Szabolcs Sandoly wrote: > > > > > We are in a process of developing drivers for a novel wireless headset > and I have a concern regarding streaming SPEEX encoded voice over USB > Audio class 1.0. Since SPEEX (or other voice coder) is not a supported > format according to the USB Audio 1.0 specification, I am wondering if > is there any trick to solve this streaming problem. > The USB Audio Class Formats spec says in section 3, "It is always possible to use vendor-specific definitions if the above procedure [for registering a new format] is considered unsatisfactory." However, I don't know whether usbaudio.sys will know what to do with that. Usbaudio.sys is a fabulous resource, as long as you don't push too hard on the sharp edges. It may be that you need to use a filter driver to coerce usbaudio into handling things for you. -- Tim Roberts, timr@xxxxxxxxx Providenza & Boekelheide, Inc.