======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '199'
                                          'artist'  'New Mayfair Dance Orchestra'
                                     'text_people'  ''
                                         'release'  'HMV BD-5721'
                                           'title'  "Russian Serenade (dir Phil Green v Ronnie O' Dell)"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1941'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '143.925'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'HMV BD-5721'
'TBPM' (BPM (beats per minute))                     '143.925'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1941'
'TIT2' (Title/songname/content description)         "Russian Serenade (dir Phil Green v Ronnie O' Dell)"
'TKEY' (Initial key)                                '7B'
'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'                                       '1'
'TXXX:q-busy'                                       '3'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.95 dB'
'TXXX:replaygain_track_peak'                        '0.387829'

========================== row from database ==========================
                                              'id'  1505017
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1941/New Mayfair Dance Orchestra - Russian Serenade (dir Phil Green v Ronnie O_ Dell) 26-11-1941.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  199
                                           'genre'  prerock-band
                                        'filesize'  3987250
                                           'mtime'  1620560935
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1941 O_ 26 11 1941 prerock band
                                      'tag_artist'  New Mayfair Dance Orchestra
                                     'tag_release'  HMV BD-5721
                                       'tag_title'  Russian Serenade (dir Phil Green v Ronnie O' Dell)
                                             'bpm'  143.925
                                    'search_title'  'dell':11,12 'dir':3,4 'green':6 'o':9,10 'phil':5 'ronnie':8 'russian':1 'serenade':2 'v':7
                                   'search_artist'  'dance':3 'mayfair':2 'new':1 'orchestra':4
                                  'search_release'  '5721':3 'bd':2 'bd5721':4 'hmv':1
                                     'search_rest'  '00oldiepop':5 '1941':6 '26':8 'band':10 'country':4 'exotica':2 'jazz':1 'o':7 'oldies':3 'prerock':9
                                    'search_combo'  '00oldiepop':25 '1941':26 '26':28 '5721':19C 'band':30 'bd':18C 'bd5721':20C 'country':24 'dance':15B 'dell':11A,12A 'dir':3A,4A 'exotica':22 'green':6A 'hmv':17C 'jazz':21 'mayfair':14B 'new':13B 'o':9A,10A,27 'oldies':23 'orchestra':16B 'phil':5A 'prerock':29 'ronnie':8A 'russian':1A 'serenade':2A 'v':7A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7B
                                           '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-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1941
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620560934.94244  (2021-05-09 13:48:54)
                             'size'  3987250