======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '182'
                                          'artist'  'Leningrad Cowboys'
                                     'text_people'  ''
                                         'release'  'Leningrad Cowboys Go America'
                                           'title'  'Sunday Morning'
                                           'quals'  ("['Q-UNU-1', 'Q-JZFKS-1', 'Q-OLDST-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', 'Q-PIANO-3', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-vocals-1', 'q-mixbeat-2']")
                                      'lastfmtags'  "['cover', 'alternative', 'polka', 'finnish', 'rock']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  ''
                                            'date'  '1990'
                                        'comments'  ''
                                           'genre'  'rock-pop'
                                             'bpm'  '144.233'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Leningrad Cowboys Go America'
'TBPM' (BPM (beats per minute))                     '144.233'
'TCON' (Content type, a.k.a. Genre)                 'rock-pop'
'TDRC' (Recording time)                             '1990'
'TIT2' (Title/songname/content description)         'Sunday Morning'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Leningrad Cowboys'
'TRCK' (Track number/Position in set)               '5'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['cover', 'alternative', 'polka', 'finnish', 'rock']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '4'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.61 dB'
'TXXX:replaygain_track_peak'                        '0.662856'

========================== row from database ==========================
                                              'id'  1314777
                                            'path'  /data/Music/Bulk/00poprockelectronic-poprock-indierock/1989 - Leningrad Cowboys Go America/05 - Sunday Morning.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  182
                                           'genre'  rock-pop
                                        'filesize'  4392100
                                           'mtime'  1620388705
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic poprock indierock 1989 05 rock pop
                                      'tag_artist'  Leningrad Cowboys
                                     'tag_release'  Leningrad Cowboys Go America
                                       'tag_title'  Sunday Morning
                                             'bpm'  144.233
                                    'search_title'  'morning':2 'sunday':1
                                   'search_artist'  'cowboys':2 'leningrad':1
                                  'search_release'  'america':4 'cowboys':2 'go':3 'leningrad':1
                                     'search_rest'  '00poprockelectronic':1 '1989':4 'indierock':3 'pop':6 'poprock':2 'rock':5
                                    'search_combo'  '00poprockelectronic':9 '1989':12 'america':8C 'cowboys':4B,6C 'go':7C 'indierock':11 'leningrad':3B,5C 'morning':2A 'pop':14 'poprock':10 'rock':13 'sunday':1A
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-2', 'Q-PIANO-3', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-4', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['cover', 'alternative', 'polka', 'finnish', 'rock']
                                        'tag_date'  1990
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620388705.0930116  (2021-05-07 13:58:25)
                             'size'  4392100