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Re: [Bug-gnupod] "Please sync your iPod with iTunes"

From: H. Langos
Subject: Re: [Bug-gnupod] "Please sync your iPod with iTunes"
Date: Wed, 16 Sep 2009 11:04:30 +0200
User-agent: Mutt/1.5.18 (2008-05-17)

Hi Viktor,

As you have seen on the list archive, the 3rd gen iPod shuffle (the talking 
one) is not yet supported by gnupod.

Apple changed the format of the iTunesSD file for that device and thus we
need to reverse engineer the format before being able to write it.

Efforts have started and will be documented on

You can upload example itunessd and itunesdb file to
to have them analysed as far as we know the format. 

You can certainly help by looking at the output and trying to identify 
yet unknown fields in the iTunesSD file. 

Also simply documenting the stuff that the analyser already recognizes on
http://shuffle3db.wikispaces.com/iTunesSD3gen would be a great help.

There are still some unknown fields and some sort order fields that we don't
realy understand. 

When I bought my first iPod I have only used iTunes for about 15 minutes 
before rebooting into linux and looking for a better tool. So my knowledge
of iTunes is rather limited and somebody who knowns iTunes will probably 
have an easier time finding out what those fields mean.

One way to do testing, would be to only change small things in iTunes and 
see what changes in the iTunesSD.

Another way would be to produce a lot of almost-identical mp3 files (some
slightly shorter, some slightly longer, some with a different sample
frequency some with a different volume) add them all to the shuffe and see 
how their chuncks differ in the yet unknown fields.

Whatever you do, make sure that you use short audio files for testing that are
either simple test sounds that are not copyrighted at all, or use files that 
you are allowed to copy and share (like stuff from jamendo.com). This will
make it easier to publish your findings without atracting the RIAA vultures
... aehm lawyers.

I havn't been able to do a lot in the recent weeks as I was pretty busy with
family matters (moving to a new apartment and managing a growing family 
demands a lot of time), but I hope I'll get something done these days.


On Tue, Sep 15, 2009 at 11:48:59PM +0200, Nagy Viktor - Akasha wrote:
> Hi,
> I would like to use gnupod w/ a 3rd gen iPod shuffle, (serial number
> 4H936BKYALB, software: v1.1), I've installed gnupod 0.99.8, and it seemingly
> works fine except for the end result
> whenever I do something on the iPod, and finally run mktunes.pl, iPod
> refuses to play any songs, and instead says something like "Please sync your
> iPod with iTunes"
> after the iPod needs to be connected to an iTunes, leave it to sync, and
> after disconnecting it I can use it fine
> I've attached my DB files after letting iTunes to "correct them" (thus with
> the attached iTunesDB file iPod is working fine, but with the one generated
> from the attached GNUtunesDB it is not)
> after browsing the archives, I've found a probably related thread:
> http://lists.gnu.org/archive/html/bug-gnupod/2009-07/msg00019.html
> if there is anything I can help, please let me know
> thanks for your work,
> despite the above problem, gnupod seems to me the most reliable iPod
> management app around, at least among the ones I've tried (gtkpod, yamipod,
> libipod)
> thank you and have a nice day,
> Viktor

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