======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '296'
                                          'artist'  'Barbra Streisand'
                                     'text_people'  'Leonard Bernstein/Stephen Sondheim'
                                         'release'  'The Essential Barbra Streisand'
                                           'title'  'Somewhere'
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-OLDST-3', "
 "'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', 'q-chart-3', "
 "'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-2']")
                                      'lastfmtags'  "['80s', 'female vocalists', 'diva', 'pop', '70s']"
                                     'discogstags'  ("['jazz', 'pop', 'stage & screen', 'ballad', 'easy listening', 'theme', "
 "'vocal', 'disco']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  '18'
                                            'date'  '1985'
                                        'comments'  ''
                                           'genre'  'electronic-unsorted'
                                             'bpm'  '127.364'
                                             'key'  '3B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            '0'
'COMM:iTunNORM:eng'                                 (' 00000C1C 00000BB9 00009D00 00008C16 0003BBB6 0003BC87 00007F7E 00008037 '
 '00032D43 0002BC68')
'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 000007E0 0000000000C7A610 00000000 00B4FEB2 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_1:eng'                            'E4120E12+346872+18+150+17652+37582+56337+73947+89822+109552+129150+144967+166165+188417+206680+225390+246790+263562+285627+307615+326190'
'COMM:iTunes_CDDB_TrackNumber:eng'                  '10'
'TALB' (Album/Movie/Show title)                     'The Essential Barbra Streisand'
'TBPM' (BPM (beats per minute))                     '127.364'
'TCOM' (Composer)                                   'Leonard Bernstein/Stephen Sondheim'
'TCON' (Content type, a.k.a. Genre)                 'electronic-unsorted'
'TDRC' (Recording time)                             '1985'
'TENC' (Encoded by)                                 'iTunes 10.6.3'
'TIT2' (Title/songname/content description)         'Somewhere'
'TKEY' (Initial key)                                '3B'
'TPE1' (Lead performer(s)/Soloist(s))               'Barbra Streisand'
'TPE2' (Band/orchestra/accompaniment)               'Barbra Streisand'
'TPOS' (Part of a set)                              '2/2'
'TRCK' (Track number/Position in set)               '10/18'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['jazz',
 'pop',
 'stage & screen',
 'ballad',
 'easy listening',
 'theme',
 'vocal',
 'disco']
'TXXX:lastfmtags'                                   ['80s', 'female vocalists', 'diva', 'pop', '70s']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.62 dB'
'TXXX:replaygain_track_peak'                        '0.352510'

========================== row from database ==========================
                                              'id'  1290113
                                            'path'  /data/Music/Bulk/00poprockelectronic/1985 complete/393 Barbra Streisand - Somewhere.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  296
                                           'genre'  electronic-unsorted
                                        'filesize'  12449792
                                           'mtime'  1620565590
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 1985 complete 393 electronic unsorted
                                      'tag_artist'  Barbra Streisand
                                     'tag_release'  The Essential Barbra Streisand
                                       'tag_title'  Somewhere
                                             'bpm'  127.364
                                    'search_title'  'somewhere':1
                                   'search_artist'  'barbra':1 'streisand':2
                                  'search_release'  'barbra':3 'essential':2 'streisand':4 'the':1
                                     'search_rest'  '00poprockelectronic':1 '1985':2 '393':4 'complete':3 'electronic':5 'unsorted':6
                                    'search_combo'  '00poprockelectronic':8 '1985':9 '393':11 'barbra':2B,6C 'complete':10 'electronic':12 'essential':5C 'somewhere':1A 'streisand':3B,7C 'the':4C 'unsorted':13
                                    'tag_tracknum'  10
                                      'num_images'  1
                                             'key'  3B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', '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-1', 'q-syn-2', 'q-chart-3', 'q-other-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['80s', 'female vocalists', 'diva', 'pop', '70s']
                                        'tag_date'  1985
                                     'discogstags'  ['jazz', 'pop', 'stage & screen', 'ballad', 'easy listening', 'theme', 'vocal', 'disco']

============================== file details ==============================
                                           'mtime'  1620565590.4109051  (2021-05-09 15:06:30)
                             'size'  12449792