======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '280'
                                          'artist'  'Madonna'
                                     'text_people'  ''
                                         'release'  'Rain'
                                           'title'  'Waiting (Remix)'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['dance', '80s', 'female vocalists', 'pop', 'electronic']"
                                     'discogstags'  "['electronic', 'house', 'downtempo']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '2001'
                                        'comments'  ''
                                           'genre'  'electronic-unsorted'
                                             'bpm'  '95.259'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Rain'
'TBPM' (BPM (beats per minute))                     '95.259'
'TCON' (Content type, a.k.a. Genre)                 'electronic-unsorted'
'TDRC' (Recording time)                             '2001'
'TIT2' (Title/songname/content description)         'Waiting (Remix)'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Madonna'
'TRCK' (Track number/Position in set)               '2'
'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']
'TXXX:lastfmtags'                                   ['dance', '80s', 'female vocalists', 'pop', 'electronic']
'TXXX:original release date'                        ['1993', '2001']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-1.05 dB'
'TXXX:replaygain_track_peak'                        '0.714803'

========================== row from database ==========================
                                              'id'  1302112
                                            'path'  /data/Music/Bulk/00poprockelectronic/Madonna/MBZ;#Madonna;#Rain;#02;#Waiting (Remix).mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  280
                                           'genre'  electronic-unsorted
                                        'filesize'  11243088
                                           'mtime'  1621696346
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic MBZ;#Madonna;#Rain;#02;#Waiting electronic unsorted
                                      'tag_artist'  Madonna
                                     'tag_release'  Rain
                                       'tag_title'  Waiting (Remix)
                                             'bpm'  95.259
                                    'search_title'  'remix':2,3 'waiting':1
                                   'search_artist'  'madonna':1
                                  'search_release'  'rain':1
                                     'search_rest'  '00poprockelectronic':1 '02':5,10 'electronic':12 'madonna':3,8 'mbz':2,7 'rain':4,9 'unsorted':13 'waiting':6,11
                                    'search_combo'  '00poprockelectronic':6 '02':10,15 'electronic':17 'madonna':4B,8,13 'mbz':7,12 'rain':5C,9,14 'remix':2A,3A 'unsorted':18 'waiting':1A,11,16
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-4', 'q-other-1', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['dance', '80s', 'female vocalists', 'pop', 'electronic']
                                        'tag_date'  2001
                                     'discogstags'  ['electronic', 'house', 'downtempo']

============================== file details ==============================
                                           'mtime'  1621696346.0822554  (2021-05-22 17:12:26)
                             'size'  11243088