======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '135'
                                          'artist'  "Ernst van 't Hoff"
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Poor Butterfly'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', '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-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1941'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '145.9'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:MusicMatch_Bio:eng'                           'Sound edited by Breda4@hotmail.com'
'TBPM' (BPM (beats per minute))                     '145.9'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1941-07'
'TIT2' (Title/songname/content description)         'Poor Butterfly'
'TKEY' (Initial key)                                '6A'
'TLEN' (Length)                                     '135000'
'TPE1' (Lead performer(s)/Soloist(s))               "Ernst van 't Hoff"
'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: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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.21 dB'
'TXXX:replaygain_track_peak'                        '0.461630'

========================== row from database ==========================
                                              'id'  1506859
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1941/Ernst van _t Hoff - Poor Butterfly -7-1941.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  135
                                           'genre'  prerock-vocal
                                        'filesize'  2741685
                                           'mtime'  1620666490
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1941 _t 7 1941 prerock vocal
                                      'tag_artist'  Ernst van 't Hoff
                                     'tag_release'  None
                                       'tag_title'  Poor Butterfly
                                             'bpm'  145.9
                                    'search_title'  'butterfly':2 'poor':1
                                   'search_artist'  'ernst':1 'hoff':5 't':3,4 'van':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1941':6 '7':8 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':9 't':7 'vocal':10
                                    'search_combo'  '00oldiepop':12 '1941':13 '7':15 'butterfly':2A 'country':11 'ernst':3B 'exotica':9 'hoff':7B 'jazz':8 'oldies':10 'poor':1A 'prerock':16 't':5B,6B,14 'van':4B 'vocal':17
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', '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-4', 'Q-HAP-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1941
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620666489.9510298  (2021-05-10 19:08:09)
                             'size'  2741685