Comment 14 for bug 1500531

There is also a tool named ogginfo which prints some of information. Don't know where to find it in Ubuntu, in archlinux it is part of package vorbis-tools. I used it with elk_03.ogg and compared the output with the output of bird1_00.ogg but couldn't find suspicious differences. But i don't know much about sound... Example:
$ > ogginfo elk_03.ogg
Processing file "elk_03.ogg"...

New logical stream (#1, serial: 4ef07e8d): type vorbis
Vorbis headers parsed for stream 1, information follows...
Version: 0
Vendor: Xiph.Org libVorbis I 20101101 (Schaufenugget)
Channels: 1
Rate: 16000

Nominal bitrate: 64,000000 kb/s
Upper bitrate not set
Lower bitrate not set
User comments section follows...
        COMMENTS=plus 10 sec silence
Vorbis stream 1:
        Total data length: 15392 bytes
        Playback length: 0m:13.148s
        Average bitrate: 9,364800 kb/s
Logical stream 1 ended