======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '183'
                                          'artist'  'Fletcher Henderson'
                                     'text_people'  ''
                                         'release'  '1920s and 1930s popular'
                                           'title'  'Some Of These Days'
                                           '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-3', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['big band', 'jazz', 'ragtime', '20s', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1927'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-o-big band'
                                             'bpm'  '91.226'
                                             '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))                     '91.226'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-o-big band'
'TCOP' (Copyright message)                          '1926-28'
'TDRC' (Recording time)                             '1927'
'TIT2' (Title/songname/content description)         'Some Of These Days'
'TKEY' (Initial key)                                '9A'
'TLEN' (Length)                                     '183797'
'TPE1' (Lead performer(s)/Soloist(s))               'Fletcher Henderson'
'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:lastfmtags'                                   ['big band', 'jazz', 'ragtime', '20s', 'swing']
'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'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+1.98 dB'
'TXXX:replaygain_track_peak'                        '0.500105'

========================== row from database ==========================
                                              'id'  1139700
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Fletcher Henderson & His Orchestra - Some Of These Days 1927.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  183
                                           'genre'  prerock-jb-jazz-o-big band
                                        'filesize'  2953110
                                           'mtime'  1620524530
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop & His Orchestra 1927 prerock jb jazz big band
                                      'tag_artist'  Fletcher Henderson
                                     'tag_release'  1920s and 1930s popular
                                       'tag_title'  Some Of These Days
                                             'bpm'  91.226
                                    'search_title'  'days':4 'of':2 'some':1 'these':3
                                   'search_artist'  'fletcher':1 'henderson':2
                                  'search_release'  '1920s':1 '1930s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1927':8 'band':12 'big':11 'country':4 'exotica':2 'his':6 'jazz':1 'jb':10 'oldies':3 'orchestra':7 'prerock':9
                                    'search_combo'  '00oldiepop':15 '1920s':7C '1927':18 '1930s':9C 'and':8C 'band':22 'big':21 'country':14 'days':4A 'exotica':12 'fletcher':5B 'henderson':6B 'his':16 'jazz':11 'jb':20 'of':2A 'oldies':13 'orchestra':17 'popular':10C 'prerock':19 'some':1A 'these':3A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', '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'  ['big band', 'jazz', 'ragtime', '20s', 'swing']
                                        'tag_date'  1927
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620524530.181754  (2021-05-09 03:42:10)
                             'size'  2953110