======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '467'
                                          'artist'  'Sigur Rós'
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                                      'lastfmtags'  "['indie', 'alternative', 'icelandic', 'post rock', 'ambient']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  '4'
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'electronic-ambient'
                                             'bpm'  '129'
                                             'key'  '11B'
                                        'acoustid'  '52196a02-66e0-4497-a175-f334e98625ac'
rest: ''

======================== rawer (from filesystem) ========================

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'TBPM' (BPM (beats per minute))                     '129'
'TCON' (Content type, a.k.a. Genre)                 'electronic-ambient'
'TDOR' (Original release time)                      '1999'
'TDRC' (Recording time)                             '2000-08-14'
'TIT2' (Title/songname/content description)         'Flugufrelsarinn'
'TKEY' (Initial key)                                '11B'
'TMED' (Media type)                                 '12" Vinyl'
'TPE1' (Lead performer(s)/Soloist(s))               'Sigur Rós'
'TPE2' (Band/orchestra/accompaniment)               'Sigur Rós'
'TPOS' (Part of a set)                              '1/2'
'TPUB' (Publisher)                                  'FatCat Records'
'TRCK' (Track number/Position in set)               '3/4'
'TSO2'                                              'Sigur Rós'
'TSOP' (Performer sort order)                       'Sigur Rós'
'TSRC' (ISRC (international standard recording code))  'GBDCA9900069/ISC109900404'
'TXXX:Acoustid Id'                                  '52196a02-66e0-4497-a175-f334e98625ac'
'TXXX:Artists'                                      'Sigur Rós'
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'TXXX:MusicBrainz Album Release Country'            'GB'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
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'TXXX:MusicBrainz Release Group Id'                 '62b427b8-1c52-34e7-b250-da2aa3e44860'
'TXXX:MusicBrainz Release Track Id'                 '998b1838-6963-3118-89d7-2d548c4fa131'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   ['indie', 'alternative', 'icelandic', 'post rock', 'ambient']
'TXXX:originalyear'                                 '1999'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-1.56 dB'
'TXXX:replaygain_track_peak'                        '0.380031'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'53837546-8792-41e2-a0fa-2ee34dfcaec5')

========================== row from database ==========================
                                              'id'  1316825
                                            'path'  /data/Music/Bulk/00poprockelectronic/Sigur Ros/Agaetis Byrjun/04 - Flugufrelsarinn.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  467
                                           'genre'  electronic-ambient
                                        'filesize'  11269072
                                           'mtime'  1636911189
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Ros Agaetis Byrjun 04 electronic ambient
                                      'tag_artist'  Sigur Rós
                                     'tag_release'  Ágætis byrjun
                                       'tag_title'  Flugufrelsarinn
                                             'bpm'  129.0
                                    'search_title'  'flugufrelsarinn':1
                                   'search_artist'  'ros':2,3 'sigur':1
                                  'search_release'  'agaetis':2 'agætis':1 'byrjun':3
                                     'search_rest'  '00poprockelectronic':1 'agaetis':3 'ambient':6 'byrjun':4 'electronic':5 'ros':2
                                    'search_combo'  '00poprockelectronic':8 'agaetis':6C,10 'agætis':5C 'ambient':13 'byrjun':7C,11 'electronic':12 'flugufrelsarinn':1A 'ros':3B,4B,9 'sigur':2B
                                    'tag_tracknum'  3
                                      'num_images'  1
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-2', 'q-syn-3', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['indie', 'alternative', 'icelandic', 'post rock', 'ambient']
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636911189.2136111  (2021-11-14 18:33:09)
                             'size'  11269072