======================== unified (from filesystem) ========================
                                         'bitrate'  '165.206'
                                        'duration'  '149'
                                          'artist'  'The Meantraitors'
                                     'text_people'  ''
                                         'release'  'Angry Heart'
                                           'title'  'King Sorrow'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-OLDST-2', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-1', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['russian', 'psychobilly', 'punk', 'rockabilly']"
                                     'discogstags'  "['psychobilly', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '16'
                                      'tracktotal'  ''
                                            'date'  '1995'
                                        'comments'  ''
                                           'genre'  'rock-rockabilly or psychobilly'
                                             'bpm'  '105.753'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Angry Heart'
'TBPM' (BPM (beats per minute))                     '105.753'
'TCON' (Content type, a.k.a. Genre)                 'rock-rockabilly or psychobilly'
'TDRC' (Recording time)                             '1995'
'TIT2' (Title/songname/content description)         'King Sorrow'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Meantraitors'
'TRCK' (Track number/Position in set)               '16'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['psychobilly', 'rock']
'TXXX:lastfmtags'                                   ['russian', 'psychobilly', 'punk', 'rockabilly']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'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'                        '-0.98 dB'
'TXXX:replaygain_track_peak'                        '0.413178'

========================== row from database ==========================
                                              'id'  1350692
                                            'path'  /data/Music/Bulk/00poprockelectronic/musica/Meantraitors/1995 - angry heart/16 - King Sorrow.mp3
                                         'working'  None
                                         'bitrate'  165
                                    'duration_sec'  149
                                           'genre'  rock-rockabilly or psychobilly
                                        'filesize'  3083356
                                           'mtime'  1620526573
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic musica 1995 angry heart 16 rock rockabilly psychobilly
                                      'tag_artist'  The Meantraitors
                                     'tag_release'  Angry Heart
                                       'tag_title'  King Sorrow
                                             'bpm'  105.753
                                    'search_title'  'king':1 'sorrow':2
                                   'search_artist'  'meantraitors':2 'the':1
                                  'search_release'  'angry':1 'heart':2
                                     'search_rest'  '00poprockelectronic':1 '1995':3 'angry':4 'heart':5 'musica':2 'psychobilly':8 'rock':6 'rockabilly':7
                                    'search_combo'  '00poprockelectronic':7 '1995':9 'angry':5C,10 'heart':6C,11 'king':1A 'meantraitors':4B 'musica':8 'psychobilly':14 'rock':12 'rockabilly':13 'sorrow':2A 'the':3B
                                    'tag_tracknum'  16
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['russian', 'psychobilly', 'punk', 'rockabilly']
                                        'tag_date'  1995
                                     'discogstags'  ['psychobilly', 'rock']

============================== file details ==============================
                                           'mtime'  1620526572.9824858  (2021-05-09 04:16:12)
                             'size'  3083356