======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '161'
                                          'artist'  'Al Bowlly & Ray Noble'
                                     'text_people'  ''
                                         'release'  'HMV B-6519, Matrix OEA-805-2, Victor 24771'
                                           'title'  'Grinzing'
                                           '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-3', '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'  "['jazz', '30s', 'oldies', 'crooner', 'british']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1925'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '118.567'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'HMV B-6519, Matrix OEA-805-2, Victor 24771'
'TBPM' (BPM (beats per minute))                     '118.567'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1925'
'TIT2' (Title/songname/content description)         'Grinzing'
'TKEY' (Initial key)                                '4A'
'TLEN' (Length)                                     '161436'
'TPE1' (Lead performer(s)/Soloist(s))               'Al Bowlly & Ray Noble'
'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', '30s', 'oldies', 'crooner', 'british']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'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'                        '+0.73 dB'
'TXXX:replaygain_track_peak'                        '0.707515'

========================== row from database ==========================
                                              'id'  1141158
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Al Bowlly, Ray Noble - Grinzing 1934.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  161
                                           'genre'  prerock-vocal
                                        'filesize'  2607141
                                           'mtime'  1620666337
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s and 1930s popular Bowlly, 1934 prerock vocal
                                      'tag_artist'  Al Bowlly & Ray Noble
                                     'tag_release'  HMV B-6519, Matrix OEA-805-2, Victor 24771
                                       'tag_title'  Grinzing
                                             'bpm'  118.567
                                    'search_title'  'grinzing':1
                                   'search_artist'  'al':1 'bowlly':2 'noble':4 'ray':3
                                  'search_release'  '2':8 '24771':11 '6519':3 '805':7 'b':2 'b6519':4 'hmv':1 'matrix':5 'oea':6 'oea8052':9 'victor':10
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':8 '1934':12 'and':7 'bowlly':10,11 'country':4 'exotica':2 'jazz':1 'oldies':3 'popular':9 'prerock':13 'vocal':14
                                    'search_combo'  '00oldiepop':21 '1920s':22 '1930s':24 '1934':28 '2':13C '24771':16C '6519':8C '805':12C 'al':2B 'and':23 'b':7C 'b6519':9C 'bowlly':3B,26,27 'country':20 'exotica':18 'grinzing':1A 'hmv':6C 'jazz':17 'matrix':10C 'noble':5B 'oea':11C 'oea8052':14C 'oldies':19 'popular':25 'prerock':29 'ray':4B 'victor':15C 'vocal':30
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  4A
                                           '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-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['jazz', '30s', 'oldies', 'crooner', 'british']
                                        'tag_date'  1925
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620666337.4806886  (2021-05-10 19:05:37)
                             'size'  2607141