======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '200'
                                          'artist'  'Gracie Fields'
                                     'text_people'  'Damerell / Evans / Tilsley'
                                         'release'  '20s and 30s popular'
                                           'title'  "Photograph of Mother's Wedding Group, The"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-3', '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'  "['jazz', 'female vocalists', 'british', 'oldies', 'easy listening']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1933'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '136.092'
                                             '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))                     '136.092'
'TCOM' (Composer)                                   'Damerell / Evans / Tilsley'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1933'
'TENC' (Encoded by)                                 'Bygones'
'TIT2' (Title/songname/content description)         "Photograph of Mother's Wedding Group, The"
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Gracie Fields'
'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'                                   ['jazz', 'female vocalists', 'british', 'oldies', 'easy listening']
'TXXX:q-bass'                                       '2'
'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-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+3.18 dB'
'TXXX:replaygain_track_peak'                        '0.444443'

========================== row from database ==========================
                                              'id'  1504608
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Gracie Fields - Photograph of Mother_s Wedding 1933.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  200
                                           'genre'  prerock-vocal
                                        'filesize'  3223552
                                           'mtime'  1620666351
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s 1930s Mother_s 1933 prerock vocal
                                      'tag_artist'  Gracie Fields
                                     'tag_release'  20s and 30s popular
                                       'tag_title'  Photograph of Mother's Wedding Group, The
                                             'bpm'  136.092
                                    'search_title'  'group':7,8 'mother':3 'mothers':5 'of':2 'photograph':1 's':4 'the':9 'wedding':6
                                   'search_artist'  'fields':2 'gracie':1
                                  'search_release'  '20s':1 '30s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':7 '1933':10 'country':4 'exotica':2 'jazz':1 'mother':8 'oldies':3 'prerock':11 's':9 'vocal':12
                                    'search_combo'  '00oldiepop':20 '1920s':21 '1930s':22 '1933':25 '20s':12C '30s':14C 'and':13C 'country':19 'exotica':17 'fields':11B 'gracie':10B 'group':7A,8A 'jazz':16 'mother':3A,23 'mothers':5A 'of':2A 'oldies':18 'photograph':1A 'popular':15C 'prerock':26 's':4A,24 'the':9A 'vocal':27 'wedding':6A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', '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-2', 'Q-HAP-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['jazz', 'female vocalists', 'british', 'oldies', 'easy listening']
                                        'tag_date'  1933
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620666351.0692873  (2021-05-10 19:05:51)
                             'size'  3223552