USB Audio 2017-05-12 15:10:01 Hi, Just bought a pair a USB speakers (Logitech S150) for business and for testing.If I plug those speakers on a regular computer, they behave as expected. But If I plug them on a Dell-Wyse Thin-client (running the proprietary Operating System ThinOS), the level +/- and mute buttons don't work well ; Mute and level "-" don't work at all and level "+" does lower the volume... Flabbergasting.So, how USB audio is working ? I thought the the digital audio stream is sent to the device and then a DAC integrated into the USB device renders the analogic to the speakers. Is it more complex than that ? Is there is a bi-directional communication with local audio card for leveling ?