======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '284'
                                          'artist'  '10cc'
                                     'text_people'  ''
                                         'release'  'Greatest Hits 1972-1978'
                                           'title'  'Rubber Bullets'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-4', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['british', 'rock', 'pop', '70s', 'classic rock']"
                                     'discogstags'  "['rock', 'pop rock', 'classic rock', 'art rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  '12'
                                            'date'  '1983'
                                        'comments'  ''
                                           'genre'  'rock-pop-soft'
                                             'bpm'  '145.163'
                                             'key'  '10A'
                                        'acoustid'  '034f5d4e-e4d0-49da-a979-07a6f13a5c4f'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            ' 000001E6 00000150 000009D4'
'COMM:iTunNORM:eng'                                 (' 000001E6 00000150 000009D4 000005B5 000382B5 0000C37E 0000409F 000035E3 '
 '000382B5 0001FBE7')
'MCDI' (Music CD identifier)                        MCDI(data=b'C\x00+\x00B\x007\x00+\x005\x003\x00F\x005\x00+\x008\x007\x00D\x00C\x00+\x00C\x001\x005\x002\x00+\x00F\x004\x003\x001\x00+\x001\x004\x002\x00D\x00D\x00+\x001\x008\x007\x004\x003\x00+\x001\x00D\x004\x000\x00F\x00+\x002\x003\x002\x005\x003\x00+\x002\x006\x005\x00A\x00C\x00+\x002\x00A\x001\x002\x00F\x00+\x002\x00F\x009\x00D\x004\x00+\x003\x006\x005\x004\x007\x00\x00\x00')
'TALB' (Album/Movie/Show title)                     'Greatest Hits 1972-1978'
'TBPM' (BPM (beats per minute))                     '145.163'
'TCON' (Content type, a.k.a. Genre)                 'rock-pop-soft'
'TDOR' (Original release time)                      '1979'
'TDRC' (Recording time)                             '1983'
'TIT2' (Title/songname/content description)         'Rubber Bullets'
'TKEY' (Initial key)                                '10A'
'TLEN' (Length)                                     '284133'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               '10cc'
'TPE2' (Band/orchestra/accompaniment)               '10cc'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Mercury Records'
'TRCK' (Track number/Position in set)               '1/12'
'TSO2'                                              '10cc'
'TSOP' (Performer sort order)                       '10cc'
'TSRC' (ISRC (international standard recording code))  'GBF087300180'
'TXXX:Acoustid Id'                                  '034f5d4e-e4d0-49da-a979-07a6f13a5c4f'
'TXXX:BARCODE'                                      '042280005627'
'TXXX:CATALOGNUMBER'                                '800 056-2'
'TXXX:MusicBrainz Album Artist Id'                  'f37c537b-3557-4031-bfd6-ab63ced32854'
'TXXX:MusicBrainz Album Id'                         '38254350-e1d0-44b4-b069-5babae614fdf'
'TXXX:MusicBrainz Album Release Country'            'DE'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'compilation'
'TXXX:MusicBrainz Artist Id'                        'f37c537b-3557-4031-bfd6-ab63ced32854'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['rock', 'pop rock', 'classic rock', 'art rock']
'TXXX:lastfmtags'                                   ['british', 'rock', 'pop', '70s', 'classic rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.12 dB'
'TXXX:replaygain_track_peak'                        '0.639334'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'29cd9557-5aa2-4ec1-b93f-f232c339fe31')

========================== row from database ==========================
                                              'id'  1409486
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/10CC/Greatest Hits 1972-1978/01 Rubber Bullets.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  284
                                           'genre'  rock-pop-soft
                                        'filesize'  4569225
                                           'mtime'  1620736299
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy 10CC 01 rock pop soft
                                      'tag_artist'  10cc
                                     'tag_release'  Greatest Hits 1972-1978
                                       'tag_title'  Rubber Bullets
                                             'bpm'  145.163
                                    'search_title'  'bullets':2 'rubber':1
                                   'search_artist'  '10cc':1
                                  'search_release'  '1972':3 '19721978':5 '1978':4 'greatest':1 'hits':2
                                     'search_rest'  '10cc':2 'classicprogpsy':1 'pop':4 'rock':3 'soft':5
                                    'search_combo'  '10cc':3B,10 '1972':6C '19721978':8C '1978':7C 'bullets':2A 'classicprogpsy':9 'greatest':4C 'hits':5C 'pop':12 'rock':11 'rubber':1A 'soft':13
                                    'tag_tracknum'  1
                                      'num_images'  1
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', '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'  ['british', 'rock', 'pop', '70s', 'classic rock']
                                        'tag_date'  1983
                                     'discogstags'  ['rock', 'pop rock', 'classic rock', 'art rock']

============================== file details ==============================
                                           'mtime'  1620736298.9927123  (2021-05-11 14:31:38)
                             'size'  4569225