======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '314'
                                          'artist'  'Alonso Lobo'
                                     'text_people'  ''
                                         'release'  'Masses (Oxford Camerata feat.'
                                           'title'  'Versa est in luctum'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'q-syn-1', 'q-bass-1', "
 "'q-busy-2', 'q-grit-2', 'q-play-2', 'Q-OLDST-1', 'q-chart-3', 'q-drums-1', "
 "'q-other-3', 'q-piano-1', 'q-vocals-4', 'Q-HHRNBTT-1', 'q-mixbeat-1']")
                                      'lastfmtags'  "['renaissance', 'classical', 'early music', 'spanish', 'renaissance music']"
                                     'discogstags'  "['classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '15'
                                      'tracktotal'  ''
                                            'date'  '1992'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '143.517'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Masses (Oxford Camerata feat.'
'TBPM' (BPM (beats per minute))                     '143.517'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '1992'
'TIT2' (Title/songname/content description)         'Versa est in luctum'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Alonso Lobo'
'TRCK' (Track number/Position in set)               '15'
'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'                                  'classical'
'TXXX:lastfmtags'                                   ['renaissance', 'classical', 'early music', 'spanish', 'renaissance music']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.17 dB'
'TXXX:replaygain_track_peak'                        '0.740949'

========================== row from database ==========================
                                              'id'  203985
                                            'path'  /data/Music/Bulk/00instruments-classical/Unsorted/02 - versa est in luctum.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  314
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  10055450
                                           'mtime'  1620561854
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical Unsorted 02 versa prerock classical classical instruments
                                      'tag_artist'  Alonso Lobo
                                     'tag_release'  Masses (Oxford Camerata feat.
                                       'tag_title'  Versa est in luctum
                                             'bpm'  143.517
                                    'search_title'  'est':2 'in':3 'luctum':4 'versa':1
                                   'search_artist'  'alonso':1 'lobo':2
                                  'search_release'  'camerata':4 'feat':5,6 'masses':1 'oxford':2,3
                                     'search_rest'  '00instruments':1 'classical':2 'instruments':6 'prerock':5 'unsorted':3 'versa':4
                                    'search_combo'  '00instruments':13 'alonso':5B 'camerata':10C 'classical':14 'est':2A 'feat':11C,12C 'in':3A 'instruments':18 'lobo':6B 'luctum':4A 'masses':7C 'oxford':8C,9C 'prerock':17 'unsorted':15 'versa':1A,16
                                    'tag_tracknum'  15
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', '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-1', 'q-syn-1', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['renaissance', 'classical', 'early music', 'spanish', 'renaissance music']
                                        'tag_date'  1992
                                     'discogstags'  ['classical']

============================== file details ==============================
                                           'mtime'  1620561854.1922386  (2021-05-09 14:04:14)
                             'size'  10055450