======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '415'
                                          'artist'  'Metallica'
                                     'text_people'  ''
                                         'release'  "Kill 'em All"
                                           'title'  'Seek & Destroy'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-3', 'q-play-2', "
 "'q-chart-4', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['hard rock', 'rock', 'thrash metal', 'metal', 'heavy metal']"
                                     'discogstags'  "['thrash', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '9'
                                      'tracktotal'  '10'
                                            'date'  '1989'
                                        'comments'  ''
                                           'genre'  'eid-metal-heavy'
                                             'bpm'  '142'
                                             'key'  '3A'
                                        'acoustid'  '793dc980-b5cc-4bbe-8e9d-92a8d0682f18'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     "Kill 'em All"
'TBPM' (BPM (beats per minute))                     '142'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-heavy'
'TDOR' (Original release time)                      '1983'
'TDRC' (Recording time)                             '1989'
'TENC' (Encoded by)                                 'MP3Producer by MP3Developments.com'
'TIT2' (Title/songname/content description)         'Seek & Destroy'
'TKEY' (Initial key)                                '3A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Metallica'
'TPE2' (Band/orchestra/accompaniment)               'Metallica'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Vertigo'
'TRCK' (Track number/Position in set)               '9/10'
'TSO2'                                              'Metallica'
'TSOP' (Performer sort order)                       'Metallica'
'TSRC' (ISRC (international standard recording code))  'GBAMC8300009/QMKHM1600034'
'TXXX:Acoustid Id'                                  '793dc980-b5cc-4bbe-8e9d-92a8d0682f18'
'TXXX:Artists'                                      'Metallica'
'TXXX:BARCODE'                                      '042283814226'
'TXXX:CATALOGNUMBER'                                '838 142-2'
'TXXX:MusicBrainz Album Artist Id'                  '65f4f0c5-ef9e-490c-aee3-909e7ae6b2ab'
'TXXX:MusicBrainz Album Id'                         'abcc9a0c-169f-4c60-8322-4b3922fd3a5e'
'TXXX:MusicBrainz Album Release Country'            'CO'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '65f4f0c5-ef9e-490c-aee3-909e7ae6b2ab'
'TXXX:MusicBrainz Release Group Id'                 'f44f4f73-a714-31a1-a4b8-bfcaaf311f50'
'TXXX:MusicBrainz Release Track Id'                 '2be66014-af4c-3308-94a8-faae86060126'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['thrash', 'rock']
'TXXX:lastfmtags'                                   ['hard rock', 'rock', 'thrash metal', 'metal', 'heavy metal']
'TXXX:originalyear'                                 '1983'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+0.46 dB'
'TXXX:replaygain_track_peak'                        '0.371536'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'f2c2fbbd-a7a9-4cc9-840a-a527cd413528')

========================== row from database ==========================
                                              'id'  1525422
                                            'path'  /data/Music/Bulk/00poprockelectronic/Metallica/Kill_ Em All/Metallica Kill _Em All 09 Seek & Destroy.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  415
                                           'genre'  eid-metal-heavy
                                        'filesize'  13359019
                                           'mtime'  1620311090
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Kill_ Em _Em 09 eid metal heavy
                                      'tag_artist'  Metallica
                                     'tag_release'  Kill 'em All
                                       'tag_title'  Seek & Destroy
                                             'bpm'  142.0
                                    'search_title'  'destroy':2 'seek':1
                                   'search_artist'  'metallica':1
                                  'search_release'  'all':4 'em':2,3 'kill':1
                                     'search_rest'  '00poprockelectronic':1 'eid':5 'em':3,4 'heavy':7 'kill':2 'metal':6
                                    'search_combo'  '00poprockelectronic':8 'all':7C 'destroy':2A 'eid':12 'em':5C,6C,10,11 'heavy':14 'kill':4C,9 'metal':13 'metallica':3B 'seek':1A
                                    'tag_tracknum'  9
                                      'num_images'  1
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-1', 'q-bass-1', 'q-grit-3']
                                      'lastfmtags'  ['hard rock', 'rock', 'thrash metal', 'metal', 'heavy metal']
                                        'tag_date'  1989
                                     'discogstags'  ['thrash', 'rock']

============================== file details ==============================
                                           'mtime'  1620311089.5127525  (2021-05-06 16:24:49)
                             'size'  13359019