======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '628'
                                          'artist'  'Heldon'
                                     'text_people'  ''
                                         'release'  'Heldon IV - Agneta Nilsson'
                                           'title'  'Perspective I'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-OLDST-2', "
 "'Q-LOCALNESS-3', 'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['electronic', 'avant garde', 'progressive rock', 'french', 'psychedelic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'rock-cppex-progressive'
                                             'bpm'  '141.9'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Heldon IV - Agneta Nilsson'
'TBPM' (BPM (beats per minute))                     '141.9'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-progressive'
'TIT2' (Title/songname/content description)         'Perspective I'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Heldon'
'TPE2' (Band/orchestra/accompaniment)               'Heldon'
'TRCK' (Track number/Position in set)               '1'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:date'                                         '1976'
'TXXX:lastfmtags'                                   ['electronic', 'avant garde', 'progressive rock', 'french', 'psychedelic']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'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'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.09 dB'
'TXXX:replaygain_track_peak'                        '0.704749'

========================== row from database ==========================
                                              'id'  1416743
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/Heldon IV - Agneta Nilsson (1976)/01 perspective i.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  628
                                           'genre'  rock-cppex-progressive
                                        'filesize'  20098814
                                           'mtime'  1620736189
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy (1976) 01 perspective rock cppex progressive
                                      'tag_artist'  Heldon
                                     'tag_release'  Heldon IV - Agneta Nilsson
                                       'tag_title'  Perspective I
                                             'bpm'  141.9
                                    'search_title'  'i':2 'perspective':1
                                   'search_artist'  'heldon':1
                                  'search_release'  'agneta':3 'heldon':1 'iv':2 'nilsson':4
                                     'search_rest'  '1976':2,3 'classicprogpsy':1 'cppex':6 'perspective':4 'progressive':7 'rock':5
                                    'search_combo'  '1976':9,10 'agneta':6C 'classicprogpsy':8 'cppex':13 'heldon':3B,4C 'i':2A 'iv':5C 'nilsson':7C 'perspective':1A,11 'progressive':14 'rock':12
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['electronic', 'avant garde', 'progressive rock', 'french', 'psychedelic']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620736188.52506  (2021-05-11 14:29:48)
                             'size'  20098814