======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '124'
                                          'artist'  'Dr Who'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'The Doctor Who Could Have Been'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-OLDST-3', "
 "'Q-LOCALNESS-2', 'q-syn-3', 'Q-PLAY-2', 'q-bass-4', 'q-busy-2', 'q-grit-2', "
 "'Q-PIANO-2', 'q-chart-2', 'q-drums-3', 'q-other-3', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['doctor who', 'soundtrack', 'awesome', 'british', 'audiobook']"
                                     'discogstags'  "['house', 'electronic', 'euro house']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2010'
                                        'comments'  ''
                                           'genre'  'soundtrack-video-series'
                                             'bpm'  '141.512'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '141.512'
'TCON' (Content type, a.k.a. Genre)                 'soundtrack-video-series'
'TDRC' (Recording time)                             '2010'
'TIT2' (Title/songname/content description)         'The Doctor Who Could Have Been'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Forrest'
'TPE2' (Band/orchestra/accompaniment)               'Dr Who'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['house', 'electronic', 'euro house']
'TXXX:lastfmtags'                                   ['doctor who', 'soundtrack', 'awesome', 'british', 'audiobook']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+0.80 dB'
'TXXX:replaygain_track_peak'                        '0.436972'

========================== row from database ==========================
                                              'id'  979811
                                            'path'  /data/Music/Bulk/0soundtrack/Dr Who - Collection/Dr Who - The Doctor Who Could Have Been - By Forrest.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  124
                                           'genre'  soundtrack-video-series
                                        'filesize'  3001013
                                           'mtime'  1636921541
                                   'redo_metaread'  0
                                        'rest_str'   0soundtrack Collection By Forrest soundtrack video series
                                      'tag_artist'  Dr Who
                                     'tag_release'  None
                                       'tag_title'  The Doctor Who Could Have Been
                                             'bpm'  141.512
                                    'search_title'  'been':6 'could':4 'doctor':2 'have':5 'the':1 'who':3
                                   'search_artist'  'dr':1 'who':2
                                  'search_release'  
                                     'search_rest'  '0soundtrack':1 'by':3 'collection':2 'forrest':4 'series':7 'soundtrack':5 'video':6
                                    'search_combo'  '0soundtrack':9 'been':6A 'by':11 'collection':10 'could':4A 'doctor':2A 'dr':7B 'forrest':12 'have':5A 'series':15 'soundtrack':13 'the':1A 'video':14 'who':3A,8B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-2', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-3', 'q-syn-3', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['doctor who', 'soundtrack', 'awesome', 'british', 'audiobook']
                                        'tag_date'  2010
                                     'discogstags'  ['house', 'electronic', 'euro house']

============================== file details ==============================
                                           'mtime'  1636921540.9950852  (2021-11-14 21:25:40)
                             'size'  3001013