======================== unified (from filesystem) ========================
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                                        'duration'  '370'
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                                           'title'  'Evenings and Weekends ... Free: Empire State Building'
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                                     'discogstags'  "['radioplay', 'electronic', 'non-music', 'experimental']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  '10'
                                            'date'  '2005'
                                        'comments'  ''
                                           'genre'  'electronic-unsorted'
                                             'bpm'  '144.3'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

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'COMM:iTunPGAP:eng'                                 '0'
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'COMM:iTunes_CDDB_TrackNumber:eng'                  '3'
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'TBPM' (BPM (beats per minute))                     '144.3'
'TCON' (Content type, a.k.a. Genre)                 'electronic-unsorted'
'TDRC' (Recording time)                             '2005'
'TENC' (Encoded by)                                 'iTunes v7.3'
'TIT2' (Title/songname/content description)         'Evenings and Weekends ... Free: Empire State Building'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               '31 Down'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '3/10'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['radioplay', 'electronic', 'non-music', 'experimental']
'TXXX:q-bass'                                       '1'
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'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
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'TXXX:q-mixbeat'                                    '1'
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'TXXX:q-piano'                                      '1'
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========================== row from database ==========================
                                              'id'  1362247
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Scanner - Crossed Circuits/03 Evenings and Weekends ... Free_ Empire State Building.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  370
                                           'genre'  electronic-unsorted
                                        'filesize'  8887162
                                           'mtime'  1620541916
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Scanner 03 Free_ electronic unsorted
                                      'tag_artist'  31 Down
                                     'tag_release'  Crossed Circuits
                                       'tag_title'  Evenings and Weekends ... Free: Empire State Building
                                             'bpm'  144.3
                                    'search_title'  'and':2 'building':8 'empire':6 'evenings':1 'free':4,5 'state':7 'weekends':3
                                   'search_artist'  '31':1 'down':2
                                  'search_release'  'circuits':2 'crossed':1
                                     'search_rest'  'electronic':3 'free':2 'scanner':1 'unsorted':4
                                    'search_combo'  '31':9B 'and':2A 'building':8A 'circuits':12C 'crossed':11C 'down':10B 'electronic':15 'empire':6A 'evenings':1A 'free':4A,5A,14 'scanner':13 'state':7A 'unsorted':16 'weekends':3A
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-1', 'q-other-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  2005
                                     'discogstags'  ['radioplay', 'electronic', 'non-music', 'experimental']

============================== file details ==============================
                                           'mtime'  1620541916.3945615  (2021-05-09 08:31:56)
                             'size'  8887162