Still that private concert. Solis Lacus invites Marc Moulin (keyboards, leader of Placebo) to join for a few numbers. Jam session time. Marc Moulin's Placebo and Michel Herr's Solis Lacus were probably the most influential jazz fusion bands in the seventies in Belgium. (Michel even briefly played piano with Placebo, for a short period, next to Marc Moulin on keyboards) Michel Herr (keyboards), Marc Moulin (keyboards). Around 1975.