost frightening amount of emotions.

He sounds in many places like a rebirth of SOUNDGARDEN frontman Chris Cornell, when he flies full of passion into high, rough fields.Comprised of monstrously prolific Zu bassist Massimo Pupillo, Sigillum-S founder and noted experimental guitarist Eraldo Bernocchi – whom you may also know from his Mick Harris collaborations – drummer Balázs Pándi, and shapeshifting vocalist Lorenzo Esposito Fornasari, Obake operate in the twilight area between 'art' and sludge.

His hollow, tombstone-scraping croak is the equal of any 'Brutal Death Metal' grunter, and his powerful baritone like a dark twin to the similarly gifted Mike Patton.

Fornasari elevates what would already be a seriously tasty musical proposition into a must-hear.Since 2005, Lef composed the score for over 80 commercials for many brands: Louis Vuitton, Varilux, Essilor, Bolon, Mutti, Romerquelle, Harmonie Mutuelle, Kodak, Minute Maid, Récré O'lé – Mont Blanc, Chevrolet, Imetec, Valfrutta, Valsoia, Well, Maya beauty Engineering, Tetley, Cofidis, Harry, Dasani, Ferrari, Vileda, Alexa, Barilla.