======================== unified (from filesystem) ========================
                                         'bitrate'  '158.061'
                                        'duration'  '316'
                                          'artist'  'Joseph Haydn'
                                     'text_people'  ''
                                         'release'  'Aangenaam klassiek editie 1997'
                                           'title'  'Finale-Allegro con spirito - S'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['classical', 'baroque', 'austrian', 'composers', 'classic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1997'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '145.7'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Aangenaam klassiek editie 1997'
'TBPM' (BPM (beats per minute))                     '145.7'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '1997'
'TIT2' (Title/songname/content description)         'Finale-Allegro con spirito - S'
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'Joseph Haydn'
'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:lastfmtags'                                   ['classical', 'baroque', 'austrian', 'composers', 'classic']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.24 dB'
'TXXX:replaygain_track_peak'                        '0.894196'

========================== row from database ==========================
                                              'id'  1214264
                                            'path'  /data/Music/Bulk/00instruments-classical/Haydn J. - 16 - Finale-Allegro con spirito - Symfonie nr 103.mp3
                                         'working'  None
                                         'bitrate'  158
                                    'duration_sec'  316
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  6254524
                                           'mtime'  1620561578
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical J. 16 Symfonie nr 103 prerock classical or classical instruments
                                      'tag_artist'  Joseph Haydn
                                     'tag_release'  Aangenaam klassiek editie 1997
                                       'tag_title'  Finale-Allegro con spirito - S
                                             'bpm'  145.7
                                    'search_title'  'allegro':2 'con':4 'finale':1 'finaleallegro':3 's':6 'spirito':5
                                   'search_artist'  'haydn':2 'joseph':1
                                  'search_release'  '1997':4 'aangenaam':1 'editie':3 'klassiek':2
                                     'search_rest'  '00instruments':1 '103':7 'classical':2 'instruments':10 'j':3,4 'nr':6 'or':9 'prerock':8 'symfonie':5
                                    'search_combo'  '00instruments':13 '103':19 '1997':12C 'aangenaam':9C 'allegro':2A 'classical':14 'con':4A 'editie':11C 'finale':1A 'finaleallegro':3A 'haydn':8B 'instruments':22 'j':15,16 'joseph':7B 'klassiek':10C 'nr':18 'or':21 'prerock':20 's':6A 'spirito':5A 'symfonie':17
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-3', 'q-syn-1', 'q-chart-3', 'q-other-4', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['classical', 'baroque', 'austrian', 'composers', 'classic']
                                        'tag_date'  1997
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561578.4822874  (2021-05-09 13:59:38)
                             'size'  6254524