from usbh_audio.h:296
typedef struct
{
uint8_t bLength;
uint8_t bDescriptorType;
uint8_t bDescriptorSubtype;
uint8_t bTerminalID;
uint8_t wTerminalType[2];
uint8_t bAssocTerminal;
uint8_t bNrChannels;
uint8_t wChannelConfig[2];
uint8_t iChannelNames;
uint8_t iTerminal;
}
AUDIO_ITDescTypeDef;