Hi,
We have a USB audio device's product. I want to control speak's
volume with HID(i.e. use external button), but the function in Linux is
not available. I searched some about that in Internet and found that "Linux
(at the operating system kernel level) supports four interfaces to a HID
device - keyboard, mouse, joystick and a generic interface, known as the event
interface". Does it mean Audio's HID is not support? Please give me some
comments. Thanks.
schsu
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