Propeller Head Plaza

Interesting.......

75.214.255.240

In Reply to: RE: This not a clue, this is reality. posted by gymwear5@hotmail.com on March 20, 2008 at 21:43:13

"Ditto here, At Bruel and Kjaer I can measure the difference in signal with any signal, even music at either end of a cable - loaded by only a cable to a non-coherent power level of down to over -120dB below the signal level....."
Since the S/N ratio of most audio signals doesn't come close to that, I wonder if this could actually be measured with any degree of correlation using an induced test signal.
"The only limitation in my measurement system is its 25.6KHz aliasing filters."
Is this a digital "anti-aliasing" filter by chance? The frequency doesn't relate the established sample rates (32 kHz, 44.1 kHz, 48 kHz, etc.).....
I ask because if it is digital, it would render THD measurements above 12.8 kHz useless, because the THD components would be effectively removed by the above stated filter. And for lower frequency signals, the higher-order THD components would be removed as well. Any harmonic component that happens to be outside the digital filter's passband.

Edits: 03/20/08

Follow Ups:

RE: Interesting....... - gymwear5@hotmail.com 07:28:45 03/24/08 (0)

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