======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '166'
                                          'artist'  'James Brown'
                                     'text_people'  ''
                                         'release'  '20 all-Time Greatest Hits'
                                           'title'  "Say it Loud (I'm Black and I'm"
                                           '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-2', "
 "'q-chart-4', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['rnb', 'blues', 'rhythm and blues', 'soul', 'funk']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  ''
                                            'date'  '1991'
                                        'comments'  ''
                                           'genre'  'funk or soul-funk'
                                             'bpm'  '114.479'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '20 all-Time Greatest Hits'
'TBPM' (BPM (beats per minute))                     '114.479'
'TCON' (Content type, a.k.a. Genre)                 'funk or soul-funk'
'TDRC' (Recording time)                             '1991'
'TIT2' (Title/songname/content description)         "Say it Loud (I'm Black and I'm"
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'James Brown'
'TRCK' (Track number/Position in set)               '6'
'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:lastfmtags'                                   ['rnb', 'blues', 'rhythm and blues', 'soul', 'funk']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'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'                        '+2.04 dB'
'TXXX:replaygain_track_peak'                        '0.434534'

========================== row from database ==========================
                                              'id'  1506584
                                            'path'  /data/Music/Bulk/00popandrock-swing-funk-soul/Brown, James/[1991] 20 All Time Greatest Hits/James Brown - Say it Loud (I_m Black and I_m Proud), Pt. 1 - 16.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  166
                                           'genre'  funk or soul-funk
                                        'filesize'  5344657
                                           'mtime'  1620665598
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock swing funk soul Brown, [1991] All (I_m I_m Proud), Pt. 1 16 funk or soul funk
                                      'tag_artist'  James Brown
                                     'tag_release'  20 all-Time Greatest Hits
                                       'tag_title'  Say it Loud (I'm Black and I'm
                                             'bpm'  114.479
                                    'search_title'  'and':8 'black':7 'i':4,9 'im':6 'it':2 'loud':3 'm':5,10 'say':1
                                   'search_artist'  'brown':2 'james':1
                                  'search_release'  '20':1 'all':2 'alltime':4 'greatest':5 'hits':6 'time':3
                                     'search_rest'  '1':17 '1991':6,7 'all':8 'brown':4,5 'funk':2 'i':9,11 'm':10,12 'or':18 'proud':13,14 'pt':15,16 'soul':3 'swing':1
                                    'search_combo'  '1':35 '1991':24,25 '20':13C 'all':14C,26 'alltime':16C 'and':8A 'black':7A 'brown':12B,22,23 'funk':20 'greatest':17C 'hits':18C 'i':4A,9A,27,29 'im':6A 'it':2A 'james':11B 'loud':3A 'm':5A,10A,28,30 'or':36 'proud':31,32 'pt':33,34 'say':1A 'soul':21 'swing':19 'time':15C
                                    'tag_tracknum'  6
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-2', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-4', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['rnb', 'blues', 'rhythm and blues', 'soul', 'funk']
                                        'tag_date'  1991
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620665597.669229  (2021-05-10 18:53:17)
                             'size'  5344657