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In Reply to: RE: correctly read ??? posted by fmak on December 16, 2014 at 18:50:36
Good golly Miss Molly, lots of wrong in this thread!
Great stuff.
Anyhow all you need is a small grasp of how "digital" works to know that this is complete nonsense.
Your device either reads the disc, or it doesn't.
It simply converts what it reads into an analog waveform. Pits are "zeros", lands are "ones".
It outputs this information in a varying voltage pattern where a voltage above a certain value means one thing, a voltage below a certain value means another, these two voltage levels are separated by voltage that means nothing. That is digital.
Example of a digital format could be
5v = 0
4v = 0
3v = Ignored
2v = 1
1v = 1
So a device that fluctuates between 1v and 4v is just as accurate as a higher powered device that outputs 2v to 5v. They both follow the same discipline.
One pit is not better then another, so long as it is identified as a pit.
Anything that falls between would be ignored and you would have an incomplete file, but the information you do have is correct.
It is not a vinyl record, the source or quality does not matter, so long as it is legible.
The sound does not come from the CD, it is a digital storage medium, it stores commands, which are "repeated" through your computer.
There is no analog chain to preserve.
It is a simple version of Morse Code, that is all.
A DVD uses a smaller wavelength (650 nanometers red) of light to cram more pits and lands into the same area as a CD burned using a 780 nanometer laser.
A BlueRay uses an even smaller wavelength (450 nanometers) to make even smaller pits.
It's not Wizardy.
Follow Ups:
I'm thinking of upgrading the clock in my cd player, will it make a difference to the sound quality and if so why ? Surely the bits will be the same.
http://mqnplayer.blogspot.co.uk/
This can make a huge difference. But the right clock and power supply needs to be chosen.
A good starting point is to use the latest generation of 'Femto' clocks with an adaptor and a fast, ultra low noise PS.
Don't try to squeeze in a large clock assembly.
I spent a couple of years playing with different clocks on different machines, doing FFT measurements on the XOs and PSs while listening.
Fred -
What clocks did you test? What were their output frequencies? What did you use to perform the FFTs? What power supplies did you use to power the clocks?
nt
.
Still need windows 8 OS to run? I have heard a lot of good things about your player but I use XP. But I would sure like to try it.
Your post is a great example of primitive non-experiential "knowledge", which has nothing to do with actual knowledge at all.
Simple question: have you ever, in the years past, compared - on a resolving system - the sound quality of a WAV file, burned to 2 different CD blanks - let's say Fuji vs. Memorex? What was the result?
Because, you know, someone who performed this little experiment, would never post something like you just did.
Could you do everyone a favor, and post ONLY after you gain some actual experience with the matters being discussed?
is worse than none!!!
lol
I could burn a file on a 3.5" floppy disc and you wouldn't be able to tell the difference beyond a coin flip on any system.
Given enough time and a small amount of code, someone could input the information from a song into your computer with a Morse Code Key obtaining a perfect Checksum yielding a file indistinguishable from the source both digitally and audibly.
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