Disable USB ports when nothing is playing?

Acticating usb auto suspend (after deactivating it) shows:

[root@HoerraumLuminare ~]# /opt/RoPieee/lib/enable_usb_auto_suspend
found USB DAC!
id: 20b1:2023
devpath: /sys/bus/usb/devices/1-1.2
auto suspend enabled!