======================== unified (from filesystem) ========================
                                         'bitrate'  '168.351'
                                        'duration'  '159'
                                          'artist'  'Joe Cocker'
                                     'text_people'  ''
                                         'release'  'The Very Best Of'
                                           'title'  'You are so beautiful'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-UNU-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-3', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'Q-PIANO-3', 'q-chart-4', 'q-drums-1', 'q-other-2', 'q-vocals-4', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['blues rock', 'blues', 'rock', 'soul', 'classic rock']"
                                     'discogstags'  "['rock', 'pop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  '16'
                                            'date'  '1989'
                                        'comments'  ''
                                           'genre'  'rock-pop-early-blues'
                                             'bpm'  '135.004'
                                             'key'  '4B'
                                        'acoustid'  ''
rest: ''

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

'COMM:CDDB Disc ID:XXX'                             'D80EA910'
'COMM:ID3v1 Comment:XXX'                            'D80EA910'
'TALB' (Album/Movie/Show title)                     'The Very Best Of'
'TBPM' (BPM (beats per minute))                     '135.004'
'TCON' (Content type, a.k.a. Genre)                 'rock-pop-early-blues'
'TDRC' (Recording time)                             '1989'
'TIT2' (Title/songname/content description)         'You are so beautiful'
'TKEY' (Initial key)                                '4B'
'TPE1' (Lead performer(s)/Soloist(s))               'Joe Cocker'
'TRCK' (Track number/Position in set)               '5/16'
'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'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'pop']
'TXXX:lastfmtags'                                   ['blues rock', 'blues', 'rock', 'soul', 'classic rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.67 dB'
'TXXX:replaygain_track_peak'                        '0.592751'

========================== row from database ==========================
                                              'id'  1421260
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/Joe Cocker/The Very Best Of/Joe Cocker - 05 - You are so beautiful.mp3
                                         'working'  None
                                         'bitrate'  168
                                    'duration_sec'  159
                                           'genre'  rock-pop-early-blues
                                        'filesize'  3349156
                                           'mtime'  1620736711
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy 05 rock pop early blues
                                      'tag_artist'  Joe Cocker
                                     'tag_release'  The Very Best Of
                                       'tag_title'  You are so beautiful
                                             'bpm'  135.004
                                    'search_title'  'are':2 'beautiful':4 'so':3 'you':1
                                   'search_artist'  'cocker':2 'joe':1
                                  'search_release'  'best':3 'of':4 'the':1 'very':2
                                     'search_rest'  'blues':5 'classicprogpsy':1 'early':4 'pop':3 'rock':2
                                    'search_combo'  'are':2A 'beautiful':4A 'best':9C 'blues':15 'classicprogpsy':11 'cocker':6B 'early':14 'joe':5B 'of':10C 'pop':13 'rock':12 'so':3A 'the':7C 'very':8C 'you':1A
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  4B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-mixbeat-2', 'Q-PIANO-3', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-2', 'q-chart-4', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['blues rock', 'blues', 'rock', 'soul', 'classic rock']
                                        'tag_date'  1989
                                     'discogstags'  ['rock', 'pop']

============================== file details ==============================
                                           'mtime'  1620736710.5039904  (2021-05-11 14:38:30)
                             'size'  3349156