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I tried to add a audio cd to my music pool.

When I enable the "Audio CD Support" extension the following output where posted via debug-mode. Now when I take a look to the cd, I realised that banshee was not able to fetch the metadata.

[1 Debug 19:05:59.889] Mapping audio CD (/devices/pci0000:00/0000:00:0a.0/host4/target4:0:0/4:0:0:0/block/sr0)
[1 Debug 19:05:59.890] Extension service started (AudioCdService, 0,054336)
[6 Info  19:05:59.892] Querying MusicBrainz for Disc Release (uuz7WMxmyUfmRfJA4V7uLJ1zBJ8-)
[6 Warn  19:06:00.842] Caught an exception - System.NullReferenceException: Object reference not set to an instance of an object (in `Banshee.AudioCd')
  at Banshee.AudioCd.AudioCdDiscModel.LoadDiscMetadata (System.Object state) [0x00000] in <filename unknown>:0 
[6 Info  19:06:00.842] Query finished (success: False, 0,94958 seconds)

Banshee reports:

(-) Could not fetch track information

Due to the fact that abcde was able to fetch the metadata and the audio cd is "Adele 21" (so well known) i thought that there has to be a fault on my or banshee's side.

I found no extension which seems to be important for that. Any ideas?

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Seems like a bug in Banshee MusicBrainz support. Did you check the bug tracker? – Adam Byrtek May 19 '11 at 18:27
up vote 13 down vote accepted

In Banshee 2.2, both of these issues have been fixed. Ubuntu 11.10 comes with this version of Banshee installed by default.

There are a couple reasons that this could happen:

  1. MusicBrainz recently changed the way that third party applications can request metadata, and this change caused problems with Banshee.

  2. Until recently, if a MusicBrainz DiscID matches multiple albums, Banshee failed to retrieve the metadata. The recent changes to MusicBrainz make this problem more common.

Given the NullReferenceException warning in your log, which looks pretty similar to a log posted in the MusicBrainz forums, it seems likely that you are running into issue #2.

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In Banshee, this has been fixed now, but only after version 2.1.0. If you really care to look into the details, the change was committed on 2011-05-28 but the 2.1.0 branch was created on 2011-05-12.

If you are really itching to get this working again, here are the steps you have to follow: (Warning, this is the daily repo so you will get lots of update notifications and there is a higher risk of bug introduction.)

sudo add-apt-repository ppa:banshee-team/banshee-daily
sudo apt-get update
sudo apt-get upgrade
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