======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '228'
                                          'artist'  'Sinn Sisamouth'
                                     'text_people'  ''
                                         'release'  'Uploads from Samouth Khmer (50s-70s Asian)'
                                           'title'  'Komrong Phorng Phakol'
                                           '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-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['all', 'khmer', 'cambodia', 'cambodian', 'rock', 'psychedelic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  ''
                                            'date'  '1960'
                                        'comments'  ''
                                           'genre'  'loc-asia-cambodia'
                                             'bpm'  '113.073'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Uploads from Samouth Khmer (50s-70s Asian)'
'TBPM' (BPM (beats per minute))                     '113.073'
'TCON' (Content type, a.k.a. Genre)                 'loc-asia-cambodia'
'TDRC' (Recording time)                             '1960'
'TIT2' (Title/songname/content description)         'Komrong Phorng Phakol'
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Sinn Sisamouth'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '5'
'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:lastfmtags'                                   ['all', 'khmer', 'cambodia', 'cambodian', 'rock', 'psychedelic']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.59 dB'
'TXXX:replaygain_track_peak'                        '0.426960'

========================== row from database ==========================
                                              'id'  1493814
                                            'path'  /data/Music/Bulk/00localcharacter/00asia/Uploads from Samouth Khmer (50s-70s Asian)/5 Sinn Sisamouth - Komrong Phorng Phakol.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  228
                                           'genre'  loc-asia-cambodia
                                        'filesize'  7305465
                                           'mtime'  1621509063
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00asia loc asia cambodia
                                      'tag_artist'  Sinn Sisamouth
                                     'tag_release'  Uploads from Samouth Khmer (50s-70s Asian)
                                       'tag_title'  Komrong Phorng Phakol
                                             'bpm'  113.073
                                    'search_title'  'komrong':1 'phakol':3 'phorng':2
                                   'search_artist'  'sinn':1 'sisamouth':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':15 '50s':10C '50s70s':12C '70s':11C 'asia':17 'asian':13C,14C 'cambodia':18 'from':7C 'khmer':9C 'komrong':1A 'loc':16 'phakol':3A 'phorng':2A 'samouth':8C 'sinn':4B 'sisamouth':5B 'uploads':6C
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['all', 'khmer', 'cambodia', 'cambodian', 'rock', 'psychedelic']
                                        'tag_date'  1960
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621509063.129253  (2021-05-20 13:11:03)
                             'size'  7305465