[wdmaudiodev] Re: Why would you want USB Audio 2.0 in Windows?
- From: Clemens Ladisch <clemens@xxxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Thu, 19 Nov 2009 08:49:28 +0100
Tim Roberts wrote:
> Clemens Ladisch wrote:
> > And for a purely technical reason: High-speed USB audio devices do not
> > eat as much bandwith on the bus, so they work better together with other
> > devices.
>
> Well, this statement is not quite accurate. [...]
> having a full-speed device on a high-speed controller doesn't have any
> more impact than a high-speed device of the same rate.
It still impacts any other full- or low-speed devices on that controller
if there aren't separate transaction translators for each port.
> Further, it's quite possible to have a USB Audio 1.0 device run at high
> speed, as long as your isochronous interval is not smaller than 1 per
> frame.
I wish devices would support high speed. Have you ever seen such an
audio device (i.e., class-compliant, not with custom drivers)?
Regards,
Clemens
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