======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '156'
                                          'artist'  'Ray Noble'
                                     'text_people'  ''
                                         'release'  'HMV B-6305'
                                           'title'  'Just An Echo In The Valley (vocal - Al Bowlly)'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-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-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['all', 'jazz', 'orchestral jazz']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1933'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '87.0'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:MusicMatch_Bio:eng'                           'Sound edited by Breda4@hotmail.com'
'TALB' (Album/Movie/Show title)                     'HMV B-6305'
'TBPM' (BPM (beats per minute))                     '87.0'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1933-01-12'
'TIT2' (Title/songname/content description)         'Just An Echo In The Valley (vocal - Al Bowlly)'
'TKEY' (Initial key)                                '10B'
'TLEN' (Length)                                     '156000'
'TPE1' (Lead performer(s)/Soloist(s))               'Ray Noble'
'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'                                   ['all', 'jazz', 'orchestral jazz']
'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'                                     '2'
'TXXX:replaygain_track_gain'                        '+2.09 dB'
'TXXX:replaygain_track_peak'                        '0.770386'

========================== row from database ==========================
                                              'id'  1473214
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1933/Ray Noble - Just An Echo In The Valley (vocal - Al Bowlly) 12-1-1933.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  156
                                           'genre'  prerock-band
                                        'filesize'  2566851
                                           'mtime'  1620560150
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1933 12 1 1933 prerock band
                                      'tag_artist'  Ray Noble
                                     'tag_release'  HMV B-6305
                                       'tag_title'  Just An Echo In The Valley (vocal - Al Bowlly)
                                             'bpm'  87.0
                                    'search_title'  'al':9 'an':2 'bowlly':10,11 'echo':3 'in':4 'just':1 'the':5 'valley':6 'vocal':7,8
                                   'search_artist'  'noble':2 'ray':1
                                  'search_release'  '6305':3 'b':2 'b6305':4 'hmv':1
                                     'search_rest'  '00oldiepop':5 '1':7 '1933':6 'band':9 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':8
                                    'search_combo'  '00oldiepop':22 '1':24 '1933':23 '6305':16C 'al':9A 'an':2A 'b':15C 'b6305':17C 'band':26 'bowlly':10A,11A 'country':21 'echo':3A 'exotica':19 'hmv':14C 'in':4A 'jazz':18 'just':1A 'noble':13B 'oldies':20 'prerock':25 'ray':12B 'the':5A 'valley':6A 'vocal':7A,8A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', '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'  ['all', 'jazz', 'orchestral jazz']
                                        'tag_date'  1933
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620560149.7578506  (2021-05-09 13:35:49)
                             'size'  2566851