======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '145'
                                          'artist'  'In Yeang And Ros Sereysothea'
                                     'text_people'  ''
                                         'release'  'Uploads from Samouth Khmer (50s-70s Asian)'
                                           'title'  'Chien Cherng Men Rouch'
                                           'quals'  ("['Q-HAP-3', 'Q-HHRNBTT-1', 'Q-UNU-3', 'Q-JZFKS-1', 'Q-OLDST-2', "
 "'Q-LOCALNESS-4', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1960'
                                        'comments'  ''
                                           'genre'  'loc-asia-cambodia'
                                             'bpm'  '140.823'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Uploads from Samouth Khmer (50s-70s Asian)'
'TBPM' (BPM (beats per minute))                     '140.823'
'TCON' (Content type, a.k.a. Genre)                 'loc-asia-cambodia'
'TDRC' (Recording time)                             '1960'
'TIT2' (Title/songname/content description)         'Chien Cherng Men Rouch'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'In Yeang And Ros Sereysothea'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TSSE' (Software/Hardware and settings used for encoding)  'Lavf55.33.100'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '4'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '3'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.11 dB'
'TXXX:replaygain_track_peak'                        '0.485618'

========================== row from database ==========================
                                              'id'  1493707
                                            'path'  /data/Music/Bulk/00localcharacter/00asia/Uploads from Samouth Khmer (50s-70s Asian)/In Yeang And Ros Sereysothea - Chien Cherng Men Rouch.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  145
                                           'genre'  loc-asia-cambodia
                                        'filesize'  4643901
                                           'mtime'  1621509093
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00asia loc asia cambodia
                                      'tag_artist'  In Yeang And Ros Sereysothea
                                     'tag_release'  Uploads from Samouth Khmer (50s-70s Asian)
                                       'tag_title'  Chien Cherng Men Rouch
                                             'bpm'  140.823
                                    'search_title'  'cherng':2 'chien':1 'men':3 'rouch':4
                                   'search_artist'  'and':3 'in':1 'ros':4 'sereysothea':5 'yeang':2
                                  'search_release'  '50s':5 '50s70s':7 '70s':6 'asian':8,9 'from':2 'khmer':4 'samouth':3 'uploads':1
                                     'search_rest'  '00asia':1 'asia':3 'cambodia':4 'loc':2
                                    'search_combo'  '00asia':19 '50s':14C '50s70s':16C '70s':15C 'and':7B 'asia':21 'asian':17C,18C 'cambodia':22 'cherng':2A 'chien':1A 'from':11C 'in':5B 'khmer':13C 'loc':20 'men':3A 'ros':8B 'rouch':4A 'samouth':12C 'sereysothea':9B 'uploads':10C 'yeang':6B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-4', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-3', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1960
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621509093.1776369  (2021-05-20 13:11:33)
                             'size'  4643901