======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '237'
                                          'artist'  'John Lennon'
                                     'text_people'  ''
                                         'release'  'The John Lennon Collection'
                                           'title'  '(Just Like) Starting Over'
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 "'q-chart-4', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
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                                      'lastfmtags'  "['rock', 'singer songwriter', 'pop', 'british', 'classic rock']"
                                     'discogstags'  "['rock', 'pop', 'soft rock', 'pop rock', 'ballad']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '12'
                                      'tracktotal'  '19'
                                            'date'  '1989'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic;set-pl-billboard'
                                             'bpm'  '99'
                                             'key'  '4A'
                                        'acoustid'  '29768902-bae3-4ce3-a92c-ffb605d848fb'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'The John Lennon Collection'
'TBPM' (BPM (beats per minute))                     '99'
'TCON' (Content type, a.k.a. Genre)                 ['rock-cppex-classic', 'set-pl-billboard']
'TDOR' (Original release time)                      '1989'
'TDRC' (Recording time)                             '1989'
'TIT2' (Title/songname/content description)         '(Just Like) Starting Over'
'TKEY' (Initial key)                                '4A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'John Lennon'
'TPE2' (Band/orchestra/accompaniment)               'John Lennon'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Capitol Records'
'TRCK' (Track number/Position in set)               '12/19'
'TSO2'                                              'Lennon, John'
'TSOP' (Performer sort order)                       'Lennon, John'
'TSRC' (ISRC (international standard recording code))  'USTO10000002/USTO11000015/USTO18800002'
'TXXX:Acoustid Id'                                  '29768902-bae3-4ce3-a92c-ffb605d848fb'
'TXXX:Artists'                                      'John Lennon'
'TXXX:BARCODE'                                      '777497550331'
'TXXX:CATALOGNUMBER'                                'CDP 591516'
'TXXX:MusicBrainz Album Artist Id'                  '4d5447d7-c61c-4120-ba1b-d7f471d385b9'
'TXXX:MusicBrainz Album Id'                         '2ebccc44-ad6c-4b52-a701-dc0abc22eaa0'
'TXXX:MusicBrainz Album Release Country'            'CA'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album/compilation'
'TXXX:MusicBrainz Artist Id'                        '4d5447d7-c61c-4120-ba1b-d7f471d385b9'
'TXXX:MusicBrainz Release Group Id'                 'f733db12-dec2-38ff-8236-7163c815750e'
'TXXX:MusicBrainz Release Track Id'                 'ba1cb318-793a-4957-a5ab-d8c25955d7ec'
'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', 'soft rock', 'pop rock', 'ballad']
'TXXX:lastfmtags'                                   ['rock', 'singer songwriter', 'pop', 'british', 'classic rock']
'TXXX:originalyear'                                 '1989'
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.02 dB'
'TXXX:replaygain_track_peak'                        '0.611871'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'f3c4b489-67dc-4d85-9966-1a7af21fd674')

========================== row from database ==========================
                                              'id'  1416680
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/John Lennon - The John Lennon Collection/John Lennon - 12 - (Just Like) Starting Over.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  237
                                           'genre'  rock-cppex-classic;set-pl-billboard
                                        'filesize'  9577651
                                           'mtime'  1636038760
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy 12 rock cppex classic;set pl billboard
                                      'tag_artist'  John Lennon
                                     'tag_release'  The John Lennon Collection
                                       'tag_title'  (Just Like) Starting Over
                                             'bpm'  99.0
                                    'search_title'  'just':1,2 'like':3,4 'over':6 'starting':5
                                   'search_artist'  'john':1 'lennon':2
                                  'search_release'  'collection':4 'john':2 'lennon':3 'the':1
                                     'search_rest'  'billboard':9 'classic':4,6 'classicprogpsy':1 'cppex':3 'pl':8 'rock':2 'set':5,7
                                    'search_combo'  'billboard':21 'classic':16,18 'classicprogpsy':13 'collection':12C 'cppex':15 'john':7B,10C 'just':1A,2A 'lennon':8B,11C 'like':3A,4A 'over':6A 'pl':20 'rock':14 'set':17,19 'starting':5A 'the':9C
                                    'tag_tracknum'  12
                                      'num_images'  1
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-4', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['rock', 'singer songwriter', 'pop', 'british', 'classic rock']
                                        'tag_date'  1989
                                     'discogstags'  ['rock', 'pop', 'soft rock', 'pop rock', 'ballad']

============================== file details ==============================
                                           'mtime'  1636038759.7363758  (2021-11-04 16:12:39)
                             'size'  9577651