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In Reply to: Re: You have to remember the phase (in)coherence of vinyl posted by Todd Krieger on May 27, 2006 at 18:24:55:
Todd Krieger wrote:"The phase shift of the RIAA curve cancels-out the phase shift of the non-equalized vinyl..... The end result is near-perfect phase response, as long as the post-EQ response is flat."
"Now this does *not* account for any non-linearities caused by a setup that does not optimize playback, nor does it account to FR anomalies in the cartridge, which would introduce phase shifts as well."
Huh? You left out errors in the disc itself, most of which are produced by the cutter head.
I've measured the touted Cardas sweep record with 7 different catridges, (using Cool Edit, Lynx TWO card @ 24 bits and 192K) and one thing all the measurements have in common is a rise starting at ~10K, peaking ~13K, and rapidly declining to a shelf of about -5 dB below reference level above that.
Most of the cartridges, (including some highly touted MC's) gently roll off in the shelf region.
Noise is also a big problem in getting accurate vinyl measurments. The Cardas sweep record isn't particularly quiet, at least my copy.
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Follow Ups
- Re: Nice try... - $orabji! 15:49:35 05/31/06 (0)
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