Jim Henderson wrote:
...
> Actually, I was surprised that the Amazon downloadable Complete LOTR 
> soundtracks are in MP3 format.  I don't *think* there's any DRM involved 
> (which was really surprising).

But maybe they can tell who bought the mp3 file by looking at it...

http://www.google.com/search?q=mp3+watermark+amazon

-- 
Tor Olav
http://subcube.com

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nemesis wrote:
> If you think he's a madman for that one, wait until you hear some pieces from


I was blown away the first time I listened through that while following 
along in with the score.  There was so much that I missing that I was 
astounded by the technical virtuosity (I think it's also fantastic music 
on the non-technical side as well of course).

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Warp wrote:
>   Of course in the case of music you don't need any encryption key, as
> the decryption key is enough to do what you want. The only way to protect
> that is to protect the decryption key and the decryption process in such
> way that you can't get hold of it.

You also have to protect the decrypted content, which is rather 
difficult to accomplish without corrupting every bit of hardware and 
software through which it flows.

(Maybe that's what you meant by "decryption process" tho.)

-- 
   Darren New / San Diego, CA, USA (PST)
     On what day did God create the body thetans?

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Orchid XP v7 wrote:
> Nicolas Alvarez wrote:

>>> I'm not seeing a way this can be made to work properly...
>>
>> But it has been done, and it works, so how about doing some research?
>>
>> http://en.wikipedia.org/wiki/FairPlay#How_it_works
> 
> Right. So the decryption key is stored seperately from the actual file. 
> Thus, all you have to do is figure out how to copy the decryption key as 
> well and you can copy the data to as many million iPods as you want. QED.

Exactly.  Indeed, scroll down to the next section. :-)

-- 
   Darren New / San Diego, CA, USA (PST)
     On what day did God create the body thetans?

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On Fri, 08 Feb 2008 23:20:53 +0100, Tor Olav Kristensen wrote:

> Jim Henderson wrote:
> ...
>> Actually, I was surprised that the Amazon downloadable Complete LOTR
>> soundtracks are in MP3 format.  I don't *think* there's any DRM
>> involved (which was really surprising).
> 
> But maybe they can tell who bought the mp3 file by looking at it...
> 
> http://www.google.com/search?q=mp3+watermark+amazon

I'm sure they probably can.  That's a bit different than DRM, though, 
which has the explicit stated goal of preventing people from 
"inappropriate use".  Watermarking allows them to act reactivley - and I 
believe is fairly easy to remove anyways...

mplayer -ao pcm:file=temp.wav file.mp3
lame -h temp.wav file-without-watermark.mp3

(Might have the parameters wrong, but I think you know what I mean).

Jim

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On Fri, 08 Feb 2008 21:35:37 +0000, Orchid XP v7 wrote:

> Jim Henderson wrote:
> 
>> Yep.  To the untrained ear, it can be hard to tell the difference.  I
>> played violin for some 15 years, so I have a bit more musical education
>> than Andy does, I imagine.  I imagine the case is similar for you.
> 
> Correct. I only played violin for 5 years.

You played violin?  That's cool. :-)

Did you just take lessons in school, or private lessons, or self-study?

Jim

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Jim Henderson wrote:
> mplayer -ao pcm:file=temp.wav file.mp3

Excellent. I'm going to have to do this on some 4 million mp3 files next 
week. Good to know which program can do that. :-)

-- 
   Darren New / San Diego, CA, USA (PST)
     On what day did God create the body thetans?

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On Fri, 08 Feb 2008 17:28:05 -0800, Darren New wrote:

> Jim Henderson wrote:
>> mplayer -ao pcm:file=temp.wav file.mp3
> 
> Excellent. I'm going to have to do this on some 4 million mp3 files next
> week. Good to know which program can do that. :-)

Scripting is a wonderful thing, ain't it? ;-)

(and incidentally, I actually got the parameters right! :-) )

Jim

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Darren New escribió:
> Jim Henderson wrote:
>> mplayer -ao pcm:file=temp.wav file.mp3
> 
> Excellent. I'm going to have to do this on some 4 million mp3 files next 
> week. Good to know which program can do that. :-)
> 

I think LAME itself can do it.

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On Fri, 08 Feb 2008 23:56:23 -0200, Nicolas Alvarez wrote:

> Darren New escribió:
>> Jim Henderson wrote:
>>> mplayer -ao pcm:file=temp.wav file.mp3
>> 
>> Excellent. I'm going to have to do this on some 4 million mp3 files
>> next week. Good to know which program can do that. :-)
>> 
>> 
> I think LAME itself can do it.

Yeah, probably - I thought about that and then thought "well, if you 
convert to WAV first, you know any MP3 tag info will be wiped out and the 
raw format will be rewritten, probably removing any embedded watermarks"

Jim

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