[wdmaudiodev] Re: Need USB Audio device to not be the default speaker at plug-in
- From: "Perry, Chris" <Chris_Perry@xxxxxxxx>
- To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Fri, 15 May 2009 07:18:27 -0400
David,
If the USB device publishes itself as a mass storage device then AUTORUN.INF
will not run on Windows 7 (thanks Conficker).
See:
http://blogs.technet.com/srd/archive/2009/04/28/autorun-changes-in-windows-7.aspx
There is a workaround where the USB device can pose as a CD\DVD drive. This is
called U3 or "StartKey".
See: http://en.wikipedia.org/wiki/U3
-Chris
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of David A. Hoatson
Sent: Thursday, May 14, 2009 11:49 PM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: Need USB Audio device to not be the default speaker
at plug-in
If you had a composite device that also supported USB disk, couldn't you have
an AUTORUN.INF that would do exactly what you want?
Thank you,
David A. Hoatson
Lynx Studio Technology, Inc.
www.lynxstudio.com<http://www.lynxstudio.com/>
________________________________
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Perry, Chris
Sent: Thursday, May 14, 2009 10:48 AM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: Need USB Audio device to not be the default speaker
at plug-in
David,
The idea is that when the USB phone is plugged into the USB port the image of a
phone appears on the desktop and just works.
When you click on this image it opens up. If you wish to make a call you can
use the mouse to click out the number on the displayed number pad image
or you can just type the phone number out on your computer keyboard. If I am
interfacing with the displayed
phone application I expect to find things happening on my USB hardware (phone).
If my USB hardware actually is a phone I could also
just press the keys on it to dial out.
I simply want to plug in a USB device and have it launch an application from
the device firmware with no other user
intervention needed.
This means any drivers, icons, or other pieces needed on the PC will all come
from the USB device. My understanding is that Microsoft has
added OS Descriptors that can be bundled with the standard USB descriptors in
the USB firmware to make this sort of thing happen.
So everything should be seamless except for the unfortunate issue of the device
becoming a default speaker if the USB descriptors say
it is a speaker.
So that it will not become a default speaker when plugged in, I need to know
what "USB playback device category" should my USB descriptors present this USB
audio device as, assuming this is the "official" method to prevent an audio
device from becoming the default.
-Chris
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of David A. Hoatson
Sent: Thursday, May 14, 2009 1:20 PM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: Need USB Audio device to not be the default speaker
at plug-in
Wouldn't this be simple to accomplish by having a device selection in the USB
phone application? I know this seems simplistic, but it seems there have been
so many things taken out of the end-users hands that we are now left trying to
program around an array of limitations instead of trusting that the user really
does know what they are doing.
Alternatively the OS would have to remember the "default" audio device for each
application independently.
Thank you,
David A. Hoatson
Lynx Studio Technology, Inc.
www.lynxstudio.com<http://www.lynxstudio.com/>
________________________________
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Perry, Chris
Sent: Thursday, May 14, 2009 9:52 AM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: Need USB Audio device to not be the default speaker
at plug-in
Tim, you got me on this one :)
Let's change the scenario to a USB phone. We only want the speaker in the phone
to
sound when a phone call is coming in or you are actively engaged in a phone
conversation.
Meanwhile the regular PC speakers play back the usual dings and dongs and
perhaps a little Mozart?
-Chris Perry
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Tim Roberts
Sent: Thursday, May 14, 2009 12:42 PM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: Need USB Audio device to not be the default speaker
at plug-in
Perry, Chris wrote:
Suppose I am developing a USB based toy gun that comes bundled with a game.
When the user plugs in
the USB gun, the ultimate user experience would be for the game application to
launch and only render
gun sounds sent from the game application. Ideally I don't want the USB device
to show up as a device
that a user can select for as a generic speaker using the control panel applet.
Why not? I mean, what's the worst case scenario? Some 14-year-old would think
it was cool to have music playing out of his gun, and then he unplugs it and
goes back to his normal audio device.
I just don't see why this is a situation that is worth worrying about. You
wouldn't MAKE yourself the preferred device, but if some user wants to do so,
he gets what he deserves.
Right?
--
Tim Roberts, timr@xxxxxxxxx<mailto:timr@xxxxxxxxx>
Providenza & Boekelheide, Inc.
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