======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '190'
                                          'artist'  'Messer Chups'
                                     'text_people'  ''
                                         'release'  'The Best of Messer Chups: Cocktail Draculina'
                                           'title'  'Difficult Love'
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 "'q-chart-2', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['surf', 'russian', 'psychobilly', 'electronic', 'experimental']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  '18'
                                            'date'  '2002'
                                        'comments'  ''
                                           'genre'  'rock-rockabilly or psychobilly'
                                             'bpm'  '117.195'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Best of Messer Chups: Cocktail Draculina'
'TBPM' (BPM (beats per minute))                     '117.195'
'TCON' (Content type, a.k.a. Genre)                 'rock-rockabilly or psychobilly'
'TDOR' (Original release time)                      '2002'
'TDRC' (Recording time)                             '2002'
'TIT2' (Title/songname/content description)         'Difficult Love'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Messer Chups'
'TPE2' (Band/orchestra/accompaniment)               'Messer Chups'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '1/18'
'TSO2'                                              'Messer Chups'
'TSOP' (Performer sort order)                       'Messer Chups'
'TXXX:MusicBrainz Album Artist Id'                  '050c59c3-12d7-4d7e-b890-9ebcf0caa85d'
'TXXX:MusicBrainz Album Id'                         'acf215d0-7dbc-4af9-96ee-c5b54e0d8e5c'
'TXXX:MusicBrainz Album Release Country'            'RU'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'compilation'
'TXXX:MusicBrainz Artist Id'                        '050c59c3-12d7-4d7e-b890-9ebcf0caa85d'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   ['surf', 'russian', 'psychobilly', 'electronic', 'experimental']
'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'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.69 dB'
'TXXX:replaygain_track_peak'                        '0.290450'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'96b1eae6-fdc3-4d00-b38a-cbc183845f89')

========================== row from database ==========================
                                              'id'  141758
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Messer Chups/2002 - The Best Cocktail Draculina (160kbps)/01 - Difficult Love (Remix).mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  190
                                           'genre'  rock-rockabilly or psychobilly
                                        'filesize'  3808820
                                           'mtime'  1620525297
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm 2002 (160kbps) 01 (Remix) rock rockabilly or psychobilly
                                      'tag_artist'  Messer Chups
                                     'tag_release'  The Best of Messer Chups: Cocktail Draculina
                                       'tag_title'  Difficult Love
                                             'bpm'  117.195
                                    'search_title'  'difficult':1 'love':2
                                   'search_artist'  'chups':2 'messer':1
                                  'search_release'  'best':2 'chups':5,6 'cocktail':7 'draculina':8 'messer':4 'of':3 'the':1
                                     'search_rest'  '160kbps':2,3 '2002':1 'or':8 'psychobilly':9 'remix':4,5 'rock':6 'rockabilly':7
                                    'search_combo'  '160kbps':14,15 '2002':13 'best':6C 'chups':4B,9C,10C 'cocktail':11C 'difficult':1A 'draculina':12C 'love':2A 'messer':3B,8C 'of':7C 'or':20 'psychobilly':21 'remix':16,17 'rock':18 'rockabilly':19 'the':5C
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['surf', 'russian', 'psychobilly', 'electronic', 'experimental']
                                        'tag_date'  2002
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620525297.2083063  (2021-05-09 03:54:57)
                             'size'  3808820