Arising out of the avant-garde jazz tradition, a particular genre of solo saxophone music has emerged that combines stylistic attributes of avant-garde jazz and improvisation with minimalism, and is dependent on circular breathing, harmonic manipulation, and other techniques. To distinguish the music and the saxophonists and composers associated with it I have referred to this genre as "post avant-garde." With its roots ultimately in avant-garde jazz of the 1960s, this genre arose through the solo improvisation work of Evan Parker from the 1970s to present, and the music has since been an influence on the work of Colin Stetson and other artists, as well as composers including Gordon Fitzell and Alex Mincek. This document examines a previously unacknowledged but distinct genre of solo saxophone music, as well as the music of associated artists and composers.

This Diploma thesis deals with methods that increase efficiency of transistor amplifiers. In the first part of the thesis we describe theoretical background of the constructions of power amplifiers. At first we deal with the classical method that is concerned with a change of position of the static operating point. Secondly we cover the multi harmonic manipulation method (MHM). This method is concerned with a proper loading of particular harmonic components and consequential shaping of voltage runs and currents on the collector. In the second part of the work we have constructed the substitutes of particular accesses. Constructed classes are AB, F and FMHM. Basic S parameters and output signal spectrum were measured. We can see from the calculated efficiencies AB = 11%, F = 16% a Fmhm = 18%, big increase of efficiency F and FMHM only by changing output network.