======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '132'
                                          'artist'  'Henry Hall BBC Dance Orchestra'
                                     'text_people'  ''
                                         'release'  'Columbia FB  1818'
                                           'title'  'Three Brass Bells'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-2', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1937'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '92.391'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Columbia FB  1818'
'TBPM' (BPM (beats per minute))                     '92.391'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1937'
'TIT2' (Title/songname/content description)         'Three Brass Bells'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Henry Hall BBC 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'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'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'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.76 dB'
'TXXX:replaygain_track_peak'                        '0.554698'

========================== row from database ==========================
                                              'id'  1451107
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1937/Henry Hall BBC Dance Orchestra - Three Brass Bells 14-10-1937.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  132
                                           'genre'  prerock-band
                                        'filesize'  2641714
                                           'mtime'  1620560557
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1937 14 10 1937 prerock band
                                      'tag_artist'  Henry Hall BBC Dance Orchestra
                                     'tag_release'  Columbia FB  1818
                                       'tag_title'  Three Brass Bells
                                             'bpm'  92.391
                                    'search_title'  'bells':3 'brass':2 'three':1
                                   'search_artist'  'bbc':3 'dance':4 'hall':2 'henry':1 'orchestra':5
                                  'search_release'  '1818':3 'columbia':1 'fb':2
                                     'search_rest'  '00oldiepop':5 '1937':6 'band':8 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':7
                                    'search_combo'  '00oldiepop':16 '1818':11C '1937':17 'band':19 'bbc':6B 'bells':3A 'brass':2A 'columbia':9C 'country':15 'dance':7B 'exotica':13 'fb':10C 'hall':5B 'henry':4B 'jazz':12 'oldies':14 'orchestra':8B 'prerock':18 'three':1A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', '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-2', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1937
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620560557.0145066  (2021-05-09 13:42:37)
                             'size'  2641714