Re: [linux-minidisc] linux-minidisc Digest, Vol 43, Issue 5

[John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>]

Hello!

On 01/06/2014 01:02 AM, Jurgen. wrote:
> Would like to see that video demonstration of NetMD download. Do you
> have a link?

Thomas made the video, so he's got the rights for it. If he agrees,
I will upload it to Youtube and provide the link here.

> Do not have a normal MD-74 lying around but only Hi-MD's. In some weeks
> I will have some disks.
> Will sure test in GUI if it is released. If the cli works in Win7
> command prompt I can test as well.

I am currently merging many patches, so there will be several new
versions and the GUI is gaining more and more features now.

> What is confusing me is your text:
> 
> "Downloading to HiMD in ATRAC3+ or PCM is unfortunately a bit
> more complicated as it involves a key encryption mechanism
> since all non-MP3 tracks on HiMD MiniDiscs are encrypted. I don't
> know when this will be implemented, but it will come at some
> time."

It's not confusing when you understand that HiMD Walkman support
three on-disk formats: ATRAC3+, PCM (WAV) and MP3, the latter
only available on the 2nd and 3rd generation HiMD models.

Now, the particularity about MP3s on HiMD is that these are virtually
unencrypted on the MiniDisc. There is some kind of encryption, but
that uses a constant encryption key and the DRM is completely
disabled for MP3s. Hence, it's rather trivial to copy an MP3
track to a HiMD device if the device supports MP3 playback.

However, when you want to use ATRAC3+ or PCM, you have to use
the proper encryption with real encryption keys and DRM enabled
which involves lots of complicated maths and we haven't dug into
that yet.

So, except ATRAC3+/PCM transfers *to* HiMD devices, we will have
full MD transfer support in QHiMDTransfer soon.

Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz@debian.org
`. `'   Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
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