======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '131'
                                          'artist'  'Chordettes'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Lollipop'
                                           'quals'  ("['Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', "
 "'q-drums-2', 'q-other-1', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']")
                                      'lastfmtags'  "['50s', 'oldies', 'female vocalists', 'doo wop', 'pop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '37'
                                      'tracktotal'  ''
                                            'date'  '1958'
                                        'comments'  ''
                                           'genre'  'set-th-candy'
                                             'bpm'  '143.4'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'PRIV:AverageLevel:{\x11\x00\x00'                   PRIV(owner='AverageLevel', data=b'{\x11\x00\x00')
'PRIV:PeakValue:¡|\x00\x00'                         PRIV(owner='PeakValue', data=b'\xa1|\x00\x00')
'TBPM' (BPM (beats per minute))                     '143.4'
'TCON' (Content type, a.k.a. Genre)                 'set-th-candy'
'TDRC' (Recording time)                             '1958'
'TIT2' (Title/songname/content description)         'Lollipop'
'TKEY' (Initial key)                                '8A'
'TLEN' (Length)                                     '0'
'TPE1' (Lead performer(s)/Soloist(s))               'Chordettes'
'TRCK' (Track number/Position in set)               '37'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:Rating'                                       '0'
'TXXX:SongRights'                                   'broadcast'
'TXXX:SongType'                                     'S'
'TXXX:lastfmtags'                                   ['50s', 'oldies', 'female vocalists', 'doo wop', 'pop']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.41 dB'
'TXXX:replaygain_track_peak'                        '0.487635'

========================== row from database ==========================
                                              'id'  735771
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/sweets/The Chordettes - Lollipop.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  131
                                           'genre'  set-th-candy
                                        'filesize'  3168256
                                           'mtime'  1620343128
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country sweets The set th candy
                                      'tag_artist'  Chordettes
                                     'tag_release'  None
                                       'tag_title'  Lollipop
                                             'bpm'  143.4
                                    'search_title'  'lollipop':1
                                   'search_artist'  'chordettes':1
                                  'search_release'  
                                     'search_rest'  'candy':9 'country':4 'exotica':2 'jazz':1 'oldies':3 'set':7 'sweets':5 'th':8 'the':6
                                    'search_combo'  'candy':11 'chordettes':2B 'country':6 'exotica':4 'jazz':3 'lollipop':1A 'oldies':5 'set':9 'sweets':7 'th':10 'the':8
                                    'tag_tracknum'  37
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-1', 'q-chart-2', 'q-other-1', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['50s', 'oldies', 'female vocalists', 'doo wop', 'pop']
                                        'tag_date'  1958
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620343127.76318  (2021-05-07 01:18:47)
                             'size'  3168256