======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '312'
                                          'artist'  'Cheb khaled'
                                     'text_people'  ''
                                         'release'  'Arabic Music Singles'
                                           'title'  ' abdel-kader (Arabic)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-3', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'Q-LOCALNESS-4', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['arabic', 'rai', 'world', 'algerian', 'world music']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'loc-m'
                                             'bpm'  '104.985'
                                             'key'  '5A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Arabic Music Singles'
'TBPM' (BPM (beats per minute))                     '104.985'
'TCON' (Content type, a.k.a. Genre)                 'loc-m'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         ' abdel-kader (Arabic)'
'TKEY' (Initial key)                                '5A'
'TPE1' (Lead performer(s)/Soloist(s))               'Cheb khaled'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TXXX:Mp3gain_minmax'                               '166,200'
'TXXX:Mp3gain_undo'                                 '+006,+006,N'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '4'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '3'
'TXXX:lastfmtags'                                   ['arabic', 'rai', 'world', 'algerian', 'world music']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.14 dB'
'TXXX:replaygain_track_peak'                        '0.510900'

========================== row from database ==========================
                                              'id'  928953
                                            'path'  /data/Music/Bulk/00localcharacter/00south-europe-middle-east/Arabic Music Singles/3 High Volume [96k-160k]/Cheb khaled - abdel-kader (Arabic).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  312
                                           'genre'  loc-m
                                        'filesize'  5007097
                                           'mtime'  1620526438
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00south europe middle east 3 High Volume [96k 160k] loc m
                                      'tag_artist'  Cheb khaled
                                     'tag_release'  Arabic Music Singles
                                       'tag_title'   abdel-kader (Arabic)
                                             'bpm'  104.985
                                    'search_title'  'abdel':1 'abdelkader':3 'arabic':4,5 'kader':2
                                   'search_artist'  'cheb':1 'khaled':2
                                  'search_release'  'arabic':1 'music':2 'singles':3
                                     'search_rest'  '00south':1 '160k':10,11 '3':5 '96k':8,9 'east':4 'europe':2 'high':6 'loc':12 'm':13 'middle':3 'volume':7
                                    'search_combo'  '00south':11 '160k':20,21 '3':15 '96k':18,19 'abdel':1A 'abdelkader':3A 'arabic':4A,5A,8C 'cheb':6B 'east':14 'europe':12 'high':16 'kader':2A 'khaled':7B 'loc':22 'm':23 'middle':13 'music':9C 'singles':10C 'volume':17
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  5A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-4', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-3', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['arabic', 'rai', 'world', 'algerian', 'world music']
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620526437.899196  (2021-05-09 04:13:57)
                             'size'  5007097