======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '129'
                                          'artist'  'Nat "King" Cole & The Four Nights'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "That's All There Is To That"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '113'
                                      'tracktotal'  ''
                                            'date'  '1956'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '92.857'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '92.857'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1956'
'TIT2' (Title/songname/content description)         "That's All There Is To That"
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'Nat "King" Cole & The Four Nights'
'TRCK' (Track number/Position in set)               '113'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.59 dB'
'TXXX:replaygain_track_peak'                        '0.823005'

========================== row from database ==========================
                                              'id'  1516397
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1956/1956-113 - Nat King Cole & The Four Nights - That_s All There Is To That.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  129
                                           'genre'  prerock-swing
                                        'filesize'  5199231
                                           'mtime'  1620562567
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1956 1956 113 That_s prerock swing
                                      'tag_artist'  Nat "King" Cole & The Four Nights
                                     'tag_release'  None
                                       'tag_title'  That's All There Is To That
                                             'bpm'  92.857
                                    'search_title'  'all':4 'is':6 's':2 'that':1,8 'thats':3 'there':5 'to':7
                                   'search_artist'  'cole':3 'four':5 'king':2 'nat':1 'nights':6 'the':4
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '113':7 '1956':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':10 's':9 'swing':11 'that':8
                                    'search_combo'  '00oldiepop':19 '113':21 '1956':20 'all':4A 'cole':11B 'country':18 'exotica':16 'four':13B 'is':6A 'jazz':15 'king':10B 'nat':9B 'nights':14B 'oldies':17 'prerock':24 's':2A,23 'swing':25 'that':1A,8A,22 'thats':3A 'the':12B 'there':5A 'to':7A
                                    'tag_tracknum'  113
                                      'num_images'  0
                                             'key'  4A
                                           '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-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-1', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1956
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620562566.7589386  (2021-05-09 14:16:06)
                             'size'  5199231