======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '187'
                                          'artist'  'Marvin Gaye'
                                     'text_people'  ''
                                         'release'  'The Very Best of Marvin Gaye'
                                           'title'  'You Are Everything (With Diana'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-HHRNBTT-2', 'Q-JZFKS-3', 'Q-UNU-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['rnb', 'motown', 'rhythm and blues', 'soul', 'funk']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '2002'
                                        'comments'  ''
                                           'genre'  'funk or soul'
                                             'bpm'  '145.790'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Very Best of Marvin Gaye'
'TBPM' (BPM (beats per minute))                     '145.790'
'TCON' (Content type, a.k.a. Genre)                 'funk or soul'
'TDRC' (Recording time)                             '2002'
'TIT2' (Title/songname/content description)         'You Are Everything (With Diana'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Marvin Gaye'
'TRCK' (Track number/Position in set)               '4'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '2'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['rnb', 'motown', 'rhythm and blues', 'soul', 'funk']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.73 dB'
'TXXX:replaygain_track_peak'                        '0.390777'

========================== row from database ==========================
                                              'id'  1358357
                                            'path'  /data/Music/Bulk/00poprockelectronic/Marvin Gaye/The Very Best Of Marvin Gaye__MBZ;#Marvin Gaye;#The Very Best of Marvin Gaye;#04;#You Are Everything (with Diana Ross).mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  187
                                           'genre'  funk or soul
                                        'filesize'  4495232
                                           'mtime'  1628357930
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Of Gaye__MBZ;#Marvin Gaye;#The Gaye;#04;#You (with Ross) funk or soul
                                      'tag_artist'  Marvin Gaye
                                     'tag_release'  The Very Best of Marvin Gaye
                                       'tag_title'  You Are Everything (With Diana
                                             'bpm'  145.79
                                    'search_title'  'are':2 'diana':6 'everything':3 'with':4,5 'you':1
                                   'search_artist'  'gaye':2 'marvin':1
                                  'search_release'  'best':3 'gaye':6 'marvin':5 'of':4 'the':1 'very':2
                                     'search_rest'  '00poprockelectronic':1 '04':14,17 'funk':23 'gaye':3,6,9,11,13,16 'marvin':5,8 'mbz':4,7 'of':2 'or':24 'ross':21,22 'soul':25 'the':10,12 'with':19,20 'you':15,18
                                    'search_combo'  '00poprockelectronic':15 '04':28,31 'are':2A 'best':11C 'diana':6A 'everything':3A 'funk':37 'gaye':8B,14C,17,20,23,25,27,30 'marvin':7B,13C,19,22 'mbz':18,21 'of':12C,16 'or':38 'ross':35,36 'soul':39 'the':9C,24,26 'very':10C 'with':4A,5A,33,34 'you':1A,29,32
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-2', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['rnb', 'motown', 'rhythm and blues', 'soul', 'funk']
                                        'tag_date'  2002
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1628357930.4243855  (2021-08-07 19:38:50)
                             'size'  4495232