======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '177'
                                          'artist'  'Tom Waits'
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                                      'lastfmtags'  "['blues', 'rock', 'alternative', 'experimental', 'singer songwriter']"
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                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  '18'
                                            'date'  '1989'
                                        'comments'  ''
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======================== rawer (from filesystem) ========================

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'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter'
'TDOR' (Original release time)                      '1975'
'TDRC' (Recording time)                             '1989'
'TFLT' (File type)                                  '/3'
'TIT2' (Title/songname/content description)         '[opening intro]'
'TKEY' (Initial key)                                '3A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Tom Waits'
'TPE2' (Band/orchestra/accompaniment)               'Tom Waits'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Asylum Records'
'TRCK' (Track number/Position in set)               '1/18'
'TSO2'                                              'Waits, Tom'
'TSOP' (Performer sort order)                       'Waits, Tom'
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'TXXX:Q-LOCALNESS'                                  '1'
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'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '1'
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'TXXX:q-vocals'                                     '4'
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========================== row from database ==========================
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                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Waits, Tom - Tom Waits/Nighthawks at the dinner/01 - (Opening Intro).mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  177
                                           'genre'  ifs-songwriter
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                                           'mtime'  1639508268
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                                        'rest_str'   00singer songwriter eos Waits, dinner 01 (Opening Intro) ifs songwriter
                                      'tag_artist'  Tom Waits
                                     'tag_release'  Nighthawks at the Diner
                                       'tag_title'  [opening intro]
                                             'bpm'  109.055
                                    'search_title'  'intro':3,4 'opening':1,2
                                   'search_artist'  'tom':1 'waits':2
                                  'search_release'  'at':2 'diner':4 'nighthawks':1 'the':3
                                     'search_rest'  '00singer':1 'dinner':6 'eos':3 'ifs':11 'intro':9,10 'opening':7,8 'songwriter':2 'waits':4,5
                                    'search_combo'  '00singer':11 'at':8C 'diner':10C 'dinner':16 'eos':13 'ifs':21 'intro':3A,4A,19,20 'nighthawks':7C 'opening':1A,2A,17,18 'songwriter':12 'the':9C 'tom':5B 'waits':6B,14,15
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-4', 'q-other-2', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['blues', 'rock', 'alternative', 'experimental', 'singer songwriter']
                                        'tag_date'  1989
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1639508267.6222866  (2021-12-14 19:57:47)
                             'size'  3551004