======================== unified (from filesystem) ========================
                                         'bitrate'  '194.616'
                                        'duration'  '630'
                                          'artist'  'Antonio Vivaldi'
                                     'text_people'  ''
                                         'release'  '100 Masterpieces, Volume 1: The Top 10 of Classical Music 1685-1730'
                                           'title'  'The Four Seasons - Spring'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'composers', 'baroque', 'classical', 'classic']"
                                     'discogstags'  "['classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  '10'
                                            'date'  '1991'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '95'
                                             'key'  '12B'
                                        'acoustid'  '884c7ee4-5818-46d0-a0a0-638ae60b9330'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     '100 Masterpieces, Volume 1: The Top 10 of Classical Music 1685-1730'
'TBPM' (BPM (beats per minute))                     '95'
'TCMP'                                              '1'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDOR' (Original release time)                      '1991'
'TDRC' (Recording time)                             '1991-03-19'
'TENC' (Encoded by)                                 'Exact Audio Copy   (Burst mode)'
'TIT2' (Title/songname/content description)         'The Four Seasons - Spring'
'TKEY' (Initial key)                                '12B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Antonio Vivaldi'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'LaserLight Digital'
'TRCK' (Track number/Position in set)               '7/10'
'TSO2'                                              'Various Artists'
'TSOP' (Performer sort order)                       'Vivaldi, Antonio'
'TXXX:Acoustid Id'                                  '884c7ee4-5818-46d0-a0a0-638ae60b9330'
'TXXX:Artists'                                      'Antonio Vivaldi'
'TXXX:BARCODE'                                      '018111567626'
'TXXX:CATALOGNUMBER'                                '15 676'
'TXXX:MusicBrainz Album Artist Id'                  '89ad4ac3-39f7-470e-963a-56509c546377'
'TXXX:MusicBrainz Album Id'                         '1595b2ea-18de-4040-b308-c43c9e603c87'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album/compilation'
'TXXX:MusicBrainz Artist Id'                        'ad79836d-9849-44df-8789-180bbc823f3c'
'TXXX:MusicBrainz Release Group Id'                 'b23c3e7f-3365-41ae-92d9-85966b518f60'
'TXXX:MusicBrainz Release Track Id'                 '9130fed3-1831-3811-916d-58c7e3af14c0'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  'classical'
'TXXX:lastfmtags'                                   ['instrumental', 'composers', 'baroque', 'classical', 'classic']
'TXXX:originalyear'                                 '1991'
'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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+3.09 dB'
'TXXX:replaygain_track_peak'                        '0.847383'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'd41bf9cd-7d2d-43bb-89fb-69eed45623a7')

========================== row from database ==========================
                                              'id'  1213964
                                            'path'  /data/Music/Bulk/00instruments-classical/The Top 100 Masterpieces of Classical Music 1685-1928/Disc 1 - 1685-1730/07 - 1725 Vivaldi , The Four Seasons - Spring.mp3
                                         'working'  None
                                         'bitrate'  194
                                    'duration_sec'  630
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  15444822
                                           'mtime'  1620561811
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical 1928 Disc 07 1725 prerock classical or classical instruments
                                      'tag_artist'  Antonio Vivaldi
                                     'tag_release'  100 Masterpieces, Volume 1: The Top 10 of Classical Music 1685-1730
                                       'tag_title'  The Four Seasons - Spring
                                             'bpm'  95.0
                                    'search_title'  'four':2 'seasons':3 'spring':4 'the':1
                                   'search_artist'  'antonio':1 'vivaldi':2
                                  'search_release'  '1':5,6 '100':1 '1685':12 '16851730':14 '1730':13 'classical':10 'masterpieces':2,3 'music':11 'of':9 'the':7 'top':8 'volume':4
                                     'search_rest'  '00instruments':1 '1725':5 '1928':3 'classical':2 'disc':4 'instruments':8 'or':7 'prerock':6
                                    'search_combo'  '00instruments':21 '1':11C,12C '100':7C '1685':18C '16851730':20C '1725':25 '1730':19C '1928':23 'antonio':5B 'classical':16C,22 'disc':24 'four':2A 'instruments':28 'masterpieces':8C,9C 'music':17C 'of':15C 'or':27 'prerock':26 'seasons':3A 'spring':4A 'the':1A,13C 'top':14C 'vivaldi':6B 'volume':10C
                                    'tag_tracknum'  7
                                      'num_images'  1
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['instrumental', 'composers', 'baroque', 'classical', 'classic']
                                        'tag_date'  1991
                                     'discogstags'  ['classical']

============================== file details ==============================
                                           'mtime'  1620561810.877685  (2021-05-09 14:03:30)
                             'size'  15444822