======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '180'
                                          'artist'  'Harry James'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "I've Heard That Song Before"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-2', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['big band', 'jazz', 'trumpet', 'bebop', 'swing']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1942'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '120.6'
                                             '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))                     '120.6'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1942-07-31'
'TIT2' (Title/songname/content description)         "I've Heard That Song Before"
'TKEY' (Initial key)                                '8A'
'TLEN' (Length)                                     '180000'
'TPE1' (Lead performer(s)/Soloist(s))               'Harry James'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['big band', 'jazz', 'trumpet', 'bebop', 'swing']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.82 dB'
'TXXX:replaygain_track_peak'                        '0.627381'

========================== row from database ==========================
                                              'id'  1507049
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1942/Harry James - I_ve Heard That Song Before 31-7-1942.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  180
                                           'genre'  prerock-swing
                                        'filesize'  3672735
                                           'mtime'  1620561805
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1942 I_ve 31 7 1942 prerock swing
                                      'tag_artist'  Harry James
                                     'tag_release'  None
                                       'tag_title'  I've Heard That Song Before
                                             'bpm'  120.6
                                    'search_title'  'before':7 'heard':4 'i':1 'ive':3 'song':6 'that':5 've':2
                                   'search_artist'  'harry':1 'james':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1942':6 '31':9 '7':10 'country':4 'exotica':2 'i':7 'jazz':1 'oldies':3 'prerock':11 'swing':12 've':8
                                    'search_combo'  '00oldiepop':14 '1942':15 '31':18 '7':19 'before':7A 'country':13 'exotica':11 'harry':8B 'heard':4A 'i':1A,16 'ive':3A 'james':9B 'jazz':10 'oldies':12 'prerock':20 'song':6A 'swing':21 'that':5A 've':2A,17
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', '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-1', 'q-other-4', 'Q-HAP-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['big band', 'jazz', 'trumpet', 'bebop', 'swing']
                                        'tag_date'  1942
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1620561805.0097468  (2021-05-09 14:03:25)
                             'size'  3672735