======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '169'
                                          'artist'  'Bert Ambrose'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'One Morning In May (vocal - Sa'
                                           '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-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  '["20\'s", \'british dance band\', \'retro\', \'swing\']'
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1934'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '139.2'
                                             'key'  '4B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '139.2'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1934'
'TIT2' (Title/songname/content description)         'One Morning In May (vocal - Sa'
'TKEY' (Initial key)                                '4B'
'TPE1' (Lead performer(s)/Soloist(s))               'Bert Ambrose'
'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:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ["20's", 'british dance band', 'retro', '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'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.73 dB'
'TXXX:replaygain_track_peak'                        '0.513139'

========================== row from database ==========================
                                              'id'  1468037
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1934/Bert Ambrose - One Morning In May (vocal - Sam Browne) 5-4-1934.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  169
                                           'genre'  prerock-swing
                                        'filesize'  3550123
                                           'mtime'  1620560377
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1934 Sam Browne) 5 4 1934 prerock swing
                                      'tag_artist'  Bert Ambrose
                                     'tag_release'  None
                                       'tag_title'  One Morning In May (vocal - Sa
                                             'bpm'  139.2
                                    'search_title'  'in':3 'may':4 'morning':2 'one':1 'sa':7 'vocal':5,6
                                   'search_artist'  'ambrose':2 'bert':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1934':6 '4':11 '5':10 'browne':8,9 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':12 'sam':7 'swing':13
                                    'search_combo'  '00oldiepop':14 '1934':15 '4':20 '5':19 'ambrose':9B 'bert':8B 'browne':17,18 'country':13 'exotica':11 'in':3A 'jazz':10 'may':4A 'morning':2A 'oldies':12 'one':1A 'prerock':21 'sa':7A 'sam':16 'swing':22 'vocal':5A,6A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  4B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', '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-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ["20's", 'british dance band', 'retro', 'swing']
                                        'tag_date'  1934
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620560377.105453  (2021-05-09 13:39:37)
                             'size'  3550123