======================== unified (from filesystem) ========================
                                         'bitrate'  '177.877'
                                        'duration'  '278'
                                          'artist'  'Juan Luis Guerra 4.40'
                                     'text_people'  ''
                                         'release'  'Bachata Rosa'
                                           'title'  'Carta de Amor'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-OLDST-2', 'Q-UNU-2', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['good', 'classic', 'dominican', 'latin', 'bachata']"
                                     'discogstags'  "['latin', 'bachata', 'merengue', 'salsa']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  '10'
                                            'date'  '1990'
                                        'comments'  ''
                                           'genre'  'loc-style-latin'
                                             'bpm'  '144.335'
                                             'key'  '8B'
                                        'acoustid'  ''
rest: ''

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

'COMM:CDDB Disc ID:XXX'                             '670A310A'
'COMM:ID3v1 Comment:XXX'                            '670A310A'
'TALB' (Album/Movie/Show title)                     'Bachata Rosa'
'TBPM' (BPM (beats per minute))                     '144.335'
'TCON' (Content type, a.k.a. Genre)                 'loc-style-latin'
'TDRC' (Recording time)                             '1990'
'TIT2' (Title/songname/content description)         'Carta de Amor'
'TKEY' (Initial key)                                '8B'
'TPE1' (Lead performer(s)/Soloist(s))               'Juan Luis Guerra 4.40'
'TRCK' (Track number/Position in set)               '3/10'
'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'                                  '3'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  ['latin', 'bachata', 'merengue', 'salsa']
'TXXX:lastfmtags'                                   ['good', 'classic', 'dominican', 'latin', 'bachata']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.61 dB'
'TXXX:replaygain_track_peak'                        '0.668981'

========================== row from database ==========================
                                              'id'  773929
                                            'path'  /data/Music/Bulk/00localcharacter/Latin/Juan Luis Guerra 4.40/Bachata Rosa/Juan Luis Guerra 4.40 - Carta De Amor - 03.mp3
                                         'working'  None
                                         'bitrate'  177
                                    'duration_sec'  278
                                           'genre'  loc-style-latin
                                        'filesize'  6195199
                                           'mtime'  1620592697
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter Latin De 03 loc style latin
                                      'tag_artist'  Juan Luis Guerra 4.40
                                     'tag_release'  Bachata Rosa
                                       'tag_title'  Carta de Amor
                                             'bpm'  144.335
                                    'search_title'  'amor':3 'carta':1 'de':2
                                   'search_artist'  '4':4 '40':5 '440':6 'guerra':3 'juan':1 'luis':2
                                  'search_release'  'bachata':1 'rosa':2
                                     'search_rest'  'de':2 'latin':1 'loc':3 'style':4
                                    'search_combo'  '4':7B '40':8B '440':9B 'amor':3A 'bachata':10C 'carta':1A 'de':2A,13 'guerra':6B 'juan':4B 'latin':12 'loc':14 'luis':5B 'rosa':11C 'style':15
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  8B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['good', 'classic', 'dominican', 'latin', 'bachata']
                                        'tag_date'  1990
                                     'discogstags'  ['latin', 'bachata', 'merengue', 'salsa']

============================== file details ==============================
                                           'mtime'  1620592696.6340146  (2021-05-09 22:38:16)
                             'size'  6195199