======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '268'
                                          'artist'  'Ludovico Einaudi'
                                     'text_people'  ''
                                         'release'  'I Giorni'
                                           'title'  'Limbo'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'Q-PLAY-3', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', "
 "'Q-PIANO-4', 'q-chart-3', 'q-drums-1', 'q-other-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['contemporary classical', 'instrumental', 'piano', 'classical', 'ambient']"
                                     'discogstags'  "['classical', 'modern classical', 'contemporary']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '12'
                                      'tracktotal'  ''
                                            'date'  '2001'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments-contemporary'
                                             'bpm'  '139.178'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'PRIV:AverageLevel: \x04\x00\x00'                   PRIV(owner='AverageLevel', data=b' \x04\x00\x00')
'PRIV:PeakValue:V4\x00\x00'                         PRIV(owner='PeakValue', data=b'V4\x00\x00')
'TALB' (Album/Movie/Show title)                     'I Giorni'
'TBPM' (BPM (beats per minute))                     '139.178'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments-contemporary'
'TDRC' (Recording time)                             '2001'
'TIT2' (Title/songname/content description)         'Limbo'
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'Ludovico Einaudi'
'TRCK' (Track number/Position in set)               '12'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['classical', 'modern classical', 'contemporary']
'TXXX:lastfmtags'                                   ['contemporary classical', 'instrumental', 'piano', 'classical', 'ambient']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.07 dB'
'TXXX:replaygain_track_peak'                        '0.817795'

========================== row from database ==========================
                                              'id'  1336520
                                            'path'  /data/Music/Bulk/00instruments-classical/Ludovico Einaudi/I Giorni/ludovico einaudi - 12 - limbo.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  268
                                           'genre'  prerock-classical or classical instruments-contemporary
                                        'filesize'  8589010
                                           'mtime'  1637329798
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical ludovico einaudi 12 limbo prerock classical classical instruments contemporary
                                      'tag_artist'  Ludovico Einaudi
                                     'tag_release'  I Giorni
                                       'tag_title'  Limbo
                                             'bpm'  139.178
                                    'search_title'  'limbo':1
                                   'search_artist'  'einaudi':2 'ludovico':1
                                  'search_release'  'giorni':2 'i':1
                                     'search_rest'  '00instruments':1 'classical':2 'contemporary':8 'einaudi':4 'instruments':7 'limbo':5 'ludovico':3 'prerock':6
                                    'search_combo'  '00instruments':6 'classical':7 'contemporary':13 'einaudi':3B,9 'giorni':5C 'i':4C 'instruments':12 'limbo':1A,10 'ludovico':2B,8 'prerock':11
                                    'tag_tracknum'  12
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-4', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-1', 'Q-HAP-2', 'Q-PLAY-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['contemporary classical', 'instrumental', 'piano', 'classical', 'ambient']
                                        'tag_date'  2001
                                     'discogstags'  ['classical', 'modern classical', 'contemporary']

============================== file details ==============================
                                           'mtime'  1637329798.1554816  (2021-11-19 14:49:58)
                             'size'  8589010