======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '191'
                                          'artist'  'Glenn Miller'
                                     'text_people'  ''
                                         'release'  'Complete Bluebird 1938 - 1942 09'
                                           'title'  "It's Always You"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['big band', 'jazz', '40s', 'oldies', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '01'
                                      'tracktotal'  ''
                                            'date'  '1940'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-soft-swing'
                                             'bpm'  '143.925'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Complete Bluebird 1938 - 1942 09'
'TBPM' (BPM (beats per minute))                     '143.925'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-soft-swing'
'TDRC' (Recording time)                             '1940'
'TIT2' (Title/songname/content description)         "It's Always You"
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Glenn Miller'
'TRCK' (Track number/Position in set)               '01'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['big band', 'jazz', '40s', 'oldies', 'swing']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'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'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.42 dB'
'TXXX:replaygain_track_peak'                        '0.475315'

========================== row from database ==========================
                                              'id'  1502860
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Complete Bluebird 1938-1942 09/01 - It_s Always You - Glenn Miller.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  191
                                           'genre'  prerock-jb-jazz-soft-swing
                                        'filesize'  4591931
                                           'mtime'  1620528388
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 01 It_s prerock jb jazz soft swing
                                      'tag_artist'  Glenn Miller
                                     'tag_release'  Complete Bluebird 1938 - 1942 09
                                       'tag_title'  It's Always You
                                             'bpm'  143.925
                                    'search_title'  'always':4 'it':1 'its':3 's':2 'you':5
                                   'search_artist'  'glenn':1 'miller':2
                                  'search_release'  '1938':3 '1942':4 'bluebird':2 'complete':1
                                     'search_rest'  'country':4 'exotica':2 'it':5 'jazz':1 'jb':8 'oldies':3 'prerock':7 's':6 'soft':9 'swing':10
                                    'search_combo'  '1938':10C '1942':11C 'always':4A 'bluebird':9C 'complete':8C 'country':15 'exotica':13 'glenn':6B 'it':1A,16 'its':3A 'jazz':12 'jb':19 'miller':7B 'oldies':14 'prerock':18 's':2A,17 'soft':20 'swing':21 'you':5A
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['big band', 'jazz', '40s', 'oldies', 'swing']
                                        'tag_date'  1940
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620528387.9628556  (2021-05-09 04:46:27)
                             'size'  4591931