======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '136'
                                          'artist'  'The Everly Brothers'
                                     'text_people'  ''
                                         'release'  '23 Greatest Hits'
                                           'title'  'This Little Girl of Mine'
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                                      'lastfmtags'  "['oldies', '60s', 'rock n roll', 'pop', 'rock and roll', '50s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '19'
                                      'tracktotal'  '23'
                                            'date'  '2000'
                                        'comments'  ''
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                                             'bpm'  '89'
                                             'key'  '9B'
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======================== rawer (from filesystem) ========================

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'TBPM' (BPM (beats per minute))                     '89'
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'TDOR' (Original release time)                      '2000'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'This Little Girl of Mine'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Everly Brothers'
'TPE2' (Band/orchestra/accompaniment)               'The Everly Brothers'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '19/23'
'TSO2'                                              'Everly Brothers, The'
'TSOP' (Performer sort order)                       'Everly Brothers, The'
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'TXXX:Artists'                                      'The Everly Brothers'
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'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album/compilation'
'TXXX:MusicBrainz Artist Id'                        '091ec508-877f-4e3c-92a3-10903bbbc7ad'
'TXXX:MusicBrainz Release Group Id'                 'd8fa91c2-f6ec-3161-a5d4-662b9913de9a'
'TXXX:MusicBrainz Release Track Id'                 '2e6974df-98ba-3bd3-bad3-c0e9dbe9d61e'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   ['oldies', '60s', 'rock n roll', 'pop', 'rock and roll', '50s']
'TXXX:originalyear'                                 '2000'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-0.82 dB'
'TXXX:replaygain_track_peak'                        '0.584784'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'2ceda0d5-781e-4cdf-9931-bc32bd30d33f')

========================== row from database ==========================
                                              'id'  1316615
                                            'path'  /data/Music/Bulk/00poprockelectronic/The Everly Brothers/23 Greatest Hits/The Everly Brothers - This Little Girl of Mine.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  136
                                           'genre'  rock-pop-early-rocknroll
                                        'filesize'  2281929
                                           'mtime'  1622659500
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic rock pop early rocknroll
                                      'tag_artist'  The Everly Brothers
                                     'tag_release'  23 Greatest Hits
                                       'tag_title'  This Little Girl of Mine
                                             'bpm'  89.0
                                    'search_title'  'girl':3 'little':2 'mine':5 'of':4 'this':1
                                   'search_artist'  'brothers':3 'everly':2 'the':1
                                  'search_release'  '23':1 'greatest':2 'hits':3
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                                    'search_combo'  '00poprockelectronic':12 '23':9C 'brothers':8B 'early':15 'everly':7B 'girl':3A 'greatest':10C 'hits':11C 'little':2A 'mine':5A 'of':4A 'pop':14 'rock':13 'rocknroll':16 'the':6B 'this':1A
                                    'tag_tracknum'  19
                                      'num_images'  1
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-2', 'q-syn-2', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['oldies', '60s', 'rock n roll', 'pop', 'rock and roll', '50s']
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1622659500.0657861  (2021-06-02 20:45:00)
                             'size'  2281929