Hi guys, while we're waiting and hoping for native support for USB Audio Class 2 in Microsoft OSes, I hope the group can consider and comment on a few possible ways ahead. Below are some suggestions. But please don't turn this into a discussion of whether or not UAC2 support is needed. This is about the HOW. My background is unfortunately not from the driver programming side of things. My experience is in designing the audio hardware and firmware, and in knowing fairly well what the early adopter and high-end user segments actually want. I can offer specifications and advanced testing work any time. I sell the DAC at www.henryaudio.com. The neat thing with it is that all source code is open, and it supports both UAC1 and UAC2. It's trivial to use it for driver debugging with breakpoints, UART terminal I/O etc. I'll happily lend out this hardware to those of you interested in working towards generic UAC2 support on Widnows. 1) A closed-source virtual audio device which loops what it receives as a Loudspeaker device back as a Microphone device. This virtual driver would be based on DDK code and hence closed source. The virtual audio device would have to support exclusive WASAPI, and the whole signal chain must support an asynchronous USB DAC being the clock master. Pair the virtual audio device with a user-mode program which listens to the Microphone interface and forwards that to an ASIO driver. Such a program can be made open source. A working open source ASIO driver for UAC2 exists at https://github.com/nikkov/Win-Widget. 2) An open source draft for an audio USB driver exists here: https://github.com/borgestrand/winuac2 It is a copy of the GPL Zaudiodriverwin project. Being GPL means its hard to gain MS support for it, BUT it also means the UAC2 code in Linux can be used as an inspiration. 3) Microsoft, would you consider opening up the code for the existing UAC1 driver? Having a working UAC1 starting point will make UAC2 programming easier. 4) Are there group members who would consider opening up their driver code? Not good from a competitive standpoint you say? Consider the marketing effect. This is what I would have done myself if I had the experience. Best regards, Borge ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.com/