======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '168'
                                          'artist'  'Harry Roy'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'She Had To Go And Lose It At The Astor (vocal - Bill Currie)'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz', 'big band', 'british', 'swing']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1940'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '112.3'
                                             'key'  '8A'
                                        '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))                     '112.3'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1940-04-03'
'TIT2' (Title/songname/content description)         'She Had To Go And Lose It At The Astor (vocal - Bill Currie)'
'TKEY' (Initial key)                                '8A'
'TLEN' (Length)                                     '168000'
'TPE1' (Lead performer(s)/Soloist(s))               'Harry Roy'
'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:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ['jazz', 'big band', 'british', 'swing']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'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'                        '+2.47 dB'
'TXXX:replaygain_track_peak'                        '0.527356'

========================== row from database ==========================
                                              'id'  1468863
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1940/Harry Roy - She Had To Go And Lose It At The Astor (vocal - Bill Currie) 3-4-1940.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  168
                                           'genre'  prerock-band
                                        'filesize'  3403874
                                           'mtime'  1620560816
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1940 3 4 1940 prerock band
                                      'tag_artist'  Harry Roy
                                     'tag_release'  None
                                       'tag_title'  She Had To Go And Lose It At The Astor (vocal - Bill Currie)
                                             'bpm'  112.3
                                    'search_title'  'and':5 'astor':10 'at':8 'bill':13 'currie':14,15 'go':4 'had':2 'it':7 'lose':6 'she':1 'the':9 'to':3 'vocal':11,12
                                   'search_artist'  'harry':1 'roy':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1940':6 '3':7 '4':8 'band':10 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':9
                                    'search_combo'  '00oldiepop':22 '1940':23 '3':24 '4':25 'and':5A 'astor':10A 'at':8A 'band':27 'bill':13A 'country':21 'currie':14A,15A 'exotica':19 'go':4A 'had':2A 'harry':16B 'it':7A 'jazz':18 'lose':6A 'oldies':20 'prerock':26 'roy':17B 'she':1A 'the':9A 'to':3A 'vocal':11A,12A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  8A
                                           '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-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['jazz', 'big band', 'british', 'swing']
                                        'tag_date'  1940
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620560815.8524253  (2021-05-09 13:46:55)
                             'size'  3403874