======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '116'
                                          'artist'  "Issler's Orchestra"
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Cannon Waltz 1892'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['pkt 0', 'instrumental', 'all', 'grammophon', '1890s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1892'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '84.0'
                                             'key'  '1B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:MusicMatch_Tempo:eng'                         'None'
'GEOB:SfMarkers'                                    GEOB(encoding=<Encoding.LATIN1: 0>, mime='', filename='', desc='SfMarkers', data=b'\x0c\x00\x00\x00d\x00\x00\x00\x00\x00\x00\x00')
'TBPM' (BPM (beats per minute))                     '84.0'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1892'
'TIT2' (Title/songname/content description)         'Cannon Waltz 1892'
'TKEY' (Initial key)                                '1B'
'TLEN' (Length)                                     '116000'
'TPE1' (Lead performer(s)/Soloist(s))               "Issler's Orchestra"
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['pkt 0', 'instrumental', 'all', 'grammophon', '1890s']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.12 dB'
'TXXX:replaygain_track_peak'                        '0.551216'

========================== row from database ==========================
                                              'id'  1497745
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/veryearly/1892/Issler_s Orchestra - Cannon Waltz 1892.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  116
                                           'genre'  prerock-swing
                                        'filesize'  2412762
                                           'mtime'  1620562711
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm veryearly Issler_s prerock swing
                                      'tag_artist'  Issler's Orchestra
                                     'tag_release'  None
                                       'tag_title'  Cannon Waltz 1892
                                             'bpm'  84.0
                                    'search_title'  '1892':3 'cannon':1 'waltz':2
                                   'search_artist'  'issler':1 'isslers':3 'orchestra':4 's':2
                                  'search_release'  
                                     'search_rest'  'issler':2 'prerock':4 's':3 'swing':5 'veryearly':1
                                    'search_combo'  '1892':3A 'cannon':1A 'issler':4B,9 'isslers':6B 'orchestra':7B 'prerock':11 's':5B,10 'swing':12 'veryearly':8 'waltz':2A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  1B
                                           '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-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['pkt 0', 'instrumental', 'all', 'grammophon', '1890s']
                                        'tag_date'  1892
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620562710.6612234  (2021-05-09 14:18:30)
                             'size'  2412762