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Topic: Interpolation of Clipping and Bit-Rate Questions. (Read 7526 times) previous topic - next topic

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Interpolation of Clipping and Bit-Rate Questions.
Reply #25
I'm glad you got it figured out

I'm not even sure what to do if my Pro-Ject started playing fast (or slow.) (That's just one of the nice things about digital; you never have to worry about calibration.) I'm increasingly convinced, nonetheless, that one is so much better served by a good direct drive TT than a belt driven one. ...under most circumstances anyway.
The Loudness War is over. Now it's a hopeless occupation.

Interpolation of Clipping and Bit-Rate Questions.
Reply #26
Hence the stopwatch method.
If you're willing to sacrifice one LP side, a straight radial scratch digitally recorded and analysed in the time domain could be a handy and pretty accurate method. I'm not sure if the scratch will change the speed enough to make the test invalid though.
Adjusting pitch of digital audio is easy but it might be best to get analogue source right. I wonder if pitch inaccuracy affecting the RIAA correction is something to worry about.

Interpolation of Clipping and Bit-Rate Questions.
Reply #27
...I wonder if pitch inaccuracy affecting the RIAA correction is something to worry about.


That is a fine question. Now I'm wondering as well...
The Loudness War is over. Now it's a hopeless occupation.

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Interpolation of Clipping and Bit-Rate Questions.
Reply #28
...I wonder if pitch inaccuracy affecting the RIAA correction is something to worry about.


That is a fine question. Now I'm wondering as well...


There are no sharp "corners" RIAA equalization curve, it's all very gentle and designed to be easily implemented with passive components. I don't think that small frequency shifts like 1% would produce an audible difference. If my calculations are correct then the worst it (1% freq error) would do is a couple lumps in the frequency response at about 0.09 dB or less.