Westerveld performs regularly with his Intonarumori in collaboration with Dutch sound artist Yuri Landman .
Westerveld has also made a few open variants with the sound system visible from the outside .
Westerveld performs regularly with Westerveld 's Intonarumori in collaboration with Dutch sound artist Yuri Landman .
Westerveld has also made a few open variants with the sound system visible from the outside .