======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '174'
                                          'artist'  'Jack Johnson'
                                     'text_people'  ''
                                         'release'  'On And On'
                                           'title'  'Holes To Heaven'
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-4', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['acoustic', 'alternative', 'chill', 'rock', 'singer songwriter']"
                                     'discogstags'  "['rock', 'acoustic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '8'
                                      'tracktotal'  '16'
                                            'date'  '2003'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter'
                                             'bpm'  '123.935'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            ' 00000A20 00000221 0000B58E'
'COMM:iTunNORM:eng'                                 (' 00000A20 00000221 0000B58E 0000548E 0001CD87 0001C36D 000090AD 0000893C '
 '0000DE24 0001BBE0')
'COMM:iTunes_CDDB_1:eng'                            'D40A5210+198352+16+150+10795+22317+35138+53084+62835+67766+85051+98164+108135+120940+128131+141389+153270+172086+185580'
'COMM:iTunes_CDDB_TrackNumber:eng'                  '8'
'TALB' (Album/Movie/Show title)                     'On And On'
'TBPM' (BPM (beats per minute))                     '123.935'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter'
'TDRC' (Recording time)                             '2003'
'TENC' (Encoded by)                                 'iTunes v4.9.0.17'
'TIT2' (Title/songname/content description)         'Holes To Heaven'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Jack Johnson'
'TRCK' (Track number/Position in set)               '8/16'
'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:discogstags'                                  ['rock', 'acoustic']
'TXXX:lastfmtags'                                   ['acoustic', 'alternative', 'chill', 'rock', 'singer songwriter']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.11 dB'
'TXXX:replaygain_track_peak'                        '0.536876'

========================== row from database ==========================
                                              'id'  1284674
                                            'path'  /data/Music/Bulk/00poprockelectronic/Jack Johnson/Jack Johnson_/On And On/08 Holes To Heaven.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  174
                                           'genre'  ifs-songwriter
                                        'filesize'  3506176
                                           'mtime'  1636915910
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Johnson_ 08 ifs songwriter
                                      'tag_artist'  Jack Johnson
                                     'tag_release'  On And On
                                       'tag_title'  Holes To Heaven
                                             'bpm'  123.935
                                    'search_title'  'heaven':3 'holes':1 'to':2
                                   'search_artist'  'jack':1 'johnson':2
                                  'search_release'  'and':2 'on':1
                                     'search_rest'  '00poprockelectronic':1 'ifs':3 'johnson':2 'songwriter':4
                                    'search_combo'  '00poprockelectronic':8 'and':7C 'heaven':3A 'holes':1A 'ifs':10 'jack':4B 'johnson':5B,9 'on':6C 'songwriter':11 'to':2A
                                    'tag_tracknum'  8
                                      'num_images'  1
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['acoustic', 'alternative', 'chill', 'rock', 'singer songwriter']
                                        'tag_date'  2003
                                     'discogstags'  ['rock', 'acoustic']

============================== file details ==============================
                                           'mtime'  1636915910.4704065  (2021-11-14 19:51:50)
                             'size'  3506176