======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '162'
                                          'artist'  'Paul Robeson'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Song Of The Volga Boatmen'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['american', 'blues', 'spiritual', 'folk', 'gospel']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1938'
                                        'comments'  ''
                                           'genre'  'prerock-spiritual or gospel'
                                             'bpm'  '115.854'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '115.854'
'TCON' (Content type, a.k.a. Genre)                 'prerock-spiritual or gospel'
'TDRC' (Recording time)                             '1938'
'TIT2' (Title/songname/content description)         'Song Of The Volga Boatmen'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Paul Robeson'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['american', 'blues', 'spiritual', 'folk', 'gospel']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.40 dB'
'TXXX:replaygain_track_peak'                        '0.551044'

========================== row from database ==========================
                                              'id'  1454183
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1938/Paul Robeson - Song Of The Volga Boatmen 28-3-1938 .mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  162
                                           'genre'  prerock-spiritual or gospel
                                        'filesize'  3252018
                                           'mtime'  1642095560
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1938 28 3 1938 prerock spiritual or gospel
                                      'tag_artist'  Paul Robeson
                                     'tag_release'  None
                                       'tag_title'  Song Of The Volga Boatmen
                                             'bpm'  115.854
                                    'search_title'  'boatmen':5 'of':2 'song':1 'the':3 'volga':4
                                   'search_artist'  'paul':1 'robeson':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1938':6 '28':7 '3':8 'country':4 'exotica':2 'gospel':12 'jazz':1 'oldies':3 'or':11 'prerock':9 'spiritual':10
                                    'search_combo'  '00oldiepop':12 '1938':13 '28':14 '3':15 'boatmen':5A 'country':11 'exotica':9 'gospel':19 'jazz':8 'of':2A 'oldies':10 'or':18 'paul':6B 'prerock':16 'robeson':7B 'song':1A 'spiritual':17 'the':3A 'volga':4A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HAP-2', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', 'q-chart-1', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']
                                      'lastfmtags'  ['american', 'blues', 'spiritual', 'folk', 'gospel']
                                        'tag_date'  1938
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1642095560.4627604  (2022-01-13 18:39:20)
                             'size'  3252018