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Topic: Would you recommend ripping Audio from a mounted Audio CD ISO? (Read 5322 times) previous topic - next topic
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Would you recommend ripping Audio from a mounted Audio CD ISO?

Hey Guys,

I was wondering about this for sometime. I use EAC to rip Audio CDs for a while using http://jiggafellz.isa-geek.net/eac/ as a guide and I wanted to know if this is okay to do:

I make an CD ISO copy using Alcohol 120%
Mount the CD ISO at a later date and use EAC to rip it from there.

I heard it is always good to rip from the CD ROM straight but I thought this way would be identical to it. If so, what Offset would I use in this case?

The "SCSIVAX DVD/CD-ROM 2.7a" which is the Alcohol virtual drive is not found in http://www.accuraterip.com/driveoffsets.htm

Thanks,
McoreD

Would you recommend ripping Audio from a mounted Audio CD ISO?

Reply #1 –
Don't do this.

Would you recommend ripping Audio from a mounted Audio CD ISO?

Reply #2 –
Right, don't do it like that. EAC is good because it can detect errors and try to correct them, by rereading and so on.

ISO images aren't made with such attention to detail, so EAC can't help much if the ISO image wasn't properly made to begin with.

Would you recommend ripping Audio from a mounted Audio CD ISO?

Reply #3 –
Yes.... name a method that EAC uses to detect errors, and I'll give you a reason why you need to read the original CD instead of an image file on your hard drive.

In fact if EAC finds errors on a virtual disc, something is very wrong with your computer.

Would you recommend ripping Audio from a mounted Audio CD ISO?

Reply #4 –
OK; great. That's some informative replies there. Thanks guys, before I started to do the mistake.

I see that it defies the purpose of EAC have drive error reading correction abilities.

Would you recommend ripping Audio from a mounted Audio CD ISO?

Reply #5 –
You can use EAC to create CD images (wav & cue) with EAC's error detection and additional AccurateRip support (unsing the latest EAC release, that is).

These wav images can then be either used for mounting (e.g. within Daemon Tools) or losslessly compressed for storage and future use.

Don't use Alcohol, Nero or CloneCD for audio image creation.
The name was Plex The Ripper, not Jack The Ripper

Would you recommend ripping Audio from a mounted Audio CD ISO?

Reply #6 –
Alcohol 120% and Co.'s purpose is to ignore errors in discs since intentional errors are used for copy protection purposes. So thes extraction tools are the exact opposite of EAC.

The latest version of EAC comes with AccurateRip.dll pre-installed, you should use it since it not only gives you a second opinion about the correctness of some discs (namely those in their database), but it will most likely also automatically set up your drive's read offset correction value.

Would you recommend ripping Audio from a mounted Audio CD ISO?

Reply #7 –
Noticing this thread still continues, I'd like to ask: while making an Audio CD ISO using Alcohol 52% in the wizard when you choose Audio CD, Skip Read Errors checkBox sets to False. So if Alcohol 52% makes an ISO this way without interruptions, does this mean we have a 100% Read Errors free Audio CD in hands?

Would you recommend ripping Audio from a mounted Audio CD ISO?

Reply #8 –
There is a great probabillity that if the CD was clean and without scratches, the copy will be ok.

But as all the others said, it's not wise to copy audio CDs in that way.
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Would you recommend ripping Audio from a mounted Audio CD ISO?

Reply #9 –
The reason why EAC should be used is that redbook CD is not really block oriented like data CD or DVD.  Redbook CD contains frames (1/75th of a second) of audio data.  When played with a CD player the disc speed is locked to the exact speed giving the player a constant stream of samples.

However, when a computer is used with block oriented interface, the drive has no solid information which frame to read.  Drives can get it wrong leading to skipped or duplicated frames.  EAC tries to overcome this by reading each frame multiple times and comparing them (I don't know exact algorithm.)  Any software that just reads the disc is on the mercy of the drive to get it right.
Teemu

Would you recommend ripping Audio from a mounted Audio CD ISO?

Reply #10 –
Quote from: eevan on
There is a great probabillity that if the CD was clean and without scratches, the copy will be ok.

Are you sure? I have scratch-free Audio CDs that cannot be ripped error free, no matter how clean the surface is.

While I don't know what Alcohol 120/52%'s error handling strategy is when "ignore read errors" is unticked and it encounters an error, I wouldn't count on it that that it is a secure ripper like EAC, dBpoweramp Music Converter or rubyripper. It's not marketed as a secure ripper, so it is safe to assume that it's not. It's possible that even cdparanoia outperforms Alc's error handling and detection. So unless no-ones tests this and can confirm Alc. is a secure ripper (which I doubt it is): just don't use it for Audio CD. Simple really.

Would you recommend ripping Audio from a mounted Audio CD ISO?

Reply #11 –
Well, I said a 'probabillity'. I'm aware of such discs, but have never encountered one myself ;-) Alcohol is not a secure audio ripper, of course. It relys on the quality and audio reading capabilities of the drive when ripping audio.

Anyway, one can try and see what turns out. If you are stuck with the ISO (or any other image) and don't have the original CD, that is the only thing you can do. Not ripping with dedicated audio ripper, the damage is already done and you can only rely on some luck that it's not noticable :-)
If age or weaknes doe prohibyte bloudletting you must use boxing