The title alludes obviously to both the sonata form which offers the formal foundation of the work 
as well as to the sonorous mixture of this type of ensemble, with the purpose to bring the percussion 
instruments at the same level of melodicity and expresivity as the piano's and the clarinet's.
In the two sections of the work is used a flexibel structural-modal musical language containing strong 
references to the folkloric ethos and to jazz.