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Again one with disort

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Orava
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Orava Posted: Mon, Sep 28 2015 1:27 PM

Again, one CD with baaad reproduction with computer, but good in Beogram. What is matter with these?

If someone have "Permanent: Joy Division 1995" CD I would be intrested to hear do others have problems with it.

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tournedos
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tournedos replied on Mon, Sep 28 2015 2:35 PM

Copy protection?

--mika

Jeff
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Jeff replied on Mon, Sep 28 2015 4:01 PM

Probably something like tracking or error correction, maybe arising from bad tracking. I've found more than a few computer optical drives don't deal with slightly out of spec CDs well at all, which is odd, as I'd have thought they would have better error correction with more processing power. I think a lot of it has more to do with cheaper optical disc transports, often compromised as in laptops due to size and weight constraints, that don't track the discs as well.

I've gotten to where when ripping I always turn on "error correction" even though it makes the rips take longer, as I've had a number of CDs ripped to iTunes turn out distorted and bad, and had to go back and re-rip with correction on. These same discs played fine on every CD player I've tried them on, from Denon to Philips to B&O.

Jeff

I'm afraid I'm recovering from the BeoVirus. Sad

Mark
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Mark replied on Mon, Sep 28 2015 7:38 PM
I've seen this too and just thought cheap cd writer in Computer in new computer.

(if the government are reading this thread I have never knowingly ripped a cd and many a time woken next to my computer only to find my iTunes library has expanded)

we tend to forget there is more to design than designing.

Jeff
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Jeff replied on Mon, Sep 28 2015 8:21 PM

Mark:

(if the government are reading this thread I have never knowingly ripped a cd and many a time woken next to my computer only to find my iTunes library has expanded)

Damned hackers anyway, loading up your PC with music when you're not looking! Whistle

In the US the similar statement is usually about guns. Like, to anyone monitoring my mail, I lost all of my guns in a tragic boating accident.

But back to the original topic, I strongly suspect it's mechanical and optical tracking issues with cheap drives. I've had CDs that play fine cause all manner of vibration and such when running in my laptop drives over the years. Also, perhaps the error correction of a PC for real time reading of a CD is not as robust as a stand alone player? I know if you look at the transports most dedicated audio CD players seem a lot more robust and well built than most laptop drives. Been so long since I've had a desktop I can't really comment on that now.

Jeff

I'm afraid I'm recovering from the BeoVirus. Sad

Orava
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Orava replied on Thu, Oct 1 2015 8:28 AM

Jeff:

Mark:

(if the government are reading this thread I have never knowingly ripped a cd and many a time woken next to my computer only to find my iTunes library has expanded)

Damned hackers anyway, loading up your PC with music when you're not looking! Whistle

In the US the similar statement is usually about guns. Like, to anyone monitoring my mail, I lost all of my guns in a tragic boating accident.

But back to the original topic, I strongly suspect it's mechanical and optical tracking issues with cheap drives. I've had CDs that play fine cause all manner of vibration and such when running in my laptop drives over the years. Also, perhaps the error correction of a PC for real time reading of a CD is not as robust as a stand alone player? I know if you look at the transports most dedicated audio CD players seem a lot more robust and well built than most laptop drives. Been so long since I've had a desktop I can't really comment on that now.

Yes it might be, but in suprisingly many drives... Could it be something to do with SATA? Because I found sound to be ok in cheap USB drive Confused

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Jeff
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Jeff replied on Thu, Oct 1 2015 2:48 PM

I meant cheap optical drives, though I guess if a HD had vibration issues it could transfer to the optical drive and interfere with tracking. Mostly what I've experienced is vibration in the optical drive. Some discs and drives seem to spin up with only the usual noise of the airflow, whereas some seem to vibrate like crazy and won't even load/read a CD or DVD that another optical disk drive will.

Also thinking about it, most PC drives read at many times what a CD player does, they are designed to read and write at multiples of the basic CD speed to make data transfer faster, perhaps that also leads to another possibility of errors in reading if there are anomalies on the disc you're reading.

Jeff

I'm afraid I'm recovering from the BeoVirus. Sad

Orava
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Orava replied on Fri, Oct 2 2015 7:07 AM

So did I, optical :) It does not matter what speed I told ripper to use, same disort happens. I just wonder why my two different USB drives do the job without problems, could it be SATA used by internal CD drive causing problems...

 blah-blah and photographs as needed

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