======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '177'
                                          'artist'  'Ben Selvin'
                                     'text_people'  ''
                                         'release'  'Vocalion 14261 A'
                                           'title'  'Ka Lu A'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-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']")
                                      'lastfmtags'  "['jazz classics', 'all', 'swing', 'oldies', 'big band swing']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1920'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '86.548'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Vocalion 14261 A'
'TBPM' (BPM (beats per minute))                     '86.548'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1920'
'TIT2' (Title/songname/content description)         'Ka Lu A'
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'Ben Selvin'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ['jazz classics', 'all', 'swing', 'oldies', 'big band swing']
'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'                        '+0.71 dB'
'TXXX:replaygain_track_peak'                        '0.682574'

========================== row from database ==========================
                                              'id'  1427250
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920/Ben Selvin - Kalua -10-1921.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  177
                                           'genre'  prerock-band
                                        'filesize'  3551503
                                           'mtime'  1620559659
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920 Kalua 10 1921 prerock band
                                      'tag_artist'  Ben Selvin
                                     'tag_release'  Vocalion 14261 A
                                       'tag_title'  Ka Lu A
                                             'bpm'  86.548
                                    'search_title'  'a':3 'ka':1 'lu':2
                                   'search_artist'  'ben':1 'selvin':2
                                  'search_release'  '14261':2 'a':3 'vocalion':1
                                     'search_rest'  '00oldiepop':5 '1920':6 '1921':8 'band':10 'country':4 'exotica':2 'jazz':1 'kalua':7 'oldies':3 'prerock':9
                                    'search_combo'  '00oldiepop':13 '14261':7C '1920':14 '1921':16 'a':3A,8C 'band':18 'ben':4B 'country':12 'exotica':10 'jazz':9 'ka':1A 'kalua':15 'lu':2A 'oldies':11 'prerock':17 'selvin':5B 'vocalion':6C
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  11B
                                           '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-1', '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'  ['jazz classics', 'all', 'swing', 'oldies', 'big band swing']
                                        'tag_date'  1920
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620559659.3931758  (2021-05-09 13:27:39)
                             'size'  3551503