======================== unified (from filesystem) ========================
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                                        'duration'  '218'
                                          'artist'  'The Runaways'
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                                           'title'  'Saturday Night Special'
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                                      'lastfmtags'  "['female vocalists', 'punk', 'glam rock', 'rock', 'hard rock', '70s']"
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                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
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                                     'tracknumber'  '1'
                                      'tracktotal'  '9'
                                            'date'  '1979'
                                        'comments'  ''
                                           'genre'  'rock-gr-hard;rock-pop-glam'
                                             'bpm'  '122.437'
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                                        'acoustid'  ''
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '122.437'
'TCON' (Content type, a.k.a. Genre)                 ['rock-gr-hard', 'rock-pop-glam']
'TDOR' (Original release time)                      '1979'
'TDRC' (Recording time)                             '1979'
'TENC' (Encoded by)                                 'FairStars Audio Converter'
'TIT2' (Title/songname/content description)         'Saturday Night Special'
'TKEY' (Initial key)                                '6B'
'TMED' (Media type)                                 '12" Vinyl'
'TPE1' (Lead performer(s)/Soloist(s))               'The Runaways'
'TPE2' (Band/orchestra/accompaniment)               'The Runaways'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Cherry Red Records'
'TRCK' (Track number/Position in set)               '1/9'
'TSO2'                                              'Runaways, The'
'TSOP' (Performer sort order)                       'Runaways, The'
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'TXXX:MusicBrainz Album Release Country'            'GB'
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'TXXX:Q-LOCALNESS'                                  '1'
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'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['female vocalists', 'punk', 'glam rock', 'rock', 'hard rock', '70s']
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'TXXX:q-drums'                                      '4'
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'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.09 dB'
'TXXX:replaygain_track_peak'                        '0.832732'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'6be6091e-3f83-4aa0-aba0-faa68178fe81')

========================== row from database ==========================
                                              'id'  1310850
                                            'path'  /data/Music/Bulk/00poprockelectronic/The Runaways/1978 - And Now ... The Runaways/01 - Saturday Nite Special.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  218
                                           'genre'  rock-gr-hard;rock-pop-glam
                                        'filesize'  8749943
                                           'mtime'  1622658900
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 1978 01 Nite rock gr hard;rock pop glam
                                      'tag_artist'  The Runaways
                                     'tag_release'  And Now... The Runaways
                                       'tag_title'  Saturday Night Special
                                             'bpm'  122.437
                                    'search_title'  'night':2 'saturday':1 'special':3
                                   'search_artist'  'runaways':2 'the':1
                                  'search_release'  'and':1 'now':2,3 'runaways':5 'the':4
                                     'search_rest'  '00poprockelectronic':1 '1978':2 'glam':11 'gr':5 'hard':6,8 'nite':3 'pop':10 'rock':4,7,9
                                    'search_combo'  '00poprockelectronic':11 '1978':12 'and':6C 'glam':21 'gr':15 'hard':16,18 'night':2A 'nite':13 'now':7C,8C 'pop':20 'rock':14,17,19 'runaways':5B,10C 'saturday':1A 'special':3A 'the':4B,9C
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-3', 'q-other-2', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['female vocalists', 'punk', 'glam rock', 'rock', 'hard rock', '70s']
                                        'tag_date'  1979
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1622658899.6619217  (2021-06-02 20:34:59)
                             'size'  8749943