======================== unified (from filesystem) ========================
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                                        'duration'  '273'
                                          'artist'  'The Jon Spencer Blues Explosion'
                                     'text_people'  ''
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                                      'lastfmtags'  "['blues rock', 'alternative rock', 'blues', '77davez all tracks', 'rock']"
                                     'discogstags'  "['rock', 'alternative rock', 'blues rock', 'indie rock', 'rock & roll']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '12'
                                      'tracktotal'  '12'
                                            'date'  '2002'
                                        'comments'  ''
                                           'genre'  'rock-pop-early-blues'
                                             'bpm'  '124'
                                             'key'  '6B'
                                        'acoustid'  'eac95269-9fe2-4f8d-802d-325df7aafe79'
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '124'
'TCON' (Content type, a.k.a. Genre)                 'rock-pop-early-blues'
'TDOR' (Original release time)                      '2002'
'TDRC' (Recording time)                             '2002-04-08'
'TIT2' (Title/songname/content description)         'Mean Heart'
'TKEY' (Initial key)                                '6B'
'TLEN' (Length)                                     '273606'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'The Jon Spencer Blues Explosion'
'TPE2' (Band/orchestra/accompaniment)               'The Jon Spencer Blues Explosion'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Mute'
'TRCK' (Track number/Position in set)               '12/12'
'TSO2'                                              'Spencer, Jon, Blues Explosion, The'
'TSOP' (Performer sort order)                       'Spencer, Jon, Blues Explosion, The'
'TSRC' (ISRC (international standard recording code))  'GBAJH0100545'
'TXXX:ASIN'                                         'B00005YVZB'
'TXXX:Acoustid Id'                                  'eac95269-9fe2-4f8d-802d-325df7aafe79'
'TXXX:Artists'                                      'The Jon Spencer Blues Explosion'
'TXXX:BARCODE'                                      '5016025611997'
'TXXX:CATALOGNUMBER'                                'CDSTUMM199'
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'TXXX:MusicBrainz Album Id'                         'bcad86eb-c89d-3f34-844a-70253ef936bf'
'TXXX:MusicBrainz Album Release Country'            'XE'
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'TXXX:MusicBrainz Album Type'                       'album'
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'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['rock', 'alternative rock', 'blues rock', 'indie rock', 'rock & roll']
'TXXX:lastfmtags'                                   ['blues rock', 'alternative rock', 'blues', '77davez all tracks', 'rock']
'TXXX:originalyear'                                 '2002'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.99 dB'
'TXXX:replaygain_track_peak'                        '0.491222'
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========================== row from database ==========================
                                              'id'  1417948
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/The Jon Spencer Blues Explosion - Jon Spencer Blues Explosion/Plastic Fang/Jon Spencer Blues Explosion - Point of View - 12.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  273
                                           'genre'  rock-pop-early-blues
                                        'filesize'  4380928
                                           'mtime'  1620736525
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Point of View 12 rock pop early blues
                                      'tag_artist'  The Jon Spencer Blues Explosion
                                     'tag_release'  Plastic Fang
                                       'tag_title'  Mean Heart
                                             'bpm'  124.0
                                    'search_title'  'heart':2 'mean':1
                                   'search_artist'  'blues':4 'explosion':5 'jon':2 'spencer':3 'the':1
                                  'search_release'  'fang':2 'plastic':1
                                     'search_rest'  'blues':11 'country':4 'early':10 'exotica':2 'jazz':1 'of':6 'oldies':3 'point':5 'pop':9 'rock':8 'view':7
                                    'search_combo'  'blues':6B,20 'country':13 'early':19 'exotica':11 'explosion':7B 'fang':9C 'heart':2A 'jazz':10 'jon':4B 'mean':1A 'of':15 'oldies':12 'plastic':8C 'point':14 'pop':18 'rock':17 'spencer':5B 'the':3B 'view':16
                                    'tag_tracknum'  12
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['blues rock', 'alternative rock', 'blues', '77davez all tracks', 'rock']
                                        'tag_date'  2002
                                     'discogstags'  ['rock', 'alternative rock', 'blues rock', 'indie rock', 'rock & roll']

============================== file details ==============================
                                           'mtime'  1620736525.245347  (2021-05-11 14:35:25)
                             'size'  4380928