======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '181'
                                          'artist'  'Four Aces'
                                     'text_people'  ''
                                         'release'  'Four Aces featuring Al Alberts'
                                           'title'  'To Love Again'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'Q-PLAY-2', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-1', "
 "'q-chart-1', 'q-drums-1', 'q-other-2', 'q-vocals-4', 'q-mixbeat-1', "
 "'Q-PIANO-2']")
                                      'lastfmtags'  "['6 of 10 stars', 'american', 'oldies', 'pop', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '250'
                                      'tracktotal'  ''
                                            'date'  '1956'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '145.476'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Four Aces featuring Al Alberts'
'TBPM' (BPM (beats per minute))                     '145.476'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1956'
'TIT2' (Title/songname/content description)         'To Love Again'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Four Aces'
'TRCK' (Track number/Position in set)               '250'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['6 of 10 stars', 'american', 'oldies', 'pop', 'rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.85 dB'
'TXXX:replaygain_track_peak'                        '0.353583'

========================== row from database ==========================
                                              'id'  1452877
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1956/1956-250 - Four Aces - To Love Again.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  181
                                           'genre'  prerock-vocal
                                        'filesize'  7262080
                                           'mtime'  1621853348
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1956 1956 250 prerock vocal
                                      'tag_artist'  Four Aces
                                     'tag_release'  Four Aces featuring Al Alberts
                                       'tag_title'  To Love Again
                                             'bpm'  145.476
                                    'search_title'  'again':3 'love':2 'to':1
                                   'search_artist'  'aces':2 'four':1
                                  'search_release'  'aces':2 'al':4 'alberts':5 'featuring':3 'four':1
                                     'search_rest'  '00oldiepop':5 '1956':6 '250':7 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':8 'vocal':9
                                    'search_combo'  '00oldiepop':15 '1956':16 '250':17 'aces':5B,7C 'again':3A 'al':9C 'alberts':10C 'country':14 'exotica':12 'featuring':8C 'four':4B,6C 'jazz':11 'love':2A 'oldies':13 'prerock':18 'to':1A 'vocal':19
                                    'tag_tracknum'  250
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['6 of 10 stars', 'american', 'oldies', 'pop', 'rock']
                                        'tag_date'  1956
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621853347.5098562  (2021-05-24 12:49:07)
                             'size'  7262080