======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '142'
                                          'artist'  'Estampie'
                                     'text_people'  ''
                                         'release'  'A Chantar'
                                           'title'  'Los Frouw Und Hör'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-OLDST-1', 'Q-LOCALNESS-2', 'Q-JZFKS-1', "
 "'Q-HHRNBTT-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['medieval', 'mittelalter', 'medieval folk', 'german', 'ethereal', 'folk']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  '14'
                                            'date'  '1990'
                                        'comments'  ''
                                           'genre'  'ifs-folk-classical'
                                             'bpm'  '145.4'
                                             'key'  '9B'
                                        'acoustid'  '2d667491-7fec-491d-afa2-22d580bc8f3e'
rest: ''

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

'TALB' (Album/Movie/Show title)                     'A Chantar'
'TBPM' (BPM (beats per minute))                     '145.4'
'TCON' (Content type, a.k.a. Genre)                 'ifs-folk-classical'
'TDOR' (Original release time)                      '1990'
'TDRC' (Recording time)                             '1990'
'TIT2' (Title/songname/content description)         'Los Frouw Und Hör'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Estampie'
'TPE2' (Band/orchestra/accompaniment)               'Estampie'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '4/14'
'TSO2'                                              'Estampie'
'TSOP' (Performer sort order)                       'Estampie'
'TXXX:Acoustid Id'                                  '2d667491-7fec-491d-afa2-22d580bc8f3e'
'TXXX:MusicBrainz Album Artist Id'                  'b4534df7-18e3-4035-93a5-473b72efc19f'
'TXXX:MusicBrainz Album Id'                         'e04c03c9-7f44-4b9a-a0a2-c5dbab1773c5'
'TXXX:MusicBrainz Album Release Country'            'DE'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        'b4534df7-18e3-4035-93a5-473b72efc19f'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   ['medieval', 'mittelalter', 'medieval folk', 'german', 'ethereal', 'folk']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-3.96 dB'
'TXXX:replaygain_track_peak'                        '1.804524'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'ae582e3b-7211-450b-9e08-27b89403f37b')

========================== row from database ==========================
                                              'id'  359850
                                            'path'  /data/Music/Bulk/00instruments-classical/Estampie/1990 - A Chantar/04. Los Frouw Und Hor.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  142
                                           'genre'  ifs-folk-classical
                                        'filesize'  5711816
                                           'mtime'  1620563222
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical 1990 04. Hor ifs folk classical
                                      'tag_artist'  Estampie
                                     'tag_release'  A Chantar
                                       'tag_title'  Los Frouw Und Hör
                                             'bpm'  145.4
                                    'search_title'  'frouw':2 'hor':4,5 'los':1 'und':3
                                   'search_artist'  'estampie':1
                                  'search_release'  'a':1 'chantar':2
                                     'search_rest'  '00instruments':1 '04':4,5 '1990':3 'classical':2 'folk':8 'hor':6 'ifs':7
                                    'search_combo'  '00instruments':9 '04':12,13 '1990':11 'a':7C 'chantar':8C 'classical':10 'estampie':6B 'folk':16 'frouw':2A 'hor':4A,5A,14 'ifs':15 'los':1A 'und':3A
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['medieval', 'mittelalter', 'medieval folk', 'german', 'ethereal', 'folk']
                                        'tag_date'  1990
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620563221.6042972  (2021-05-09 14:27:01)
                             'size'  5711816