MP3 players forum: edirol r1 thd numbers

As I promised earlier I did some evaluation test to the edirol r1 concerning distortion levels and frequency response ,I was realy surprised by the good results received ,the measurement of the thd was done
with and sr780 fft spectrum analizer with the help of the internal frequency generator .
In all the tests the input and output wave was monitored with a digital scope.
using the wavelab 4,I made an 1khz 16 bits
44.1khz -3db amplitude file and uploaded directly to the memory card via the usb link to the r1
1, I measured the distortion ( 2nd and 3rd harmonic) in playback mode and the result amazing 0.01% !!!!
2_ I recorded via the line imput an 1 khz signal with an amplitude of all recording bars less one.
the record/playback with an output signal of 1.5v ptp
was 0.035% !!!! (less than the pmd660)
3 the samne signal was injected at the mic input
to reach all record bars less one ,the result 0,04%
4 the frequency response was done recording various
frequencies from 20hrz to 20khz ,at 20hz -0.2db flat to 20khz with a drop of -1.1db !!!!
is amazing how good is this machine
when checking the frequency response i put also 5hrz
it was replayed without distortion with a moderate attenuation