======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '408'
                                          'artist'  'Claude Debussy'
                                     'text_people'  ''
                                         'release'  'Solitudes-exploring nature with music-'
                                           'title'  'Prelude to the Afternoon of a Faun'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['impressionist', 'composers', 'piano', 'french', 'classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '109.6'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Solitudes-exploring nature with music-'
'TBPM' (BPM (beats per minute))                     '109.6'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TIT2' (Title/songname/content description)         'Prelude to the Afternoon of a Faun'
'TKEY' (Initial key)                                '1A'
'TLEN' (Length)                                     '409182'
'TMED' (Media type)                                 'DIG'
'TPE1' (Lead performer(s)/Soloist(s))               'Claude Debussy'
'TRCK' (Track number/Position in set)               '3'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['impressionist', 'composers', 'piano', 'french', 'classical']
'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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+0.97 dB'
'TXXX:replaygain_track_peak'                        '0.640879'

========================== row from database ==========================
                                              'id'  1214179
                                            'path'  /data/Music/Bulk/00instruments-classical/Debussy/Debussy_-_Prelude_to_the_Afternoon_of_a_Faun.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  408
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  6541405
                                           'mtime'  1620561532
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical Debussy_ _Prelude_to_the_Afternoon_of_a_Faun prerock classical classical instruments
                                      'tag_artist'  Claude Debussy
                                     'tag_release'  Solitudes-exploring nature with music-
                                       'tag_title'  Prelude to the Afternoon of a Faun
                                             'bpm'  109.6
                                    'search_title'  'a':6 'afternoon':4 'faun':7 'of':5 'prelude':1 'the':3 'to':2
                                   'search_artist'  'claude':1 'debussy':2
                                  'search_release'  'exploring':2 'music':6,7 'nature':4 'solitudes':1 'solitudesexploring':3 'with':5
                                     'search_rest'  '00instruments':1 'a':9 'afternoon':7 'classical':2 'debussy':3 'faun':10 'instruments':12 'of':8 'prelude':4 'prerock':11 'the':6 'to':5
                                    'search_combo'  '00instruments':17 'a':6A,25 'afternoon':4A,23 'classical':18 'claude':8B 'debussy':9B,19 'exploring':11C 'faun':7A,26 'instruments':28 'music':15C,16C 'nature':13C 'of':5A,24 'prelude':1A,20 'prerock':27 'solitudes':10C 'solitudesexploring':12C 'the':3A,22 'to':2A,21 'with':14C
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-3', '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-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['impressionist', 'composers', 'piano', 'french', 'classical']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561531.85345  (2021-05-09 13:58:51)
                             'size'  6541405