======================== unified (from filesystem) ========================
                                         'bitrate'  '246.805'
                                        'duration'  '648'
                                          'artist'  'Heldon'
                                     'text_people'  ''
                                         'release'  'Heldon IV - Agneta Nilsson'
                                           'title'  'Perspective III (Baader-Meinhof Blues)'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-OLDST-2', "
 "'Q-LOCALNESS-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', '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'  '3'
                                      'tracktotal'  ''
                                            'date'  '1976'
                                        'comments'  ''
                                           'genre'  'rock-cppex-progressive'
                                             'bpm'  '113.326'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Heldon IV - Agneta Nilsson'
'TBPM' (BPM (beats per minute))                     '113.326'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-progressive'
'TDRC' (Recording time)                             '1976'
'TIT2' (Title/songname/content description)         'Perspective III (Baader-Meinhof Blues)'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Heldon'
'TPE2' (Band/orchestra/accompaniment)               'Heldon'
'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'                                      '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['electronic', 'avant garde', 'progressive rock', 'french', 'psychedelic']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-1.09 dB'
'TXXX:replaygain_track_peak'                        '0.843523'

========================== row from database ==========================
                                              'id'  1413724
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/Heldon/Heldon - Heldon IV - Agneta Nilsson/03 - Perspective III (Baader-Meinhof Blues).mp3
                                         'working'  None
                                         'bitrate'  246
                                    'duration_sec'  648
                                           'genre'  rock-cppex-progressive
                                        'filesize'  19998612
                                           'mtime'  1620736195
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy 03 rock cppex progressive
                                      'tag_artist'  Heldon
                                     'tag_release'  Heldon IV - Agneta Nilsson
                                       'tag_title'  Perspective III (Baader-Meinhof Blues)
                                             'bpm'  113.326
                                    'search_title'  'baader':3 'baadermeinhof':5 'blues':6,7 'iii':2 'meinhof':4 'perspective':1
                                   'search_artist'  'heldon':1
                                  'search_release'  'agneta':3 'heldon':1 'iv':2 'nilsson':4
                                     'search_rest'  'classicprogpsy':1 'cppex':3 'progressive':4 'rock':2
                                    'search_combo'  'agneta':11C 'baader':3A 'baadermeinhof':5A 'blues':6A,7A 'classicprogpsy':13 'cppex':15 'heldon':8B,9C 'iii':2A 'iv':10C 'meinhof':4A 'nilsson':12C 'perspective':1A 'progressive':16 'rock':14
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['electronic', 'avant garde', 'progressive rock', 'french', 'psychedelic']
                                        'tag_date'  1976
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620736194.5576582  (2021-05-11 14:29:54)
                             'size'  19998612