======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '166'
                                          'artist'  'Leslie Hutchinson'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Back To Those Happy Days'
                                           'quals'  ("['Q-JZFKS-2', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'Q-PLAY-2', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-chart-1', "
 "'q-drums-1', 'q-other-1', 'q-vocals-4', 'q-mixbeat-1', 'Q-PIANO-4']")
                                      'lastfmtags'  "['spotify', 'all', 'jazz', '30s', 'big band swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1935'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '144.4'
                                             '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))                     '144.4'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1935-02-06'
'TIT2' (Title/songname/content description)         'Back To Those Happy Days'
'TKEY' (Initial key)                                '6A'
'TLEN' (Length)                                     '166000'
'TPE1' (Lead performer(s)/Soloist(s))               'Leslie Hutchinson'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['spotify', 'all', 'jazz', '30s', 'big band 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'                                      '1'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.93 dB'
'TXXX:replaygain_track_peak'                        '0.920499'

========================== row from database ==========================
                                              'id'  1461674
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1935/Leslie Hutchinson - Back To Those Happy Days 6-2-1935.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  166
                                           'genre'  prerock-vocal
                                        'filesize'  3357886
                                           'mtime'  1620385105
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1935 6 2 1935 prerock vocal
                                      'tag_artist'  Leslie Hutchinson
                                     'tag_release'  None
                                       'tag_title'  Back To Those Happy Days
                                             'bpm'  144.4
                                    'search_title'  'back':1 'days':5 'happy':4 'those':3 'to':2
                                   'search_artist'  'hutchinson':2 'leslie':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1935':6 '2':8 '6':7 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':9 'vocal':10
                                    'search_combo'  '00oldiepop':12 '1935':13 '2':15 '6':14 'back':1A 'country':11 'days':5A 'exotica':9 'happy':4A 'hutchinson':7B 'jazz':8 'leslie':6B 'oldies':10 'prerock':16 'those':3A 'to':2A 'vocal':17
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-4', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-1', 'Q-PLAY-2', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['spotify', 'all', 'jazz', '30s', 'big band swing']
                                        'tag_date'  1935
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620385105.4576414  (2021-05-07 12:58:25)
                             'size'  3357886