hi~ all I have developed USB firmware. It send audio stream from imbedded board to PC. But I need PC to send some short packet to imbedded board. I want USB device operate as HID and audio(isochronous IN) at the same time. And, I can not develop Windows device driver. So, I need to use some profile supported by windows default driver. Can I get some usefull USB prifile?? Thanks~!