After training at the Franz Liszt Academy of Music, László studied piano with Szendy and composition with Herzfeld and started as a pianist at the Blüthner Orchestra in Berlin in 1915.
According to the studies of the psychologist Georg Anschütz, the mentor of the synaesthesia research of this time, László developed an apparatus for the combination of colored light, slides, moving amorphous and geometrical forms.
Rather, it was a new art genre in which abstract images and sound do not behave supplementarily, but enter into an original and inviolable unity.
[4] In Hollywood from about 1944, he wrote the music for several films such as One Body Too Many (1944),[5] Charlie Chan and the Chinese Cat (1944), Scared Stiff (1945) and Yankee Kafir (1947).
[6] Also, The Great Flamarion (1945), The Amazing Mr. X (1949), Tarzan's Magic Fountain (1948), Night of the Blood Beast (1958), Attack of the Giant Leeches (1959), Beast from Haunted Cave (1959) and The Atomic Submarine (1959), and television series including Rocky Jones, Space Ranger and My Little Margie.