======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '190'
                                          'artist'  'Red Norvo'
                                     'text_people'  ''
                                         'release'  '1920s and 1930s popular'
                                           'title'  'I Surrender Dear'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-JZFKS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['swing', 'jazz', 'vibraphone', 'jazz vibraphone', 'bebop']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1935'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '134.021'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     '1920s and 1930s popular'
'TBPM' (BPM (beats per minute))                     '134.021'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1935'
'TIT2' (Title/songname/content description)         'I Surrender Dear'
'TKEY' (Initial key)                                '9A'
'TLEN' (Length)                                     '190302'
'TPE1' (Lead performer(s)/Soloist(s))               'Red Norvo'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'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'                                  'jazz'
'TXXX:lastfmtags'                                   ['swing', 'jazz', 'vibraphone', 'jazz vibraphone', 'bebop']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'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'                        '+0.94 dB'
'TXXX:replaygain_track_peak'                        '0.604697'

========================== row from database ==========================
                                              'id'  1148256
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Red Norvo All Star Sextett, Mildred Bailey - I surrender dear.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  190
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  3059579
                                           'mtime'  1620524776
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop All Star Sextett, Mildred Bailey surrender dear prerock jb jazz unsorted
                                      'tag_artist'  Red Norvo
                                     'tag_release'  1920s and 1930s popular
                                       'tag_title'  I Surrender Dear
                                             'bpm'  134.021
                                    'search_title'  'dear':3 'i':1 'surrender':2
                                   'search_artist'  'norvo':2 'red':1
                                  'search_release'  '1920s':1 '1930s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 'all':6 'bailey':11 'country':4 'dear':13 'exotica':2 'jazz':1 'jb':15 'mildred':10 'oldies':3 'prerock':14 'sextett':8,9 'star':7 'surrender':12 'unsorted':16
                                    'search_combo'  '00oldiepop':14 '1920s':6C '1930s':8C 'all':15 'and':7C 'bailey':20 'country':13 'dear':3A,22 'exotica':11 'i':1A 'jazz':10 'jb':24 'mildred':19 'norvo':5B 'oldies':12 'popular':9C 'prerock':23 'red':4B 'sextett':17,18 'star':16 'surrender':2A,21 'unsorted':25
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  9A
                                           '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-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['swing', 'jazz', 'vibraphone', 'jazz vibraphone', 'bebop']
                                        'tag_date'  1935
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620524775.5174863  (2021-05-09 03:46:15)
                             'size'  3059579