On Tue, Jul 13, 2010 at 05:55:21PM +0200, peters@schwertfisch.de wrote:
quoted text
> Jacob Meuser <jakemsr@sdf.lonestar.org> wrote:
> 
> > E-Mu 0202 USB.  it was a gift from patrick keshishian (thanks!).
> >
> > it's also a USB 2.0 device, so there's also USB 2.0 support for uaudio
> > in that patchset.  the 0202 also uses a sync endpoint for playback, so
> > that's finally implemented (the first implementation for *BSD, btw).
> 
> Does this mean that any USB 2.0 audio device should be supported in
> future releases of OpenBSD, e.g., the devices from this list:
> http://www.tweakheadz.com/audio_interface_usb2_comparison_chart.htm

not necessarily, but it does mean there would be less work ... much less
work for the other E-Mu devices listed there ;)

it really depends whether or not the devices are USB Audio 1.x compliant.
for the most part, the E-Mu devices are.  there is a USB Audio 2.x
standard now, which mostly just builds on the USB Audio 1.0 standard
but does change a few things.  it's my understanding that very few
devices are using the USB Audio 2.x standard, but that's based on
hearsay.

to be clear, a device can be USB 2.x compliant and USB Audio 1.x
compliant at the same time.  there is a small issue with that though:
USB Audio 1.x didn't predict how USB 2.x would work, so there is a
bit of wiggle room as to what "USB packet" and "USB frame" mean in
that case.

-- 
jakemsr@sdf.lonestar.org
SDF Public Access UNIX System - http://sdf.lonestar.org