In Part 1 of Canon 5D Mark II Audio Exposed, I compare the Microtrack II, Zoom H4n, BeachTek DXA-5D, and the juicedLink CX 231 when recording a closely placed shotgun mic.
The only processing of the comparison audio was changing gain to match levels. You can download the uncompressed comparison audio here: p3pictures.com/audio_5d2/AudioExposed_Part1_Boom.zip
Part 2: Camera Mounted Mic - vimeo.com/5388476
Part 3: Wireless Lavalier - vimeo.com/5443143
Part 4: Foley - vimeo.com/5453690
Part 5: Noise - vimeo.com/5474562
Part 6: Conclusions - vimeo.com/5903379