======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '269'
                                          'artist'  'Ohio Players'
                                     'text_people'  ''
                                         'release'  'Ecstasy'
                                           'title'  'Silly Billy'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-HHRNBTT-2', 'Q-UNU-1', 'Q-JZFKS-4', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['disco', 'rhythm and blues', 'soul', 'funk', '70s']"
                                     'discogstags'  "['funk / soul', 'funk', 'disco']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '9'
                                      'tracktotal'  '15'
                                            'date'  '1973'
                                        'comments'  ''
                                           'genre'  'funk or soul-funk'
                                             'bpm'  '140.3'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:iTunNORM:eng'                                 (' 000002DA 00000210 000036C4 0000613F 00005EE5 0002913E 000080E0 00007EB1 '
 '00030805 00028A34')
'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000AD4 0000000000B56D1C 00000000 0062AFAD 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '15+1F65B0EB091B234DC78FD2B68F0B5A8D+8915667'
'TALB' (Album/Movie/Show title)                     'Ecstasy'
'TBPM' (BPM (beats per minute))                     '140.3'
'TCON' (Content type, a.k.a. Genre)                 'funk or soul-funk'
'TDRC' (Recording time)                             '1973'
'TENC' (Encoded by)                                 'iTunes v7.5'
'TIT2' (Title/songname/content description)         'Silly Billy'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Ohio Players'
'TRCK' (Track number/Position in set)               '9/15'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '2'
'TXXX:Q-JZFKS'                                      '4'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['funk / soul', 'funk', 'disco']
'TXXX:lastfmtags'                                   ['disco', 'rhythm and blues', 'soul', 'funk', '70s']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'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'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.51 dB'
'TXXX:replaygain_track_peak'                        '0.710678'

========================== row from database ==========================
                                              'id'  1113815
                                            'path'  /data/Music/Bulk/00popandrock-swing-funk-soul/ohio players/1973 2 ecstasy/b4 ohio players - silly billy.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  269
                                           'genre'  funk or soul-funk
                                        'filesize'  6963781
                                           'mtime'  1620665745
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock swing funk soul ohio players 1973 2 ecstasy b4 ohio players silly billy funk or soul funk
                                      'tag_artist'  Ohio Players
                                     'tag_release'  Ecstasy
                                       'tag_title'  Silly Billy
                                             'bpm'  140.3
                                    'search_title'  'billy':2 'silly':1
                                   'search_artist'  'ohio':1 'players':2
                                  'search_release'  'ecstasy':1
                                     'search_rest'  '1973':6 '2':7 'b4':9 'billy':11 'ecstasy':8 'funk':2 'ohio':4 'or':12 'players':5 'silly':10 'soul':3 'swing':1
                                    'search_combo'  '1973':11 '2':12 'b4':14 'billy':2A,16 'ecstasy':5C,13 'funk':7 'ohio':3B,9 'or':17 'players':4B,10 'silly':1A,15 'soul':8 'swing':6
                                    'tag_tracknum'  9
                                      'num_images'  1
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-2', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-4', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-3', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['disco', 'rhythm and blues', 'soul', 'funk', '70s']
                                        'tag_date'  1973
                                     'discogstags'  ['funk / soul', 'funk', 'disco']

============================== file details ==============================
                                           'mtime'  1620665745.3707159  (2021-05-10 18:55:45)
                             'size'  6963781