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In Reply to: I am only talking about CD players now... posted by tunenut on January 30, 2003 at 21:05:54:
To test sacd performance with a 1kHz dithered testtone as dsd signal is not logical as dsd should be able to cope with an -90dB testtone at 1kHz on it's own. If dither on a -90dB testtone is needed for good testresults with dsd then sacd would be in big trouble.I think the dither is applied to the 16bit pcm test signal.
And of course the noise is in the dsd signal. And my point is that the dsd noisefloor in that signal is modulated by the signal.
The digital black is just a dsd signal with a signal just high enough to keep the muting circuitry from activating. In effect this is the bottom noise floor of dsd (on that partical player).The question is where the test signal is derived from. From a signalgenerator with noise in it's output or is it a math derived 'ideal' testsignal. In the latter case the noise level should be the same as the bottom noise curve.
If it's from a signal generator the rise in noise level should be the same on different machines asuming the same test disc is used.Frank
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Follow Ups
- It makes no sense... - Frank 04:39:29 01/31/03 (1)
- Re: It makes no sense... - Jim Pearce 08:01:45 01/31/03 (0)
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