You clearly need to read this article from 2016 (Sound On Sound).

Digital Drive

Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it.

If you haven't read it already. Makes a similar analogy .

(paragraph 4 in the article seems to be missing the micro symbol - depending on which browser you use [default font symbol detection])

"If you scale these dimensions up a million times so that the bumps are about 1.2 metres wide - about the same as the width of the crash barrier down the centre of a motorway - the tracking servos in the laser assembly are performing the equivalent of flying a jumbo jet at three million miles an hour, while keeping the nose wheel aligned to within about 20cm either way directly above the central crash barrier as the motorway winds its way across the countryside.

So we are already talking about mind-blowing precision with unbelievably fast-moving targets - but it doesn't stop here. The inevitable cyclical variations in the amount of power demanded by the tracking and focus servos can result in varying reference voltages in the digital, clocking, and analogue circuitry, if the transport's power-supply system is not carefully designed. That can cause significant problems too, especially if the CD player has an on-board DAC. Prism Sound ran some fascinating tests in 1996 to find out why numerically identical CDs were perceived to sound different when played on various CD systems, and found that power-supply modulation problems played a significant role (www.prismsound.com/m_r_downloads/cdinvest.pdf)."

Big J

"... only a very few individuals understand as yet that personal salvation is a contradiction in terms."

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Follow Ups Full Thread

Topic - If the optical track was freeway size.. how fast, how big the contaminates? - toothpaste 06:45:40 04/16/18 (10)

You clearly need to read this article from 2016 (Sound On Sound). - jusbe 04/24/1811:29:54 04/24/18 (2)

Thanks! nt - toothpaste 11:44:58 04/25/18 (1)

All good! nt - jusbe 07:42:40 04/26/18 (0)

Extrapolating out from there... - acres verde 10:35:05 04/24/18 (1)

mind boggling...... - toothpaste 11:46:09 04/25/18 (0)

RE: If the optical track was freeway size.. how fast, how big the contaminates? - Mr_Lemon 08:08:30 04/16/18 (3)

At the tiny size of CD track, yes speed is 2.7mph. Then scale it up to the size of a freeway.... - toothpaste 09:16:32 04/16/18 (2)

RE: At the tiny size of CD track, yes speed is 2.7mph. Then scale it up to the size of a freeway.... - Mr_Lemon 07:20:09 04/17/18 (1)

I woud scle up the difference in movement. The laser to the track velocity. no radius involved. - toothpaste 14:05:11 04/17/18 (0)

RE: If the optical track was freeway size.. how fast, how big the contaminates? - AbeCollins 07:54:28 04/16/18 (0)

Follow Ups

You clearly need to read this article from 2016 (Sound On Sound). - jusbe 04/24/1811:29:54 04/24/18 (2)

Thanks! nt - toothpaste 11:44:58 04/25/18 (1)

All good! nt - jusbe 07:42:40 04/26/18 (0)

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