======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '175'
                                          'artist'  'The Crew-Cuts'
                                     'text_people'  ''
                                         'release'  'Mercury 70529'
                                           'title'  'Earth Angel'
                                           'quals'  ("['Q-JZFKS-2', 'Q-UNU-1', 'Q-LOCALNESS-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'  "['american', 'jazz', 'group', '50s', 'oldies']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '030'
                                      'tracktotal'  ''
                                            'date'  '1955'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '139.178'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Mercury 70529'
'TBPM' (BPM (beats per minute))                     '139.178'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1955'
'TIT2' (Title/songname/content description)         'Earth Angel'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Crew-Cuts'
'TPUB' (Publisher)                                  'Mercury'
'TRCK' (Track number/Position in set)               '030'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['american', 'jazz', 'group', '50s', 'oldies']
'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'                        '+2.10 dB'
'TXXX:replaygain_track_peak'                        '0.512022'

========================== row from database ==========================
                                              'id'  1441589
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1955/1955-030 - The Crew-Cuts - Earth Angel.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  175
                                           'genre'  prerock-vocal
                                        'filesize'  7048978
                                           'mtime'  1620385798
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1955 1955 030 prerock vocal
                                      'tag_artist'  The Crew-Cuts
                                     'tag_release'  Mercury 70529
                                       'tag_title'  Earth Angel
                                             'bpm'  139.178
                                    'search_title'  'angel':2 'earth':1
                                   'search_artist'  'crew':2 'crewcuts':4 'cuts':3 'the':1
                                  'search_release'  '70529':2 'mercury':1
                                     'search_rest'  '00oldiepop':5 '1955':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':7 'vocal':8
                                    'search_combo'  '00oldiepop':13 '1955':14 '70529':8C 'angel':2A 'country':12 'crew':4B 'crewcuts':6B 'cuts':5B 'earth':1A 'exotica':10 'jazz':9 'mercury':7C 'oldies':11 'prerock':15 'the':3B 'vocal':16
                                    'tag_tracknum'  30
                                      'num_images'  1
                                             'key'  6A
                                           '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-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-2', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['american', 'jazz', 'group', '50s', 'oldies']
                                        'tag_date'  1955
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620385798.0937274  (2021-05-07 13:09:58)
                             'size'  7048978