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Sony Hard Disk HiFi Audio Recorder System

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pkwok 發表於 2008-6-16 00:12:16 | 顯示全部樓層 |閱讀模式
It can record any audio sources (e.g. CD player, FM/AM tuner, MP3 player, etc..) into your hard disk and perform different treatments such as cut, delete, merge, etc... Also, network with your computer to enhance functionality. Then, connect to your amplifier for listening (e.g. recorded radio programme) or seal into a new CD.

Anyone have any information about the retail prices of the following two items in Hong Kong? Are they sold in Hong Kong?

1) Sony GIGA JUKE™ NAC-HD1E 250GB Hard Disk HiFi Audio System
http://www.advancedmp3players.co.uk/shop/product_info.php?products_id=2481&aff=nextag

2) SONY NACHD1E NETWORK/CD PLAYER & HD RECORDER
http://www.superfi.co.uk/index.cfm/page/moreinfo.cfm/Product_ID/3464


B. regards,

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 樓主| pkwok 發表於 2008-6-16 14:02:57 | 顯示全部樓層
After review the specification in detail, the above two Sony items may be the same item. Previously, think difference because the prices of these two items are different in the following same website:
http://www.nextag.co.uk/audio-disk-hard-recorder/zzukzB1z0--search-html

Another recorder is:
YAMAHA CDRHD1500 CD & HARD DISK RECORDER
http://www.superfi.co.uk/index.cfm/page/moreinfo.cfm/Product_ID/2292

Reference manual:
Sony: http://www.superfi.co.uk/extras/Sony/SONY_NACHD1%20Manual.pdf
Yamaha: http://www.superfi.co.uk/extras/Yamaha/CDRHD1500-manual.pdf

Yamaha has no built-in timer and AM/FM tuner. Hence, need to add external timer and AM/FM tuner to pre-record radio programme. In comparing Sony to Yamaha, Sony provides more functions, but Yamaha is cheaper.

Are they sold in Hong Kong? If yes, where and how much?


B. regards,

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 樓主| pkwok 發表於 2008-6-16 21:45:16 | 顯示全部樓層
Just for reference! It may not be absolutely true which depends on whether you believe or not.

Question #1: Is the digital data in original CD same as the copying data in your hard disk?

Answer #1: Yes!
See statements as below. (Ref: http://www.lessloss.com/about.html)
Digital audio data is 'just' 0's and 1's. There may be many formats (.wav, .aif, CD-audio) but the information is still digital. There is no loss during format conversion, provided the formats don't utilize compression.
Copying CD's (if they aren't damaged physically) is a lossless procedure. You can extract CD-audio with your computer and generate a file on your hard disk. Compare this file with the file created when you extract the same audio using a $30,000 player, the resulting two files are identical. This is proven by countless mathematical experiments and by HEX comparison programs.

Question #2: Will hard disk perform better than CD transport in transmitting digital data to DAC?

Answer #2: Yes!
These comments were done by people in Hong Kong. But, better to express in term of “jitter rate”.
Ref: http://www.odysseyaudiohk.com/cgi-bin/yabb/YaBB.pl?num=1196873451 and
http://www.review33.com/palm/forum_msg_palm1.php?topic=42070215121041&number=97

Question #3: Laser reading mechanisms in all CD transports are digitally perfect, even if they cost as low as $30. Will $30,000 expensive CD transport perform same jitter rate with $30 cheap CD-Rom?

Answer #3: No!
See statements as below. (Ref: http://www.lessloss.com/about.html)
Digitally, a $30 mass-produced CD-Rom at 52x does exactly the same job in a few minutes as a $30,000 CD transport does in real-time. If you don't believe this, then all you need to do is digitally record your favorite tune from a $100 CD player into your computer (provided you have a soundcard and software that doesn't add yet more lies into the equation, which is often the case, so beware!) Then borrow the most expensive CD transport you can get your hands on and repeat the experiment. The resulting sound files aren't just similar, they are identical! This is not a theory. This is proven by much experimentation and mathematics.
But the $30,000 CD player does indeed sound better! How do you get a $30 player to sound the same? The first and most important step is to slave the CD transport to a DAC which is the Digital Master. That's it. This simple step alone is worth half the price of a $30,000 CD transport. (i.e. clock sychronization problem)

Conclusion:
Even if it is true that a HK$500 hard disk performs better than a HK$10,000 CD transport in digital data transmission, this concept is quite difficult accepted by most of HiFi fevers or DIYers in psychological point of view.


B. regards,
 樓主| pkwok 發表於 2008-6-17 15:38:02 | 顯示全部樓層
How computer hard disks work?

1) http://en.wikipedia.org/wiki/Hard_disk_drive
2) http://computer.howstuffworks.com/hard-disk.htm

A concept updated to the above comment in Question #2. Old traditional hard disk used "step motor" to move the head arms to read/write data. In modern hard disk, "voice coil" is used to replace step motor. The voice coil works using electromagnetic attraction and repulsion to move the head arms. Hence, hard disk with voice coil design is more quiet (i.e. low noise), reliable and stable. See photos of step motor and voice coil at http://www.pcguide.com/ref/hdd/op/act_Actuator.htm

Mis-concept updated: There is no motor in most of modern hard disk now.


B. regards,
 樓主| pkwok 發表於 2008-6-17 15:59:34 | 顯示全部樓層
Rewrite the above mis-concept statement as below:

1) There is no step motor in head actuator in most of modern hard disk now, but
2) The spindle motor still exists for turning the hard disk platters. See photo at http://www.pcguide.com/ref/hdd/op/spin.htm

The motion of step motor is discrete at variable speeds, but motion of spindle motor is continous at constant speed. Absence of step motor with design changed to voice coil will let the hard disk more quiet.


B. regards,
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