======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '380'
                                          'artist'  'David Bowie'
                                     'text_people'  'David Bowie'
                                         'release'  'Bowie At The Beeb [Disc 3] '
                                           'title'  "Let's Dance"
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['classic rock', '80s', 'alternative', 'rock', 'glam rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '15'
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-eos;set-pl-sced;set-pl-billboard'
                                             'bpm'  '114.028'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            ' 0000101A 00000FD5 00005D02'
'COMM:iTunNORM:eng'                                 (' 0000101A 00000FD5 00005D02 00005ED1 00024A07 00024A07 00008000 00008000 '
 '0001FC15 0001FC15')
'TALB' (Album/Movie/Show title)                     'Bowie At The Beeb [Disc 3] '
'TBPM' (BPM (beats per minute))                     '114.028'
'TCOM' (Composer)                                   'David Bowie'
'TCON' (Content type, a.k.a. Genre)                 ['ifs-songwriter-eos', 'set-pl-sced', 'set-pl-billboard']
'TDRC' (Recording time)                             '2000-01-01'
'TIT2' (Title/songname/content description)         "Let's Dance"
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'David Bowie'
'TPE2' (Band/orchestra/accompaniment)               'David Bowie'
'TRCK' (Track number/Position in set)               '15'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['classic rock', '80s', 'alternative', 'rock', 'glam rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.02 dB'
'TXXX:replaygain_track_peak'                        '0.473578'

========================== row from database ==========================
                                              'id'  1521277
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/David Bowie/[2000] Bowie At The Beeb [Disc 3]/15 Let_s Dance.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  380
                                           'genre'  ifs-songwriter-eos;set-pl-sced;set-pl-billboard
                                        'filesize'  12248601
                                           'mtime'  1636400820
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos [2000] 15 Let_s ifs songwriter eos;set pl sced;set pl billboard
                                      'tag_artist'  David Bowie
                                     'tag_release'  Bowie At The Beeb [Disc 3] 
                                       'tag_title'  Let's Dance
                                             'bpm'  114.028
                                    'search_title'  'dance':4 'let':1 'lets':3 's':2
                                   'search_artist'  'bowie':2 'david':1
                                  'search_release'  '3':7,8 'at':2 'beeb':4 'bowie':1 'disc':5,6 'the':3
                                     'search_rest'  '00singer':1 '2000':4,5 'billboard':18 'eos':3,9,11 'ifs':8 'let':6 'pl':13 's':7 'sced':14,16 'set':10,12,15,17 'songwriter':2
                                    'search_combo'  '00singer':15 '2000':18,19 '3':13C,14C 'at':8C 'beeb':10C 'billboard':32 'bowie':6B,7C 'dance':4A 'david':5B 'disc':11C,12C 'eos':17,23,25 'ifs':22 'let':1A,20 'lets':3A 'pl':27 's':2A,21 'sced':28,30 'set':24,26,29,31 'songwriter':16 'the':9C
                                    'tag_tracknum'  15
                                      'num_images'  1
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-1', 'q-chart-4', 'q-other-2', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['classic rock', '80s', 'alternative', 'rock', 'glam rock']
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636400820.2258844  (2021-11-08 20:47:00)
                             'size'  12248601