======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '132'
                                          'artist'  'Tom Petty And The Heartbreakers'
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                                         'release'  'Anthology - Through The Years Disk 1'
                                           'title'  'Hometown Blues'
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                                      'lastfmtags'  "['80s', 'rock', 'singer songwriter', 'folk', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
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                                      'tracktotal'  '17'
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic'
                                             'bpm'  '132.444'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '132.444'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-classic'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'Hometown Blues'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'Tom Petty And The Heartbreakers'
'TRCK' (Track number/Position in set)               '3/17'
'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:lastfmtags'                                   ['80s', 'rock', 'singer songwriter', 'folk', 'classic rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.61 dB'
'TXXX:replaygain_track_peak'                        '0.415910'

========================== row from database ==========================
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                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/Tom Petty And The Heartbreakers/Anthology - Through The Years Disk 1/Tom Petty and the Heartbreakers - Hometown Blues - 03.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  132
                                           'genre'  rock-cppex-classic
                                        'filesize'  2126533
                                           'mtime'  1636038995
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy and the 03 rock cppex classic
                                      'tag_artist'  Tom Petty And The Heartbreakers
                                     'tag_release'  Anthology - Through The Years Disk 1
                                       'tag_title'  Hometown Blues
                                             'bpm'  132.444
                                    'search_title'  'blues':2 'hometown':1
                                   'search_artist'  'and':3 'heartbreakers':5 'petty':2 'the':4 'tom':1
                                  'search_release'  '1':6 'anthology':1 'disk':5 'the':3 'through':2 'years':4
                                     'search_rest'  'and':2 'classic':6 'classicprogpsy':1 'cppex':5 'rock':4 'the':3
                                    'search_combo'  '1':13C 'and':5B,15 'anthology':8C 'blues':2A 'classic':19 'classicprogpsy':14 'cppex':18 'disk':12C 'heartbreakers':7B 'hometown':1A 'petty':4B 'rock':17 'the':6B,10C,16 'through':9C 'tom':3B 'years':11C
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  12B
                                           '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-3', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['80s', 'rock', 'singer songwriter', 'folk', 'classic rock']
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636038995.41482  (2021-11-04 16:16:35)
                             'size'  2126533