======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '290'
                                          'artist'  'The Who'
                                     'text_people'  ''
                                         'release'  'The Ultimate Collection'
                                           'title'  '5:15'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-3', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['hard rock', 'rock', '60s', 'british', 'classic rock']"
                                     'discogstags'  "['rock', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  '17'
                                            'date'  '2002'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic'
                                             'bpm'  '126'
                                             'key'  '8B'
                                        'acoustid'  '11a25848-1617-4d04-8ddc-846e2eea9d7b'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'The Ultimate Collection'
'TBPM' (BPM (beats per minute))                     '126'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-classic'
'TDOR' (Original release time)                      '2002'
'TDRC' (Recording time)                             '2002'
'TIT2' (Title/songname/content description)         '5:15'
'TKEY' (Initial key)                                '8B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'The Who'
'TPE2' (Band/orchestra/accompaniment)               'The Who'
'TPOS' (Part of a set)                              '2/2'
'TPUB' (Publisher)                                  'Universal Music TV'
'TRCK' (Track number/Position in set)               '6/17'
'TSO2'                                              'Who, The'
'TSOP' (Performer sort order)                       'Who, The'
'TSRC' (ISRC (international standard recording code))  'GBAKW9601038/USMC17349205'
'TXXX:ASIN'                                         'B00006NSCK'
'TXXX:Acoustid Id'                                  '11a25848-1617-4d04-8ddc-846e2eea9d7b'
'TXXX:Artists'                                      'The Who'
'TXXX:BARCODE'                                      '044006523422'
'TXXX:CATALOGNUMBER'                                '065 234-2'
'TXXX:MusicBrainz Album Artist Id'                  '9fdaa16b-a6c4-4831-b87c-bc9ca8ce7eaa'
'TXXX:MusicBrainz Album Id'                         'd44d0a1a-eadf-4a00-a4c6-4e6e2e003128'
'TXXX:MusicBrainz Album Release Country'            'GB'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album/compilation'
'TXXX:MusicBrainz Artist Id'                        '9fdaa16b-a6c4-4831-b87c-bc9ca8ce7eaa'
'TXXX:MusicBrainz Release Group Id'                 '2dd77597-2fc8-3965-bef0-e4bf5500012d'
'TXXX:MusicBrainz Release Track Id'                 'b024a00f-e0e6-329f-99be-02a80ab17f6a'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['rock', 'classic rock']
'TXXX:lastfmtags'                                   ['hard rock', 'rock', '60s', 'british', 'classic rock']
'TXXX:originalyear'                                 '2002'
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.11 dB'
'TXXX:replaygain_track_peak'                        '0.410705'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'271ec2b9-65b3-4f82-a69b-295629748620')

========================== row from database ==========================
                                              'id'  1515951
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/The Who/The Ultimate Collection/08 - 5_15.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  290
                                           'genre'  rock-cppex-classic
                                        'filesize'  7037129
                                           'mtime'  1636038979
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy 08 5_15 rock cppex classic
                                      'tag_artist'  The Who
                                     'tag_release'  The Ultimate Collection
                                       'tag_title'  5:15
                                             'bpm'  126.0
                                    'search_title'  '15':2 '5':1 '515':3
                                   'search_artist'  'the':1 'who':2
                                  'search_release'  'collection':3 'the':1 'ultimate':2
                                     'search_rest'  '15':3 '5':2 'classic':6 'classicprogpsy':1 'cppex':5 'rock':4
                                    'search_combo'  '15':2A,11 '5':1A,10 '515':3A 'classic':14 'classicprogpsy':9 'collection':8C 'cppex':13 'rock':12 'the':4B,6C 'ultimate':7C 'who':5B
                                    'tag_tracknum'  6
                                      'num_images'  1
                                             'key'  8B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['hard rock', 'rock', '60s', 'british', 'classic rock']
                                        'tag_date'  2002
                                     'discogstags'  ['rock', 'classic rock']

============================== file details ==============================
                                           'mtime'  1636038979.1215377  (2021-11-04 16:16:19)
                             'size'  7037129