[wdmaudiodev] Re: Re : Re: Re : Re: USB Audio/WASAPI channel limits?

  • From: "Jerry Evans" <jerry@xxxxxxxxxxx>
  • To: <wdmaudiodev@xxxxxxxxxxxxx>
  • Date: Thu, 13 Feb 2014 19:12:50 -0000

Hello Florian,


I am curious. What can ASIO provide that WASAPI cannot? 






From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Florian Schirmer
Sent: 13 February 2014 18:33
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: Re : Re: Re : Re: USB Audio/WASAPI channel


Having a USB 2 audio class driver won't solve the problem for professional
use. Vendors still need to ship ASIO drivers and i'm not sure if there is a
reasonable way to plug those into the usb class driver. So unless we also
see an audio API fully supporting the professional use case (comparable to
ASIO or CoreAudio) there is probably limited benefit of having an USB 2
audio class driver.





On 13.02.2014, at 19:07, robert.bielik <robert.bielik@xxxxxxxx> wrote:

Touche, but.. how many USB *audio* class specs are there?

Without USB 2 audio, professional applications using WDM are out of the
question. But ok, fair enough, there's always ASIO...



------ Ursprungligt meddelande ------
Från: Tim Roberts 
Datum: 2014-02-13 18:51
Till: wdmaudiodev@xxxxxxxxxxxxx;
Ämne:[wdmaudiodev] Re: Re : Re: USB Audio/WASAPI channel limits?

robert.bielik wrote:

Hmm... USB Audio 2 class is a standardized specification. I would've assumed
that Microsoft generally would be keen on standards compliance? 

The nice thing about standards is that there are so many to choose from.

There are a number of USB class specs that do not have generic in-the-box
drivers from Microsoft.  There has to be a business case to justify the
considerable development and testing expense.  Standards are only
interesting if they are used.  If USB Audio 2 is a niche standard that is
only interesting to a tiny fraction of the market (and the current evidence
suggests that is the case), then it doesn't make sense to develop a class
driver.  To four decimal places, Audio Class 1.0 satisfies 100% of the
Windows users in the world.

As a point of comparison, remember that Visual C++ STILL does not support
the C99 ISO standard, and there are a lot more C99 developers than there are
USB Audio 2 devices.

Tim Roberts, timr@xxxxxxxxx
Providenza & Boekelheide, Inc.

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