Hi,
>From the 24 bit wav file below:-
Perhaps the left channel hiss is greater than the right? This spectrogram s=
hows
the left channel diverging from the right above 8 Khz.
(turn head sideways for those used to seeing them in the normal left to rig=
ht orientation)
http://urlme.net/bl/fre2above8k.png
Above adjusted colour aperture to show the artifact.
http://urlme.net/bl/fre2levssd722average.png
Green/Red =3D FR-2LE
Purp/Orange =3D SD722
SD722 channels show similar freq vs amplitude response.
If the links above dont work / copy & paste them directly to the browser ad=
dress
bar & hit enter.
BR,
Mike.
--- In Rob Danielson <> wrote:
>
> At 3:11 PM -0500 3/20/09, Curt Olson wrote:
> >I made claims about how the FR-2LE compares to SD722. When I made the
> >following test recording a couple years ago, I was absolutely blown
> >away. (Yes, class, the dreaded "tick-tock" test is back!)
> >
> >The first four ticks were recorded with the FR-2LE; second four were
> >recorded with the SD722. Same mics (AT3032s), same mic placement, full
> >gain on both recorders, no EQ. Sorry, but I can't recall whether I had
> >to do any level matching...
> >
> >24-bit WAV file:
> ><http://www.trackseventeen.com/media/tsp/fr2le-sd722.wav>http://www.trac=
kseventeen.com/media/tsp/fr2le-sd722.wav
> >
> >192kbps MP3:
> ><http://www.trackseventeen.com/media/tsp/fr2le-sd722.mp3>http://www.trac=
kseventeen.com/media/tsp/fr2le-sd722.mp3
> >
> >Curt Olson
> >
>
> When I first listened to Curt's test with my aging ears on speakers,
> I didn't notice any difference between the two recorders. When I made
> a sonogram the next morning to see if I had missed anything, I was
> shocked.
>
> To better reveal the performance differences, I edited the ticks so
> the edit point falls in the middle of the room presence between ticks
> 4 and 5 (rather than immediately before 5). The additional clarity in
> the lower mid-range and reduction in hiss in the SD 722 is pretty
> apparent. The uniform noise added above 9K Hz by the Fostex is
> definitely worth further exploration. Curt is conducting a similar
> test again; perhaps others with FR-2LE's might want to see if they
> can duplicate these results.
>
> 1.8mb QuickTime movie plays in a loop:
> http://tinyurl.com/c8lvty
> or
> http://www.uwm.edu/~type/audio-art-tech-gallery/pages/Olson-fr2le-sd722_S=
or_Lrg-present.html
>
> Rob D.
>
>
> --
>
>
>
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