======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '240'
                                          'artist'  'Daft Punk'
                                     'text_people'  ''
                                         'release'  'Discovery'
                                           'title'  'Face to Face'
                                           'quals'  ("['Q-HAP-3', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-OLDST-3', "
 "'Q-UNU-1', 'q-syn-3', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['dance', 'house', 'electronica', 'electronic', 'techno']"
                                     'discogstags'  "['electronic', 'house', 'downtempo', 'tech house']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '13'
                                      'tracktotal'  '14'
                                            'date'  '2001'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-dance'
                                             'bpm'  '117.808'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Discovery'
'TBPM' (BPM (beats per minute))                     '117.808'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-dance'
'TDRC' (Recording time)                             '2001'
'TIT2' (Title/songname/content description)         'Face to Face'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Daft Punk'
'TPUB' (Publisher)                                  'Virgin'
'TRCK' (Track number/Position in set)               '13/14'
'TSSE' (Software/Hardware and settings used for encoding)  'Lame3.99'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['electronic', 'house', 'downtempo', 'tech house']
'TXXX:lastfmtags'                                   ['dance', 'house', 'electronica', 'electronic', 'techno']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.81 dB'
'TXXX:replaygain_track_peak'                        '0.619694'

========================== row from database ==========================
                                              'id'  1310655
                                            'path'  /data/Music/Bulk/00poprockelectronic/set/13. Face To Face.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  240
                                           'genre'  electronic-generic or radio-dance
                                        'filesize'  9648847
                                           'mtime'  1621696883
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic set 13. To electronic generic or radio dance
                                      'tag_artist'  Daft Punk
                                     'tag_release'  Discovery
                                       'tag_title'  Face to Face
                                             'bpm'  117.808
                                    'search_title'  'face':1 'to':2
                                   'search_artist'  'daft':1 'punk':2
                                  'search_release'  'discovery':1
                                     'search_rest'  '00poprockelectronic':1 '13':3,4 'dance':10 'electronic':6 'generic':7 'or':8 'radio':9 'set':2 'to':5
                                    'search_combo'  '00poprockelectronic':6 '13':8,9 'daft':3B 'dance':15 'discovery':5C 'electronic':11 'face':1A 'generic':12 'or':13 'punk':4B 'radio':14 'set':7 'to':2A,10
                                    'tag_tracknum'  13
                                      'num_images'  1
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-3', 'q-chart-4', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['dance', 'house', 'electronica', 'electronic', 'techno']
                                        'tag_date'  2001
                                     'discogstags'  ['electronic', 'house', 'downtempo', 'tech house']

============================== file details ==============================
                                           'mtime'  1621696883.1620147  (2021-05-22 17:21:23)
                             'size'  9648847