FOR A NUMBER OF YEARS THE LATVIAN COMPOSER PETERIS VASKS, FAMOUS FOR HIS ATMOSPHERIC COMPOSITIONS FOR STRING ORCHESTRA LIKE 'CANTABILE' AND 'MUSICA DOLOROSA', WORKED AS A DOUBLE BASS PLAYER IN VARIOUS BALTIC ORCHESTRAS. HE COMPOSED THE PRESENT SONATA IN I MONOLOGUE - II FANTASY - III TOCCATA - IV MELODY