======================== unified (from filesystem) ========================
                                         'bitrate'  '319.725'
                                        'duration'  '186'
                                          'artist'  'Kay Starr'
                                     'text_people'  ''
                                         'release'  'The Essential RCA Singles Collection'
                                           'title'  'The Things I Never Had'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz', 'female vocalists', '50s', 'oldies', 'swing']"
                                     'discogstags'  "['big band', 'vocal', 'jazz', 'pop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '471'
                                      'tracktotal'  ''
                                            'date'  '1956'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '134.556'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Essential RCA Singles Collection'
'TBPM' (BPM (beats per minute))                     '134.556'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1956'
'TENC' (Encoded by)                                 'Exact Audio Copy   (Secure mode)'
'TIT2' (Title/songname/content description)         'The Things I Never Had'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Kay Starr'
'TRCK' (Track number/Position in set)               '471'
'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'                                  ['big band', 'vocal', 'jazz', 'pop']
'TXXX:lastfmtags'                                   ['jazz', 'female vocalists', '50s', 'oldies', 'swing']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+9.98 dB'
'TXXX:replaygain_track_peak'                        '0.105731'

========================== row from database ==========================
                                              'id'  1434998
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1956/1956-471 - Kay Starr - The Things I Never Had.mp3
                                         'working'  None
                                         'bitrate'  319
                                    'duration_sec'  186
                                           'genre'  prerock-vocal
                                        'filesize'  7442636
                                           'mtime'  1621853351
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1956 1956 471 prerock vocal
                                      'tag_artist'  Kay Starr
                                     'tag_release'  The Essential RCA Singles Collection
                                       'tag_title'  The Things I Never Had
                                             'bpm'  134.556
                                    'search_title'  'had':5 'i':3 'never':4 'the':1 'things':2
                                   'search_artist'  'kay':1 'starr':2
                                  'search_release'  'collection':5 'essential':2 'rca':3 'singles':4 'the':1
                                     'search_rest'  '00oldiepop':5 '1956':6 '471':7 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':8 'vocal':9
                                    'search_combo'  '00oldiepop':17 '1956':18 '471':19 'collection':12C 'country':16 'essential':9C 'exotica':14 'had':5A 'i':3A 'jazz':13 'kay':6B 'never':4A 'oldies':15 'prerock':20 'rca':10C 'singles':11C 'starr':7B 'the':1A,8C 'things':2A 'vocal':21
                                    'tag_tracknum'  471
                                      'num_images'  0
                                             'key'  8A
                                           '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-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['jazz', 'female vocalists', '50s', 'oldies', 'swing']
                                        'tag_date'  1956
                                     'discogstags'  ['big band', 'vocal', 'jazz', 'pop']

============================== file details ==============================
                                           'mtime'  1621853351.1189458  (2021-05-24 12:49:11)
                             'size'  7442636