He also played in the Dutch Ballet Orchestra and other orchestras .
After graduation , Altena played in a number of ensembles , such as various formations around Willem Breuker and Theo Loevendie .
Altena also played in the Dutch Ballet Orchestra and other orchestras .
After graduation , Altena played in a number of ensembles , such as various formations around Willem Breuker and Theo Loevendie .