/usr/lib/mime/packages/alsaplayer-text is in alsaplayer-text 0.99.80-5.1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | audio/mpeg; alsaplayer -i text '%s'; nametemplate=%s.mp3; priority=6
audio/mpegurl; alsaplayer -i text '%s'; nametemplate=%s.m3u; priority=6
audio/x-scpls; alsaplayer -i text '%s'; nametemplate=%s.pls; priority=6
audio/x-wav; alsaplayer -i text '%s'; nametemplate=%s.wav; priority=6
application/x-ogg; alsaplayer -i text '%s'; nametemplate=%s.ogg; priority=6
application/ogg; alsaplayer -i text '%s'; nametemplate=%s.ogg; priority=6
audio/x-flac; alsaplayer -i text '%s'; nametemplate=%s.flac; priority=6
application/x-flac; alsaplayer -i text '%s'; nametemplate=%s.flac; priority=6
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