======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '198'
                                          'artist'  'Billie Holiday'
                                     'text_people'  ''
                                         'release'  'Ken Burns Jazz: Definitive Billie Holiday'
                                           'title'  'Lover Man'
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                                      'lastfmtags'  "['vocal jazz', 'blues', 'jazz', 'female vocalists', 'jazz vocal']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '13'
                                      'tracktotal'  '19'
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'prerock-jb-blues'
                                             'bpm'  '136'
                                             'key'  '8B'
                                        'acoustid'  'e7879c00-f8e4-4ad1-b36b-81aa65ed42db'
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Ken Burns Jazz: Definitive Billie Holiday'
'TBPM' (BPM (beats per minute))                     '136'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-blues'
'TDOR' (Original release time)                      '2000'
'TDRC' (Recording time)                             '2000-11-07'
'TIT2' (Title/songname/content description)         'Lover Man'
'TKEY' (Initial key)                                '8B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Billie Holiday'
'TPE2' (Band/orchestra/accompaniment)               'Billie Holiday'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Verve'
'TRCK' (Track number/Position in set)               '13/19'
'TSO2'                                              'Holiday, Billie'
'TSOP' (Performer sort order)                       'Holiday, Billie'
'TSRC' (ISRC (international standard recording code))  'USMC14450716'
'TXXX:ASIN'                                         'B000050I3R'
'TXXX:Acoustid Id'                                  'e7879c00-f8e4-4ad1-b36b-81aa65ed42db'
'TXXX:Artists'                                      'Billie Holiday'
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'TXXX:CATALOGNUMBER'                                '314 549 081-2'
'TXXX:MusicBrainz Album Artist Id'                  'd59c4cda-11d9-48db-8bfe-b557ee602aed'
'TXXX:MusicBrainz Album Id'                         '0ece900b-e872-41de-bf4b-f511c585e96d'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album/compilation'
'TXXX:MusicBrainz Artist Id'                        'd59c4cda-11d9-48db-8bfe-b557ee602aed'
'TXXX:MusicBrainz Release Group Id'                 'c1ed88dc-7400-3b98-8d32-33ec3b8b66e1'
'TXXX:MusicBrainz Release Track Id'                 '2d8fd632-5767-39ab-b9f7-41a1903832bc'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   ['vocal jazz', 'blues', 'jazz', 'female vocalists', 'jazz vocal']
'TXXX:originalyear'                                 '2000'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+4.10 dB'
'TXXX:replaygain_track_peak'                        '0.443160'
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========================== row from database ==========================
                                              'id'  1521991
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Billie Holiday/Ken Burns Jazz  The Definitive Billie Holiday/MBZ;#Billie Holiday;#Ken Burns Jazz The Definitive Billie Holiday;#12;#Trav_lin_ Light.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  198
                                           'genre'  prerock-jb-blues
                                        'filesize'  7947898
                                           'mtime'  1620402234
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country The MBZ;#Billie Holiday;#Ken The Holiday;#12;#Trav_lin_ Light prerock jb blues
                                      'tag_artist'  Billie Holiday
                                     'tag_release'  Ken Burns Jazz: Definitive Billie Holiday
                                       'tag_title'  Lover Man
                                             'bpm'  136.0
                                    'search_title'  'lover':1 'man':2
                                   'search_artist'  'billie':1 'holiday':2
                                  'search_release'  'billie':6 'burns':2 'definitive':5 'holiday':7 'jazz':3,4 'ken':1
                                     'search_rest'  '12':15,19 'billie':7,9 'blues':25 'country':4 'exotica':2 'holiday':10,12,14,18 'jazz':1 'jb':24 'ken':11,13 'light':22 'lin':17,21 'mbz':6,8 'oldies':3 'prerock':23 'the':5 'trav':16,20
                                    'search_combo'  '12':26,30 'billie':3B,10C,18,20 'blues':36 'burns':6C 'country':15 'definitive':9C 'exotica':13 'holiday':4B,11C,21,23,25,29 'jazz':7C,8C,12 'jb':35 'ken':5C,22,24 'light':33 'lin':28,32 'lover':1A 'man':2A 'mbz':17,19 'oldies':14 'prerock':34 'the':16 'trav':27,31
                                    'tag_tracknum'  13
                                      'num_images'  0
                                             'key'  8B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-4', 'q-other-3', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['vocal jazz', 'blues', 'jazz', 'female vocalists', 'jazz vocal']
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620402233.5182636  (2021-05-07 17:43:53)
                             'size'  7947898