I recently tried testing my fireface 800 as shown on
http://www.gearslutz.com/board/gear-sho … hread.html
to verify that the RME converters really were as poor quality as shown in the results.
What I found is quite shocking.
Here is a pic of the initial test tone and also the test tone, after going out through FF out 1 & 2 and then back into the DAW (Samplitude in this case but also tried with Protools and Cubase) . The link is to the gearslutz thread as I couldn't upload here.

http://www.gearslutz.com/board/attachme … oise01.wav

http://www.gearslutz.com/board/attachme … oise02.wav

Notice the tone that occurs before the main test tone starts. I'm hoping there is something wrong with the way I'm doing this test or otherwise something that can be fixed as if not I definitely won't be using FF800 for much longer if this is "normal"

cheers  Greg