======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '138'
                                          'artist'  'Ray Martin & His Orchestra'
                                     'text_people'  ''
                                         'release'  'The History of Space Age Pop, Vol. 3: Stereo Action Dimension'
                                           'title'  'Lullaby of the Leaves'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-2', "
 "'q-play-2', 'Q-JZFKS-2', 'Q-OLDST-2', 'q-chart-2', 'q-drums-2', 'q-other-4', "
 "'q-piano-1', 'q-vocals-1', 'Q-HHRNBTT-1', 'q-mixbeat-1', 'Q-LOCALNESS-2']")
                                      'lastfmtags'  "['lounge', 'all', 'exotica', 'farewell songs', 'easy listening']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '13'
                                      'tracktotal'  ''
                                            'date'  '1960'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-lounge or exotica or bossa'
                                             'bpm'  '145.2'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'The History of Space Age Pop, Vol. 3: Stereo Action Dimension'
'TBPM' (BPM (beats per minute))                     '145.2'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-lounge or exotica or bossa'
'TDRC' (Recording time)                             '1960'
'TIT2' (Title/songname/content description)         'Lullaby of the Leaves'
'TKEY' (Initial key)                                '3A'
'TLEN' (Length)                                     '138318'
'TPE1' (Lead performer(s)/Soloist(s))               'Ray Martin & His Orchestra'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '13'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['lounge', 'all', 'exotica', 'farewell songs', 'easy listening']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'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'                        '+1.26 dB'
'TXXX:replaygain_track_peak'                        '0.536846'

========================== row from database ==========================
                                              'id'  746156
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/va - space age pop & mid century domestics (jingles & themes)/(1960) ray martin & his orchestra - lullaby of the leaves.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  138
                                           'genre'  prerock-jb-jazz-lounge or exotica or bossa
                                        'filesize'  3329917
                                           'mtime'  1620539398
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm va space age pop mid century domestics (jingles themes) (1960) ray martin his orchestra lullaby leaves prerock jb jazz lounge exotica bossa
                                      'tag_artist'  Ray Martin & His Orchestra
                                     'tag_release'  The History of Space Age Pop, Vol. 3: Stereo Action Dimension
                                       'tag_title'  Lullaby of the Leaves
                                             'bpm'  145.2
                                    'search_title'  'leaves':4 'lullaby':1 'of':2 'the':3
                                   'search_artist'  'his':3 'martin':2 'orchestra':4 'ray':1
                                  'search_release'  '3':10,11 'action':13 'age':5 'dimension':14 'history':2 'of':3 'pop':6,7 'space':4 'stereo':12 'the':1 'vol':8,9
                                     'search_rest'  '1960':12,13 'age':3 'bossa':25 'century':6 'domestics':7 'exotica':24 'his':16 'jazz':22 'jb':21 'jingles':8,9 'leaves':19 'lounge':23 'lullaby':18 'martin':15 'mid':5 'orchestra':17 'pop':4 'prerock':20 'ray':14 'space':2 'themes':10,11 'va':1
                                    'search_combo'  '1960':34,35 '3':18C,19C 'action':21C 'age':13C,25 'bossa':47 'century':28 'dimension':22C 'domestics':29 'exotica':46 'his':7B,38 'history':10C 'jazz':44 'jb':43 'jingles':30,31 'leaves':4A,41 'lounge':45 'lullaby':1A,40 'martin':6B,37 'mid':27 'of':2A,11C 'orchestra':8B,39 'pop':14C,15C,26 'prerock':42 'ray':5B,36 'space':12C,24 'stereo':20C 'the':3A,9C 'themes':32,33 'va':23 'vol':16C,17C
                                    'tag_tracknum'  13
                                      'num_images'  1
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-2', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['lounge', 'all', 'exotica', 'farewell songs', 'easy listening']
                                        'tag_date'  1960
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620539397.646223  (2021-05-09 07:49:57)
                             'size'  3329917