Re: protected oma to mp3

#3 07-22-2009, 11:10 PM

Problems with DRM protected OMA files

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I almost got there... and gave up. Luckily I had saved almost everything in WAV since the last export to DRM-free .oma files.

What I think you have to do, among other things, is to duplicate the registry (as it pertains to Sonic Stage) and restore the DRM keys if they are there.

The second key step I am sure you have to do is to set yourself back in time to the exact moment (give or take a few hours) when the keys were last valid. There seemed to be some sort of time element embedded into the keys. If you haven't touched any of the file in the sonic stage folder, this may not be a huge problem.

The third key step which was also beyond me, is that you have to duplicate your user ID somehow on Windows (eek!). There are utilities out there which map user SID's (you know 500-1-blah blah) to human readable ids. Then you have to be able to log on to that user under Windows.

I am pretty sure they used all three elements (time, user id and keys) in the scheme.

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If one uses a Sony RH1/M200 to record live via mic in PCM...they can then convert to WAV using Sonic Stage with none of the worries. The same could be said of anything recorded on these units in real time. In other words, once you learn the tricks, it is not so bad. Even if you never convert recorded (uploaded) files, you can use the file conversion tool, say once a month or so, and you will have DRM free OMA files for everything.

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All I have are the original OMA files, and they won't even play on my new PC because they are not recognized as belonging to me. If you read the web, you will see that if you can't play them, then you are stuck. There are many misconceptions about how to get around this, and many folks have spent many hours with no results. Yes, I know if I *could* play them then I could use an analog connection to capture the sound on another device. You would lose some quality of course, but at least you would have the files. But making an analog copy is not even possible if you can't play the material.

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If you can play back your .oma files with Sonic Stage you can convert them to .wav from Sonic Stage itself, with Save in .WAV Format under Tools. For 2.x versions of SonicStage, Sony has .Wav Converter (free) to do the same thing.