======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '458'
                                          'artist'  'The Moody Blues'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Nights In White Satin'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['rock', 'progressive rock', 'psychedelic', '60s', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1985'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic;set-pl-billboard'
                                             'bpm'  '144.3'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '144.3'
'TCON' (Content type, a.k.a. Genre)                 ['rock-cppex-classic', 'set-pl-billboard']
'TDRC' (Recording time)                             '1985'
'TIT2' (Title/songname/content description)         'Nights In White Satin'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Moody Blues'
'TXXX:Mp3gain_minmax'                               '108,191'
'TXXX:Mp3gain_undo'                                 '+002,+002,N'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['rock', 'progressive rock', 'psychedelic', '60s', 'classic rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.62 dB'
'TXXX:replaygain_track_peak'                        '0.662197'

========================== row from database ==========================
                                              'id'  1298808
                                            'path'  /data/Music/Bulk/00poprockelectronic/Moody Blues/Moody Blues - Nights In White Satin.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  458
                                           'genre'  rock-cppex-classic;set-pl-billboard
                                        'filesize'  7344489
                                           'mtime'  1636039309
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic rock cppex classic;set pl billboard
                                      'tag_artist'  The Moody Blues
                                     'tag_release'  None
                                       'tag_title'  Nights In White Satin
                                             'bpm'  144.3
                                    'search_title'  'in':2 'nights':1 'satin':4 'white':3
                                   'search_artist'  'blues':3 'moody':2 'the':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'billboard':9 'classic':4,6 'cppex':3 'pl':8 'rock':2 'set':5,7
                                    'search_combo'  '00poprockelectronic':8 'billboard':16 'blues':7B 'classic':11,13 'cppex':10 'in':2A 'moody':6B 'nights':1A 'pl':15 'rock':9 'satin':4A 'set':12,14 'the':5B 'white':3A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['rock', 'progressive rock', 'psychedelic', '60s', 'classic rock']
                                        'tag_date'  1985
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636039308.5920832  (2021-11-04 16:21:48)
                             'size'  7344489