======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '306'
                                          'artist'  'Leonard Cohen'
                                     'text_people'  ''
                                         'release'  'Songs of Leonard Cohen'
                                           'title'  'The Stranger Song'
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-OLDST-3', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['blues', 'canadian', 'rock', 'folk', 'singer songwriter']"
                                     'discogstags'  "['rock', 'folk, world, & country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  '10'
                                            'date'  '2001'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter'
                                             'bpm'  '95'
                                             'key'  '4A'
                                        'acoustid'  '7f362f7d-8579-49bc-a48b-27ecf5568d97'
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Songs of Leonard Cohen'
'TBPM' (BPM (beats per minute))                     '95'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter'
'TDOR' (Original release time)                      '1967'
'TDRC' (Recording time)                             '2001'
'TIT2' (Title/songname/content description)         'The Stranger Song'
'TKEY' (Initial key)                                '4A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Leonard Cohen'
'TPE2' (Band/orchestra/accompaniment)               'Leonard Cohen'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Columbia/Sony Music Media'
'TRCK' (Track number/Position in set)               '4/10'
'TSO2'                                              'Cohen, Leonard'
'TSOP' (Performer sort order)                       'Cohen, Leonard'
'TSRC' (ISRC (international standard recording code))  'USSM10013404'
'TXXX:Acoustid Id'                                  '7f362f7d-8579-49bc-a48b-27ecf5568d97'
'TXXX:Artists'                                      'Leonard Cohen'
'TXXX:BARCODE'                                      '5099750513620'
'TXXX:CATALOGNUMBER'                                '505136 2/SMM 505136 2'
'TXXX:MusicBrainz Album Artist Id'                  '65314b12-0e08-43fa-ba33-baaa7b874c15'
'TXXX:MusicBrainz Album Id'                         '3f17746e-695f-4aa9-a85f-5be3bbf95fbc'
'TXXX:MusicBrainz Album Release Country'            'XE'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '65314b12-0e08-43fa-ba33-baaa7b874c15'
'TXXX:MusicBrainz Release Group Id'                 '34291a49-8df9-304e-bd39-16b11d829d5f'
'TXXX:MusicBrainz Release Track Id'                 'be19e654-cb89-49fd-bb19-12c9f029b7a0'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['rock', 'folk, world, & country']
'TXXX:lastfmtags'                                   ['blues', 'canadian', 'rock', 'folk', 'singer songwriter']
'TXXX:originalyear'                                 '1967'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '1'
'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'                        '+1.14 dB'
'TXXX:replaygain_track_peak'                        '0.625058'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'44fae494-0cc6-4a03-92f6-3cd89b94eb25')

========================== row from database ==========================
                                              'id'  198733
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Leonard Cohen/Songs Of Leonard Cohen/MBZ;#Leonard Cohen;#Songs of Leonard Cohen;#04;#The Stranger Song.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  306
                                           'genre'  ifs-songwriter
                                        'filesize'  6131936
                                           'mtime'  1622658723
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos Of MBZ;#Leonard Cohen;#Songs Cohen;#04;#The ifs songwriter
                                      'tag_artist'  Leonard Cohen
                                     'tag_release'  Songs of Leonard Cohen
                                       'tag_title'  The Stranger Song
                                             'bpm'  95.0
                                    'search_title'  'song':3 'stranger':2 'the':1
                                   'search_artist'  'cohen':2 'leonard':1
                                  'search_release'  'cohen':4 'leonard':3 'of':2 'songs':1
                                     'search_rest'  '00singer':1 '04':14,17 'cohen':9,11,13,16 'eos':3 'ifs':19 'leonard':6,8 'mbz':5,7 'of':4 'songs':10,12 'songwriter':2 'the':15,18
                                    'search_combo'  '00singer':10 '04':23,26 'cohen':5B,9C,18,20,22,25 'eos':12 'ifs':28 'leonard':4B,8C,15,17 'mbz':14,16 'of':7C,13 'song':3A 'songs':6C,19,21 'songwriter':11 'stranger':2A 'the':1A,24,27
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['blues', 'canadian', 'rock', 'folk', 'singer songwriter']
                                        'tag_date'  2001
                                     'discogstags'  ['rock', 'folk, world, & country']

============================== file details ==============================
                                           'mtime'  1622658722.879739  (2021-06-02 20:32:02)
                             'size'  6131936