hey folks, a few days ago, I ran a comparison between the V3's A/D converter, and the internal converter on a 722.
big thanks to Simon for letting me borrow the 722!!
I did the comp at this show:
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Club d'Elf
March 15, 2007
The Lizard Lounge
Cambridge, MA
Dave Tronzo - slide guitar
Jerry Leake - tablas & percussion
Vicente Lebron - congas & percussion
Mike Rivard - bass & sintir
Dean Johnston - drums
Tom Halter - trumpet
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here's the info on the two sources:
(on-stage) Microtech Gefell m200 > Grace Design Lunatec V3 (S/PDIF out) > Tascam HD-P2 (@ 24 bit, 96 kHz)
(on-stage) Microtech Gefell m200 > Grace Design Lunatec V3 (analog out) > Sound Devices 722 (line-in @ -5dB, 24 bit, 96 kHz)
notes:
the mics were placed on-stage, in an ORTF configuration
these 24 bit, 96 kHz files are identical to the original files, no editing has been done
mics cables were canare starquad
analog interconnect from V3 > 722 was Nick's "hydra" silver-clad cables
the 722 line-in input level was set for -5 dB. That was done so that the 722 levels would be identical to the V3 digital levels.
(see this thread for more info on that:
http://taperssection.com/index.php/topic,80074.0.html)
if it matters, the 722 is running firmware v2.10, and it's got the 2.0 hardware updates
and of course, no editing was done to either source.
as for the levels, in all 4 comparison tracks:
the difference between the "A" sample and the "B" sample RMS average level of left channels are either 0.03 or 0.04 dB
the difference between the "A" sample and the "B" sample RMS average level of right channels are either 0.05 or 0.06 dB
this should definitely be close enough to provide an accurate comparison
there are four samples from each source.
source A and source B
each clip is a minute long
clip "A1" is the exact same minute long segment as clip "B1", etc, etc...
you can download the clips here:
http://www.turtleside.com/misc/v3-722-comp/or, alternative, you can download them via ftp with this info:
ftp.turtleside.com
user name = comp722vsV3@turtleside.com
password = clubdelf
the files are 24/96, so each FLAC file is ~20 MB.
151MB for all 8 files
so, please go ahead and download, compare, and post.
in addition to voting in the poll, please post with your listening gear that you used, and any additional thoughts you have about the two sources.
and of course, if anyone is interested in grabbing the whole show in 24/96, let me know. as I'll probably only be posting the 16/44.1 version on archive.org
enjoy