Logitech Z10 USB speakers need a volume change before audio works

Hi,

I've a set of Logitech Z10 USB speakers, which act as a USB soundcard.

They have this weird glitch where after turning off my PC (and their power-supply as well) and then turning things back on, they are silent until I change the PCM volume control for the speakers inside alsa-mixer.

It seems like they need some "set-volume" command to be send over the USB bus to unmute them when initially powered-up / turned on.

Is their some existing usb-audio quirk which I can try to work around this?

Regards,

Hans