======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '143'
                                          'artist'  'Don Robertson'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'The Happy Whistler'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', '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-4', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['new age', 'space ambient', 'space synth', 'ambient']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '042'
                                      'tracktotal'  ''
                                            'date'  '1956'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '99.128'
                                             'key'  '5B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '99.128'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1956'
'TIT2' (Title/songname/content description)         'The Happy Whistler'
'TKEY' (Initial key)                                '5B'
'TPE1' (Lead performer(s)/Soloist(s))               'Don Robertson'
'TRCK' (Track number/Position in set)               '042'
'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'                                  'electronic'
'TXXX:lastfmtags'                                   ['new age', 'space ambient', 'space synth', 'ambient']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+1.99 dB'
'TXXX:replaygain_track_peak'                        '0.596157'

========================== row from database ==========================
                                              'id'  1432981
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1956/1956-042 - Don Robertson - The Happy Whistler.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  143
                                           'genre'  prerock-unsorted
                                        'filesize'  5753775
                                           'mtime'  1621698257
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1956 1956 042 prerock unsorted
                                      'tag_artist'  Don Robertson
                                     'tag_release'  None
                                       'tag_title'  The Happy Whistler
                                             'bpm'  99.128
                                    'search_title'  'happy':2 'the':1 'whistler':3
                                   'search_artist'  'don':1 'robertson':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1956':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':7 'unsorted':8
                                    'search_combo'  '00oldiepop':10 '1956':11 'country':9 'don':4B 'exotica':7 'happy':2A 'jazz':6 'oldies':8 'prerock':12 'robertson':5B 'the':1A 'unsorted':13 'whistler':3A
                                    'tag_tracknum'  42
                                      'num_images'  0
                                             'key'  5B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-4', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['new age', 'space ambient', 'space synth', 'ambient']
                                        'tag_date'  1956
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1621698257.291711  (2021-05-22 17:44:17)
                             'size'  5753775