Andrea Gabrielli, uncle to the more famous Giovanni Gabrieli, composed this wonderful brass composition "Ricercare Primo Tono Brass". The ricercare is a counterpoint form, originally improvisatory in style, these embellished, unaccompanied melodies were similar to preludes of the same period. From the late 16th-century, the name became associated also with contrapuntal polyphonic writing, first in two parts and later expanding to four.
In this work the theme is restarted many times in different tempo relationships, ever changing throughout the work. Here the brass quartet is performed by the following GPO instruments;
Trumpet 1 Player 1
Trumpet 2 Player 1
French Horn 1 Player 1
Tenor Trombone 1