Hi, DJ, If you want, I can drop off the device in your office and give you the datasheet for it. I pesonally don't know a lot of the details about the device, so I don't want to guess. --- DJ Sisolak <dsisolak@xxxxxxxxxxxxxxxxxxxxxx> wrote: > If this was working in XP using the class driver > then it should work in Vista using the class driver. > If not, we broke something and it needs to be fixed > (the caveat being that the Vista class driver does > check for more descriptor/functional anomalies and > errors when determining class compliancy). I need to > know the specifics about the device so I can dig > into this further if that is possible. I don't want > to distress anyone either. J > > Sam, could you send me more info about the device in > question directly? > > Thanks, > DJ Sisolak > > ________________________________ > From: wdmaudiodev-bounce@xxxxxxxxxxxxx > [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf > Of Sam Tertzakian > Sent: Friday, March 24, 2006 2:48 PM > To: wdmaudiodev@xxxxxxxxxxxxx > Subject: [wdmaudiodev] Re: USBAudio Driver Fails to > Start In Vista > > Yes, I believe it is "a USB 2.0 device, on a USB 2.0 > bus, running USB Audio Class 1.0, at the speed of > USB 1.1.". > > It is a part of a USB Composite Device composed of > two devices, video and audio. > > "Is the firmware really that hard to change?" > > Well what about all the people who have a device in > their house that used to work on XP but now does not > work under Vista? It is not changing the firmware > that is difficult...it is getting the change to the > thousands of people that have the device in their > house. Not only that, this device does not have > firmware...it is a chip. > > I think it is going to be very distressing for > people who have this problem. I can tell you that I > am distressed over it. This is the last thing I > expected to fail...since the hardware is using the > MSFT in box driver directly. > > All of this started because I was trying to answer > Andrew's question about stereo devices...and I > happen to have a USB Audio stereo device. > > ________________________________ > From: wdmaudiodev-bounce@xxxxxxxxxxxxx > [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf > Of Tim Roberts > Sent: Friday, March 24, 2006 2:24 PM > To: wdmaudiodev@xxxxxxxxxxxxx > Subject: [wdmaudiodev] Re: USBAudio Driver Fails to > Start In Vista > > Sam Tertzakian wrote: > Hi, Hakon, > > Yes, it must be a USB 1.1 Audio on a USB 2.0 Bus. > > Let's be very precise: we're talking about a USB 2.0 > device, on a USB 2.0 bus, running USB Audio Class > 1.0, at the speed of USB 1.1. Right? There is no > "USB 1.1 Audio". > > > When I load it in XP it says, "USB Audio" in device > manager and for location it says "Location 0 (USB > 2.0 Video)". > > Video? Really? > > > So are you saying that the firmware needs to be > changed even thought it works fine under XP (to > specify an interval of 8 for the interface so it > uses the same 1ms data distribution of an USB 1.1 > device)? > > The EHCI driver will support iso pipes at high > speed. USBAUDIO.SYS, which is specific to audio > class, apparently will not. To support more than > one packet per frame, the requests have to be > submitted in multiples of 8. As I recall, > USBAUDIO.SYS submits 10 packets per request. That > doesn't work. > > > Is it possible to write a Filter Driver to correct > this problem? > > I don't think so. Although many descriptor problems > can be fixed, in this case you'd have to rewrite the > device descriptor before it went in to EHCI. Is the > firmware really that hard to change? > > -- > > Tim Roberts, timr@xxxxxxxxx<mailto:timr@xxxxxxxxx> > > Providenza & Boekelheide, Inc. > ****************** 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/