======================== unified (from filesystem) ========================
                                         'bitrate'  '112.0'
                                        'duration'  '254'
                                          'artist'  'Bad News'
                                     'text_people'  ''
                                         'release'  'The Cash in Compilation'
                                           'title'  'Bohemian Rhapsody'
                                           'quals'  ("['Q-HAP-1', 'Q-UNU-2', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-4', "
 "'q-play-2', 'Q-JZFKS-1', 'Q-OLDST-3', 'q-chart-2', 'q-drums-3', 'q-other-3', "
 "'q-piano-1', 'q-vocals-4', 'Q-HHRNBTT-1', 'q-mixbeat-1', 'Q-LOCALNESS-1']")
                                      'lastfmtags'  '[\'comedy\', \'heavy metal\', \'noise\', \'all\', "80\'s"]'
                                     'discogstags'  "['hardcore', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  '13'
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'eid-metal'
                                             'bpm'  '143.721'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            'Swedish'
'COMM:Songs-DB_Custom2:eng'                         'Covers'
'COMM:Songs-DB_Custom3:eng'                         'Swedish'
'POPM:Windows Media Player 9 Series'                POPM(email='Windows Media Player 9 Series', rating=128, count=0)
'TALB' (Album/Movie/Show title)                     'The Cash in Compilation'
'TBPM' (BPM (beats per minute))                     '143.721'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal'
'TIT2' (Title/songname/content description)         'Bohemian Rhapsody'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Bad News'
'TPE2' (Band/orchestra/accompaniment)               'Bad News'
'TRCK' (Track number/Position in set)               '5/13'
'TSOP' (Performer sort order)                       'Bad News'
'TXXX:ALBUMARTISTSORT'                              'Bad News'
'TXXX:FMPS_Rating'                                  '0.4'
'TXXX:MP3GAIN_MINMAX'                               '130,189'
'TXXX:MusicBrainz Album Artist Id'                  '9dec8cb1-0b16-43d5-b7f1-b9e24997a240'
'TXXX:MusicBrainz Album Id'                         '505f8125-2de5-4561-b41e-caaa33c7fc07'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '9dec8cb1-0b16-43d5-b7f1-b9e24997a240'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  ['hardcore', 'rock']
'TXXX:lastfmtags'                                   ['comedy', 'heavy metal', 'noise', 'all', "80's"]
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.01 dB'
'TXXX:replaygain_track_peak'                        '0.560720'

========================== row from database ==========================
                                              'id'  1323437
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/Bad News__The Cash in Compilation__05 - Bohemian Rhapsody.mp3
                                         'working'  None
                                         'bitrate'  112
                                    'duration_sec'  254
                                           'genre'  eid-metal
                                        'filesize'  3565894
                                           'mtime'  1620301833
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] News__The Compilation__05 eid metal
                                      'tag_artist'  Bad News
                                     'tag_release'  The Cash in Compilation
                                       'tag_title'  Bohemian Rhapsody
                                             'bpm'  143.721
                                    'search_title'  'bohemian':1 'rhapsody':2
                                   'search_artist'  'bad':1 'news':2
                                  'search_release'  'cash':2 'compilation':4 'in':3 'the':1
                                     'search_rest'  '00poprockelectronic':1 '05':10 'compilation':9 'eid':11 'files':5,6 'loose':3,4 'metal':12 'news':7 'the':8 'unsorted':2
                                    'search_combo'  '00poprockelectronic':9 '05':18 'bad':3B 'bohemian':1A 'cash':6C 'compilation':8C,17 'eid':19 'files':13,14 'in':7C 'loose':11,12 'metal':20 'news':4B,15 'rhapsody':2A 'the':5C,16 'unsorted':10
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', '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-1', 'q-bass-3', 'q-grit-4']
                                      'lastfmtags'  ['comedy', 'heavy metal', 'noise', 'all', "80's"]
                                        'tag_date'  
                                     'discogstags'  ['hardcore', 'rock']

============================== file details ==============================
                                           'mtime'  1620301832.514708  (2021-05-06 13:50:32)
                             'size'  3565894