======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '58'
                                          'artist'  '[unknown]'
                                     'text_people'  ''
                                         'release'  'Music! The Berlin Phonogramm-Archiv 1900-2000'
                                           'title'  'Caravan Song (Tunisia, 1929)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-OLDST-1', 'Q-UNU-2', 'Q-LOCALNESS-3', "
 "'Q-HHRNBTT-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '20'
                                      'tracktotal'  '42'
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'loc-unsorted'
                                             'bpm'  '145.685'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Music! The Berlin Phonogramm-Archiv 1900-2000'
'TBPM' (BPM (beats per minute))                     '145.685'
'TCMP'                                              '1'
'TCON' (Content type, a.k.a. Genre)                 'loc-unsorted'
'TDOR' (Original release time)                      '2000'
'TDRC' (Recording time)                             '2000-06-11'
'TIT2' (Title/songname/content description)         'Caravan Song (Tunisia, 1929)'
'TKEY' (Initial key)                                '3A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               '[unknown]'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/4'
'TPUB' (Publisher)                                  'WERGO'
'TRCK' (Track number/Position in set)               '20/42'
'TSO2'                                              'Various Artists'
'TSOP' (Performer sort order)                       '[unknown]'
'TSST' (Set subtitle)                               'Wax Cylinder Recordings 1893-1954'
'TXXX:ASIN'                                         'B00004YUCI'
'TXXX:Artists'                                      '[unknown]'
'TXXX:BARCODE'                                      '4010228170122'
'TXXX:MusicBrainz Album Artist Id'                  '89ad4ac3-39f7-470e-963a-56509c546377'
'TXXX:MusicBrainz Album Id'                         '4c4fa0e1-0593-43e8-98e7-c1a88976a4a3'
'TXXX:MusicBrainz Album Release Country'            'DE'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Artist Id'                        '125ec42a-7229-4250-afc5-e057484327fe'
'TXXX:MusicBrainz Release Group Id'                 '973c39f1-1c5e-35f6-9972-9f81ee206236'
'TXXX:MusicBrainz Release Track Id'                 '5130dc30-50b4-3280-8d8e-fec4693f140a'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:originalyear'                                 '2000'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.22 dB'
'TXXX:replaygain_track_peak'                        '0.467503'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'8c7ee30c-dc1d-46f9-a969-30c55aabca27')

========================== row from database ==========================
                                              'id'  474490
                                            'path'  /data/Music/Bulk/00localcharacter/VA. World 1： Trad/Berlin Phonogramm Archiv - Wax Cylinder Recordings (1893-1954) [192k]/20-anon_tuarag_(tunisia_1929)-caravan_song.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  58
                                           'genre'  loc-unsorted
                                        'filesize'  1473861
                                           'mtime'  1621629862
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter VA. World 1： Trad Wax Cylinder Recordings (1893 1954) [192k] anon_tuarag_(tunisia_1929) caravan_song loc unsorted
                                      'tag_artist'  [unknown]
                                     'tag_release'  Music! The Berlin Phonogramm-Archiv 1900-2000
                                       'tag_title'  Caravan Song (Tunisia, 1929)
                                             'bpm'  145.685
                                    'search_title'  '1929':5,6 'caravan':1 'song':2 'tunisia':3,4
                                   'search_artist'  'unknown':1,2
                                  'search_release'  '1900':7 '19002000':9 '2000':8 'archiv':5 'berlin':3 'music':1 'phonogramm':4 'phonogrammarchiv':6 'the':2
                                     'search_rest'  '1':4,5,6 '1893':11,12 '1929':20,24 '192k':15,16 '1954':13,14 'anon':17,21 'caravan':25 'cylinder':9 'loc':27 'recordings':10 'song':26 'trad':7 'tuarag':18,22 'tunisia':19,23 'unsorted':28 'va':1,2 'wax':8 'world':3
                                    'search_combo'  '1':21,22,23 '1893':28,29 '1900':15C '19002000':17C '1929':5A,6A,37,41 '192k':32,33 '1954':30,31 '2000':16C 'anon':34,38 'archiv':13C 'berlin':11C 'caravan':1A,42 'cylinder':26 'loc':44 'music':9C 'phonogramm':12C 'phonogrammarchiv':14C 'recordings':27 'song':2A,43 'the':10C 'trad':24 'tuarag':35,39 'tunisia':3A,4A,36,40 'unknown':7B,8B 'unsorted':45 'va':18,19 'wax':25 'world':20
                                    'tag_tracknum'  20
                                      'num_images'  1
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['mysterious', 'unknown', 'all', 'mistagged artist', 'rock']
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621629862.3700564  (2021-05-21 22:44:22)
                             'size'  1473861