======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '202'
                                          'artist'  'New Mayfair Dance Orchestra'
                                     'text_people'  ''
                                         'release'  'HMV BD-5620'
                                           'title'  'Sleepy Lagoon (vocal - Sam Browne)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1940'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '132.878'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'HMV BD-5620'
'TBPM' (BPM (beats per minute))                     '132.878'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1940'
'TIT2' (Title/songname/content description)         'Sleepy Lagoon (vocal - Sam Browne)'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'New Mayfair Dance Orchestra'
'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:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.28 dB'
'TXXX:replaygain_track_peak'                        '0.776152'

========================== row from database ==========================
                                              'id'  1449171
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1940/New Mayfair Dance Orchestra - Sleepy Lagoon (vocal - Sam Browne) 4-9-1940.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  202
                                           'genre'  prerock-band
                                        'filesize'  4046642
                                           'mtime'  1620560839
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1940 4 9 1940 prerock band
                                      'tag_artist'  New Mayfair Dance Orchestra
                                     'tag_release'  HMV BD-5620
                                       'tag_title'  Sleepy Lagoon (vocal - Sam Browne)
                                             'bpm'  132.878
                                    'search_title'  'browne':6,7 'lagoon':2 'sam':5 'sleepy':1 'vocal':3,4
                                   'search_artist'  'dance':3 'mayfair':2 'new':1 'orchestra':4
                                  'search_release'  '5620':3 'bd':2 'bd5620':4 'hmv':1
                                     'search_rest'  '00oldiepop':5 '1940':6 '4':7 '9':8 'band':10 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':9
                                    'search_combo'  '00oldiepop':20 '1940':21 '4':22 '5620':14C '9':23 'band':25 'bd':13C 'bd5620':15C 'browne':6A,7A 'country':19 'dance':10B 'exotica':17 'hmv':12C 'jazz':16 'lagoon':2A 'mayfair':9B 'new':8B 'oldies':18 'orchestra':11B 'prerock':24 'sam':5A 'sleepy':1A 'vocal':3A,4A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1940
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620560838.6594522  (2021-05-09 13:47:18)
                             'size'  4046642