======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '232'
                                          'artist'  'Buckingham Nicks'
                                     'text_people'  ''
                                         'release'  'Buckingham Nicks'
                                           'title'  "Don't Let Me Down Again"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['classic rock', 'folk rock', 'rock', 'christine mcvie', 'fleetwood mac']"
                                     'discogstags'  "['rock', 'pop rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  '10'
                                            'date'  '1973'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic;set-pl-sced'
                                             'bpm'  '114'
                                             'key'  '11B'
                                        'acoustid'  'b90441ad-e714-4da6-ae03-346e2e8d75a5'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Buckingham Nicks'
'TBPM' (BPM (beats per minute))                     '114'
'TCON' (Content type, a.k.a. Genre)                 ['rock-cppex-classic', 'set-pl-sced']
'TDOR' (Original release time)                      '1973'
'TDRC' (Recording time)                             '1973-09-05'
'TIPL' (Involved people list)                       TIPL(encoding=<Encoding.UTF16: 1>, people=[['producer', 'Lee Lasseff'], ['bass guitar', 'Jerry Scheff'], ['bass guitar', 'Mark Tulin'], ['keyboard', 'Jerry Sandvic'], ['bass guitar, guitar and percussion', 'Lindsey Buckingham'], ['membranophone', 'Jim Keltner'], ['membranophone', 'Bonnie Tutt'], ['membranophone and percussion', 'Hoppy Hodges'], ['guitar', 'Waddy Wachtel'], ['synthesizer', 'Monty Stark'], ['strings', 'Dick Halligan'], ['percussion', 'Jorge Calderón']])
'TIT2' (Title/songname/content description)         "Don't Let Me Down Again"
'TKEY' (Initial key)                                '11B'
'TLEN' (Length)                                     '232000'
'TMED' (Media type)                                 '12" Vinyl'
'TPE1' (Lead performer(s)/Soloist(s))               'Buckingham Nicks'
'TPE2' (Band/orchestra/accompaniment)               'Buckingham Nicks'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Polydor'
'TRCK' (Track number/Position in set)               '6/10'
'TSO2'                                              'Buckingham Nicks'
'TSOP' (Performer sort order)                       'Buckingham Nicks'
'TXXX:ASIN'                                         'B000HACHUO'
'TXXX:Acoustid Id'                                  'b90441ad-e714-4da6-ae03-346e2e8d75a5'
'TXXX:Artists'                                      'Buckingham Nicks'
'TXXX:CATALOGNUMBER'                                'PD 5058/PD-5058'
'TXXX:MusicBrainz Album Artist Id'                  '4b1bf05d-0e3c-44a3-9fc8-ad088fc25797'
'TXXX:MusicBrainz Album Id'                         '5e965bbc-144c-4417-8615-06180eb3a607'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '4b1bf05d-0e3c-44a3-9fc8-ad088fc25797'
'TXXX:MusicBrainz Release Group Id'                 '9dc4a7b2-61cc-318a-bc3f-cf054d0ecf8f'
'TXXX:MusicBrainz Release Track Id'                 '9feaee9d-592a-3b5c-89ee-ae34731d375b'
'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', 'pop rock']
'TXXX:lastfmtags'                                   ['classic rock', 'folk rock', 'rock', 'christine mcvie', 'fleetwood mac']
'TXXX:originalyear'                                 '1973'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.30 dB'
'TXXX:replaygain_track_peak'                        '0.690440'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'e672069a-3b96-478b-a7ac-bd63d6dd4542')

========================== row from database ==========================
                                              'id'  1512669
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/Buckingham Nicks/[1973] Buckingham Nicks/06 Don_t Let Me Down Again.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  232
                                           'genre'  rock-cppex-classic;set-pl-sced
                                        'filesize'  7510302
                                           'mtime'  1636038689
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy [1973] 06 Don_t rock cppex classic;set pl sced
                                      'tag_artist'  Buckingham Nicks
                                     'tag_release'  Buckingham Nicks
                                       'tag_title'  Don't Let Me Down Again
                                             'bpm'  114.0
                                    'search_title'  'again':7 'don':1 'dont':3 'down':6 'let':4 'me':5 't':2
                                   'search_artist'  'buckingham':1 'nicks':2
                                  'search_release'  'buckingham':1 'nicks':2
                                     'search_rest'  '1973':2,3 'classic':8,10 'classicprogpsy':1 'cppex':7 'don':4 'pl':12 'rock':6 'sced':13 'set':9,11 't':5
                                    'search_combo'  '1973':13,14 'again':7A 'buckingham':8B,10C 'classic':19,21 'classicprogpsy':12 'cppex':18 'don':1A,15 'dont':3A 'down':6A 'let':4A 'me':5A 'nicks':9B,11C 'pl':23 'rock':17 'sced':24 'set':20,22 't':2A,16
                                    'tag_tracknum'  6
                                      'num_images'  1
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['classic rock', 'folk rock', 'rock', 'christine mcvie', 'fleetwood mac']
                                        'tag_date'  1973
                                     'discogstags'  ['rock', 'pop rock']

============================== file details ==============================
                                           'mtime'  1636038688.6726885  (2021-11-04 16:11:28)
                             'size'  7510302