======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '378'
                                          'artist'  'Pachelbel'
                                     'text_people'  ''
                                         'release'  'Lifescapes'
                                           'title'  'Canon In D (Piano Solo)'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'Q-PLAY-3', 'q-bass-1', 'q-busy-2', 'q-grit-2', "
 "'Q-PIANO-4', 'q-chart-3', 'q-drums-1', 'q-other-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['classical', 'baroque', 'instrumental', 'composers', 'classic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1996'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '103.062'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Lifescapes'
'TBPM' (BPM (beats per minute))                     '103.062'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '1996'
'TIT2' (Title/songname/content description)         'Canon In D (Piano Solo)'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Pachelbel'
'TXXX:Q-HAP'                                        '3'
'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:lastfmtags'                                   ['classical', 'baroque', 'instrumental', 'composers', 'classic']
'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'                                      '1'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+3.68 dB'
'TXXX:replaygain_track_peak'                        '0.870218'

========================== row from database ==========================
                                              'id'  1521010
                                            'path'  /data/Music/Bulk/00instruments-classical/Pachelbel/Classical - Bach - Pachebel_s Canon (Piano Solo).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  378
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  6066822
                                           'mtime'  1620574212
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical Classical Bach Pachebel_s prerock classical or classical instruments
                                      'tag_artist'  Pachelbel
                                     'tag_release'  Lifescapes
                                       'tag_title'  Canon In D (Piano Solo)
                                             'bpm'  103.062
                                    'search_title'  'canon':1 'd':3 'in':2 'piano':4,5 'solo':6,7
                                   'search_artist'  'pachelbel':1
                                  'search_release'  'lifescapes':1
                                     'search_rest'  '00instruments':1 'bach':3 'classical':2 'instruments':8 'or':7 'pachebel':4 'prerock':6 's':5
                                    'search_combo'  '00instruments':10 'bach':12 'canon':1A 'classical':11 'd':3A 'in':2A 'instruments':17 'lifescapes':9C 'or':16 'pachebel':13 'pachelbel':8B 'piano':4A,5A 'prerock':15 's':14 'solo':6A,7A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           '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-3', 'Q-PLAY-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['classical', 'baroque', 'instrumental', 'composers', 'classic']
                                        'tag_date'  1996
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620574212.2594373  (2021-05-09 17:30:12)
                             'size'  6066822