======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '62'
                                          'artist'  'Dr Who'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Dr Who (K9 Calculus Mix)'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-OLDST-3', "
 "'Q-LOCALNESS-2', 'q-syn-3', 'q-bass-4', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-1', "
 "'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'  '2007'
                                        'comments'  ''
                                           'genre'  'soundtrack-video-series'
                                             'bpm'  '142.108'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TBPM' (BPM (beats per minute))                     '142.108'
'TCON' (Content type, a.k.a. Genre)                 'soundtrack-video-series'
'TDRC' (Recording time)                             '2007'
'TIT2' (Title/songname/content description)         'Dr Who (K9 Calculus Mix)'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Decus'
'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-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'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-3.29 dB'
'TXXX:replaygain_track_peak'                        '0.895219'

========================== row from database ==========================
                                              'id'  980327
                                            'path'  /data/Music/Bulk/0soundtrack/Dr Who - Collection/Dr Who - K9 Calculus Mix - By Decus.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  62
                                           'genre'  soundtrack-video-series
                                        'filesize'  2695046
                                           'mtime'  1636921524
                                   'redo_metaread'  0
                                        'rest_str'   0soundtrack Collection By Decus soundtrack video series
                                      'tag_artist'  Dr Who
                                     'tag_release'  None
                                       'tag_title'  Dr Who (K9 Calculus Mix)
                                             'bpm'  142.108
                                    'search_title'  'calculus':5 'dr':1 'k9':3,4 'mix':6,7 'who':2
                                   'search_artist'  'dr':1 'who':2
                                  'search_release'  
                                     'search_rest'  '0soundtrack':1 'by':3 'collection':2 'decus':4 'series':7 'soundtrack':5 'video':6
                                    'search_combo'  '0soundtrack':10 'by':12 'calculus':5A 'collection':11 'decus':13 'dr':1A,8B 'k9':3A,4A 'mix':6A,7A 'series':16 'soundtrack':14 'video':15 'who':2A,9B
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-4', 'q-syn-3', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['doctor who', 'soundtrack', 'awesome', 'british', 'audiobook']
                                        'tag_date'  2007
                                     'discogstags'  ['house', 'electronic', 'euro house']

============================== file details ==============================
                                           'mtime'  1636921524.2363434  (2021-11-14 21:25:24)
                             'size'  2695046