======================== unified (from filesystem) ========================
                                         'bitrate'  '172.249'
                                        'duration'  '209'
                                          'artist'  'Aretha Franklin'
                                     'text_people'  ''
                                         'release'  '20 Greatest Hits'
                                           'title'  'Spanish Harlem'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-OLDST-2', "
 "'Q-HHRNBTT-3', 'Q-PLAY-2', 'q-syn-2', 'q-bass-1', 'q-busy-2', 'q-grit-1', "
 "'Q-PIANO-2', 'q-chart-4', 'q-drums-3', 'q-other-2', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['rhythm and blues', 'blues', 'jazz', 'female vocalists', 'soul']"
                                     'discogstags'  "['funk / soul', 'soul']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '17'
                                      'tracktotal'  '20'
                                            'date'  '1987'
                                        'comments'  ''
                                           'genre'  'funk or soul-soul-rnb;set-pl-billboard'
                                             'bpm'  '116.722'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'COMM:CDDB Disc ID:XXX'                             'FB0E7014'
'COMM:ID3v1 Comment:XXX'                            'FB0E7014'
'TALB' (Album/Movie/Show title)                     '20 Greatest Hits'
'TBPM' (BPM (beats per minute))                     '116.722'
'TCON' (Content type, a.k.a. Genre)                 ['funk or soul-soul-rnb', 'set-pl-billboard']
'TDRC' (Recording time)                             '1987'
'TIT2' (Title/songname/content description)         'Spanish Harlem'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'Aretha Franklin'
'TRCK' (Track number/Position in set)               '17/20'
'TSSE' (Software/Hardware and settings used for encoding)  'Audiograbber 1.80, LAME dll 3.89, VBR 3, Stereo, High quality'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '3'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['funk / soul', 'soul']
'TXXX:lastfmtags'                                   ['rhythm and blues', 'blues', 'jazz', 'female vocalists', 'soul']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.35 dB'
'TXXX:replaygain_track_peak'                        '0.832416'

========================== row from database ==========================
                                              'id'  794220
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Aretha Franklin/20 Greatest Hits/Aretha Franklin - Spanish Harlem.mp3
                                         'working'  None
                                         'bitrate'  172
                                    'duration_sec'  209
                                           'genre'  funk or soul-soul-rnb;set-pl-billboard
                                        'filesize'  4507520
                                           'mtime'  1620526715
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country funk or soul soul rnb;set pl billboard
                                      'tag_artist'  Aretha Franklin
                                     'tag_release'  20 Greatest Hits
                                       'tag_title'  Spanish Harlem
                                             'bpm'  116.722
                                    'search_title'  'harlem':2 'spanish':1
                                   'search_artist'  'aretha':1 'franklin':2
                                  'search_release'  '20':1 'greatest':2 'hits':3
                                     'search_rest'  'billboard':13 'country':4 'exotica':2 'funk':5 'jazz':1 'oldies':3 'or':6 'pl':12 'rnb':8,10 'set':9,11 'soul':7
                                    'search_combo'  '20':5C 'aretha':3B 'billboard':20 'country':11 'exotica':9 'franklin':4B 'funk':12 'greatest':6C 'harlem':2A 'hits':7C 'jazz':8 'oldies':10 'or':13 'pl':19 'rnb':15,17 'set':16,18 'soul':14 'spanish':1A
                                    'tag_tracknum'  17
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-3', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-2', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['rhythm and blues', 'blues', 'jazz', 'female vocalists', 'soul']
                                        'tag_date'  1987
                                     'discogstags'  ['funk / soul', 'soul']

============================== file details ==============================
                                           'mtime'  1620526715.3792152  (2021-05-09 04:18:35)
                             'size'  4507520