======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '299'
                                          'artist'  'Gregorian'
                                     'text_people'  ''
                                         'release'  'Masters of Chant'
                                           'title'  "Still I'm Sad"
                                           'quals'  ("['Q-HAP-3', 'Q-OLDST-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-3', 'q-syn-2', 'q-bass-2', 'q-busy-1', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['new age', 'choir', 'celtic', 'ambient']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '2007'
                                        'comments'  ''
                                           'genre'  'set-th-novelty;loc-eur;set-cover or covered'
                                             'bpm'  '102'
                                             'key'  '6B'
                                        'acoustid'  '69621988-260e-4d10-9715-b19ad834a23b'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Masters of Chant'
'TBPM' (BPM (beats per minute))                     '102'
'TCON' (Content type, a.k.a. Genre)                 ['set-th-novelty', 'loc-eur', 'set-cover or covered']
'TDOR' (Original release time)                      '2007'
'TDRC' (Recording time)                             '2007-09-28'
'TIPL' (Involved people list)                       TIPL(encoding=<Encoding.UTF16: 1>, people=[['', '']])
'TIT2' (Title/songname/content description)         "Still I'm Sad"
'TKEY' (Initial key)                                '6B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Gregorian'
'TPE2' (Band/orchestra/accompaniment)               'Gregorian'
'TPOS' (Part of a set)                              '1/5'
'TPUB' (Publisher)                                  'earBOOKS'
'TRCK' (Track number/Position in set)               '4'
'TSO2'                                              'Gregorian'
'TSOP' (Performer sort order)                       'Gregorian'
'TSRC' (ISRC (international standard recording code))  'DEH820000018'
'TSST' (Set subtitle)                               'Masters of Chant Chapter I'
'TXXX:ASIN'                                         '3940004049'
'TXXX:Acoustid Id'                                  '69621988-260e-4d10-9715-b19ad834a23b'
'TXXX:Artists'                                      'Gregorian'
'TXXX:BARCODE'                                      '9783940004048'
'TXXX:CATALOGNUMBER'                                '9783940004048'
'TXXX:MusicBrainz Album Artist Id'                  '18a0d72d-0be0-4196-a340-035163bfae1c'
'TXXX:MusicBrainz Album Id'                         '62fba537-e5c7-4014-b539-c7561763edd0'
'TXXX:MusicBrainz Album Release Country'            'DE'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album/compilation'
'TXXX:MusicBrainz Artist Id'                        '18a0d72d-0be0-4196-a340-035163bfae1c'
'TXXX:MusicBrainz Release Group Id'                 'bc459e2f-fdec-41df-8afa-f787c9108303'
'TXXX:MusicBrainz Release Track Id'                 '53a3db71-0e4f-4764-806b-945ee5f53aa4'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   ['new age', 'choir', 'celtic', 'ambient']
'TXXX:originalyear'                                 '2007'
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '1'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-0.07 dB'
'TXXX:replaygain_track_peak'                        '0.590363'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'41ed80ec-d1cd-4a4e-a7ad-e234d780eb89')

========================== row from database ==========================
                                              'id'  923410
                                            'path'  /data/Music/Bulk/00localcharacter/00mid-north-europe/Gregorian/04  Gregorian - Still I_m Sad.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  299
                                           'genre'  set-th-novelty;loc-eur;set-cover or covered
                                        'filesize'  7232020
                                           'mtime'  1621629512
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00mid north europe 04 I_m set th novelty;loc eur;set cover covered
                                      'tag_artist'  Gregorian
                                     'tag_release'  Masters of Chant
                                       'tag_title'  Still I'm Sad
                                             'bpm'  102.0
                                    'search_title'  'i':2 'im':4 'm':3 'sad':5 'still':1
                                   'search_artist'  'gregorian':1
                                  'search_release'  'chant':3 'masters':1 'of':2
                                     'search_rest'  '00mid':1 'cover':16 'covered':17 'eur':12,14 'europe':3 'i':4 'loc':9,11 'm':5 'north':2 'novelty':8,10 'set':6,13,15 'th':7
                                    'search_combo'  '00mid':10 'chant':9C 'cover':25 'covered':26 'eur':21,23 'europe':12 'gregorian':6B 'i':2A,13 'im':4A 'loc':18,20 'm':3A,14 'masters':7C 'north':11 'novelty':17,19 'of':8C 'sad':5A 'set':15,22,24 'still':1A 'th':16
                                    'tag_tracknum'  4
                                      'num_images'  1
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-1', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['new age', 'choir', 'celtic', 'ambient']
                                        'tag_date'  2007
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621629511.5938356  (2021-05-21 22:38:31)
                             'size'  7232020