======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '192'
                                          'artist'  'Benny Goodman'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Bluebirds In The Moonlight (vocal - Mildred Bailey)'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['big band', 'jazz', 'clarinet', 'oldies', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1939'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '87.219'
                                             'key'  '11A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '87.219'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1939'
'TIT2' (Title/songname/content description)         'Bluebirds In The Moonlight (vocal - Mildred Bailey)'
'TKEY' (Initial key)                                '11A'
'TPE1' (Lead performer(s)/Soloist(s))               'Benny Goodman'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['big band', 'jazz', 'clarinet', 'oldies', 'swing']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+3.17 dB'
'TXXX:replaygain_track_peak'                        '0.549851'

========================== row from database ==========================
                                              'id'  1427604
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1939/Benny Goodman - Bluebirds In The Moonlight (vocal - Mildred Bailey) 24-10-1939.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  192
                                           'genre'  prerock-swing
                                        'filesize'  3854130
                                           'mtime'  1620561380
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1939 24 10 1939 prerock swing
                                      'tag_artist'  Benny Goodman
                                     'tag_release'  None
                                       'tag_title'  Bluebirds In The Moonlight (vocal - Mildred Bailey)
                                             'bpm'  87.219
                                    'search_title'  'bailey':8,9 'bluebirds':1 'in':2 'mildred':7 'moonlight':4 'the':3 'vocal':5,6
                                   'search_artist'  'benny':1 'goodman':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1939':6 '24':7 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':8 'swing':9
                                    'search_combo'  '00oldiepop':16 '1939':17 '24':18 'bailey':8A,9A 'benny':10B 'bluebirds':1A 'country':15 'exotica':13 'goodman':11B 'in':2A 'jazz':12 'mildred':7A 'moonlight':4A 'oldies':14 'prerock':19 'swing':20 'the':3A 'vocal':5A,6A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  11A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['big band', 'jazz', 'clarinet', 'oldies', 'swing']
                                        'tag_date'  1939
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561379.542762  (2021-05-09 13:56:19)
                             'size'  3854130