[M480 USB Audio Codec and HID Composite Device

• Application: This example code uses M480 MCU and NAU88L25 audio codec device to implement an USB composite device that based on the USB audio class 1.0 (UAC1.0) and HID class.
• BSP Version: M480 Series BSP CMSIS V3.03.001
• Hardware: NuMaker-PFM-M487 V3.0
  

This example code uses M480 MCU and on-board two key buttons and a NAU88L25 audio codec device to implement an USB composite device that based on the UAC1.0 (USB Audio Class 1.0) and HID class specification. The HID class is for reporting the key buttons inputs to control the play/pause state and volume up of multimedia functions thru the USB protocol.

You can download the sample code at https://www.nuvoton.com/resource-downlo ... 1222112219

The PC's or phone's volume show changed, but the really out sound's volume was no change.