======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '207'
                                          'artist'  'String Tribute Players'
                                     'text_people'  ''
                                         'release'  'Opeth String Tribute'
                                           'title'  'Hope Leaves'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'all', 'symphonic', 'opeth cover', 'covers']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  '10'
                                            'date'  '2008'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '139.8'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Opeth String Tribute'
'TBPM' (BPM (beats per minute))                     '139.8'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '2008'
'TIT2' (Title/songname/content description)         'Hope Leaves'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'String Tribute Players'
'TRCK' (Track number/Position in set)               '10/10'
'TSSE' (Software/Hardware and settings used for encoding)  'Audiograbber 1.83.01, Lame Dll 3.97, 192 Kbit/s, Dual Stereo, High Quality'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['instrumental', 'all', 'symphonic', 'opeth cover', 'covers']
'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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.74 dB'
'TXXX:replaygain_track_peak'                        '0.402695'

========================== row from database ==========================
                                              'id'  265609
                                            'path'  /data/Music/Bulk/00instruments-classical/The String Quartet Tribute to Opeth (2008)/10.Hope Leaves.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  207
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  4989732
                                           'mtime'  1620561805
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical The Quartet to (2008) 10.Hope prerock classical or classical instruments
                                      'tag_artist'  String Tribute Players
                                     'tag_release'  Opeth String Tribute
                                       'tag_title'  Hope Leaves
                                             'bpm'  139.8
                                    'search_title'  'hope':1 'leaves':2
                                   'search_artist'  'players':3 'string':1 'tribute':2
                                  'search_release'  'opeth':1 'string':2 'tribute':3
                                     'search_rest'  '00instruments':1 '10':8 '10hope':10 '2008':6,7 'classical':2 'hope':9 'instruments':13 'or':12 'prerock':11 'quartet':4 'the':3 'to':5
                                    'search_combo'  '00instruments':9 '10':16 '10hope':18 '2008':14,15 'classical':10 'hope':1A,17 'instruments':21 'leaves':2A 'opeth':6C 'or':20 'players':5B 'prerock':19 'quartet':12 'string':3B,7C 'the':11 'to':13 'tribute':4B,8C
                                    'tag_tracknum'  10
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['instrumental', 'all', 'symphonic', 'opeth cover', 'covers']
                                        'tag_date'  2008
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561804.7512524  (2021-05-09 14:03:24)
                             'size'  4989732