[JohnR]

I've written this note on my HifiZine blog:

http://johnr.hifizine.com/2012/09/19/a-simple-test-protocol-for-usbfirewire-soundcards/

I'd appreciate any comments/thoughts/questions.

The followup article with full example will be up shortly.

[JohnR]

Here is an example of applying this protocol:

http://johnr.hifizine.com/2012/09/19/a-sample-soundcard-measurement-edirol-ua-25ex/

That is my "old" soundcard. It leaves much to be desired, but I decided to use it as the test case so I could document it. The performance of the new hardware you can get these days for a low price is astonishing. More on that later.