======================== unified (from filesystem) ========================
                                         'bitrate'  '112.0'
                                        'duration'  '181'
                                          'artist'  'BILLY MURRAY'
                                     'text_people'  ''
                                         'release'  '20s and 30s popular'
                                           'title'  'IF YOU KNEW SUSIE'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['vaudeville', 'all', 'gramophone', 'pop', 'real oldies']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1926'
                                        'comments'  ''
                                           'genre'  'prerock-vaudeville'
                                             'bpm'  '107.951'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     '20s and 30s popular'
'TBPM' (BPM (beats per minute))                     '107.951'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vaudeville'
'TDRC' (Recording time)                             '1926'
'TIT2' (Title/songname/content description)         'IF YOU KNEW SUSIE'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'BILLY MURRAY'
'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:lastfmtags'                                   ['vaudeville', 'all', 'gramophone', 'pop', 'real oldies']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'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'                                     '2'
'TXXX:replaygain_track_gain'                        '+2.43 dB'
'TXXX:replaygain_track_peak'                        '0.595981'

========================== row from database ==========================
                                              'id'  1138698
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Billy Murray - If You Knew Susie 1926.mp3
                                         'working'  None
                                         'bitrate'  112
                                    'duration_sec'  181
                                           'genre'  prerock-vaudeville
                                        'filesize'  2555918
                                           'mtime'  1620666348
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s 1930s Billy Murray If You Knew Susie 1926 prerock vaudeville
                                      'tag_artist'  BILLY MURRAY
                                     'tag_release'  20s and 30s popular
                                       'tag_title'  IF YOU KNEW SUSIE
                                             'bpm'  107.951
                                    'search_title'  'if':1 'knew':3 'susie':4 'you':2
                                   'search_artist'  'billy':1 'murray':2
                                  'search_release'  '20s':1 '30s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1926':14 '1930s':7 'billy':8 'country':4 'exotica':2 'if':10 'jazz':1 'knew':12 'murray':9 'oldies':3 'prerock':15 'susie':13 'vaudeville':16 'you':11
                                    'search_combo'  '00oldiepop':15 '1920s':16 '1926':24 '1930s':17 '20s':7C '30s':9C 'and':8C 'billy':5B,18 'country':14 'exotica':12 'if':1A,20 'jazz':11 'knew':3A,22 'murray':6B,19 'oldies':13 'popular':10C 'prerock':25 'susie':4A,23 'vaudeville':26 'you':2A,21
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['vaudeville', 'all', 'gramophone', 'pop', 'real oldies']
                                        'tag_date'  1926
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620666347.5821574  (2021-05-10 19:05:47)
                             'size'  2555918