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Old 11th July 2013, 06:13 PM   #41741
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Yeah. Hell of a job
If you want I can sell you some seeds for a money tree.
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Old 11th July 2013, 06:42 PM   #41742
jcx is offline jcx  United States
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wasn't that magic beans?, works better if your name is Jack...

...don't mind commiting a few felonies to reailze your profits
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Old 11th July 2013, 07:43 PM   #41743
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wasn't that magic beans?, works better if your name is Jack...

...don't mind commiting a few felonies to reailze your profits
You don't know till you try it! I can give you testimonials if you like.
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Old 11th July 2013, 07:58 PM   #41744
bcarso is offline bcarso  United States
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Is this what people mean when they tell me I don't know Jack?
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Old 11th July 2013, 08:11 PM   #41745
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Is this what people mean when they tell me I don't know Jack?
If you hang around the pro world you should at least know WJHW!
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Old 11th July 2013, 09:27 PM   #41746
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Oh, JJBC
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Old 12th July 2013, 11:11 AM   #41747
hhoyt is offline hhoyt  United States
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Default CD Redux

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Originally Posted by jan.didden View Post
Maybe if you have a DAC and analog output circuitry in the same box, fed by the same mediocre power supply, there can be an impact. But it is straight-forward engineering to fix those things at the design stage. But, yes, many modders and tweakers do not know about straightforward engineering, and they make changes that have an audible impact and call it 'improvement'....

Anyway, if you look at the geometry of a tracking laser, with a narrow beam riding fractions of a mm above the surface, it is extremely unlikely that any reflections alter the focus.


BTW it is short bumps and long bumps for the laser, not pits and land.

jan
Sorry for posting so late...This whole subject has been driven into the dirt so many times. In a LOT of inexpensive players ripple and trash from the transport (spindle motor/focus/tracking coil amps) can be heard in the noise floor of the audio, this is a flaw in player design. Attempting to fix it with a green pen on the CD is like fixing a broken stylus with a coin on the tonearm.

BTW Jan, the EFM data is encoded in the timing recovered from the transitions from both the pit>land and land>pit. The ONLY way ANY disc related parameters affect the output is in the form of hard uncorrectable errors. Period. All else is corrected by definition. Any jitter in the output is due to internal clocking issues not the disc.

Howie

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Last edited by hhoyt; 12th July 2013 at 11:17 AM.
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Old 12th July 2013, 12:29 PM   #41748
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Originally Posted by hhoyt View Post
The ONLY way ANY disc related parameters affect the output is in the form of hard uncorrectable errors. Period. All else is corrected by definition. Any jitter in the output is due to internal clocking issues not the disc.

Howie

Howard Hoyt
Dir. of Engineering
AMI, LLC
CD/DVD Replicators since 1993
Indeed, well said. Thanks.

jan
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Old 13th July 2013, 04:39 PM   #41749
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Is JC still without password? Isn't this where he usually says things have calmed down so it's time for some more old stories?
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Old 13th July 2013, 06:41 PM   #41750
bcarso is offline bcarso  United States
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Is JC still without password? Isn't this where he usually says things have calmed down so it's time for some more old stories?
Maybe we've all run out of things to say and people to insult.

Although --- I could invite comments on Art Dudley's recent review in Stereophile of the Ayre AX-5 integrated amplifier, which actually attempts to describe the output stage topology in sufficient detail to allow a schematic to be drawn, I think practically a first for the magazine. I searched and found that Hansen has also talked about it in Audio Asylum, helpfully provides a schematic, and speculates about why it sounds better. Amusingly, Dudley describes it as being an "all-but-forgotten technology". This will come as a surprise to a great many of us who have been using it, albeit not strictly as a final high-power output stage, for decades.
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