======================== unified (from filesystem) ========================
                                         'bitrate'  '192.007'
                                        'duration'  '170'
                                          'artist'  'Charlie Poole with The North Carolina Ramblers'
                                     'text_people'  ''
                                         'release'  'sweets'
                                           'title'  'Sweet Sixteen'
                                           'quals'  ("['Q-OLDST-2', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'q-syn-1', "
 "'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', 'q-drums-1', "
 "'q-other-4', 'q-piano-1', 'q-vocals-3', 'Q-HHRNBTT-1', 'q-mixbeat-1']")
                                      'lastfmtags'  "['folk', 'all', 'country', 'anthology of american folk music', 'geography']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'set-th-candy'
                                             'bpm'  '116.053'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'PRIV:AverageLevel:{\x12\x00\x00'                   PRIV(owner='AverageLevel', data=b'{\x12\x00\x00')
'PRIV:PeakValue:!v\x00\x00'                         PRIV(owner='PeakValue', data=b'!v\x00\x00')
'TALB' (Album/Movie/Show title)                     'sweets'
'TBPM' (BPM (beats per minute))                     '116.053'
'TCON' (Content type, a.k.a. Genre)                 'set-th-candy'
'TENC' (Encoded by)                                 'Amadeus II'
'TIT2' (Title/songname/content description)         'Sweet Sixteen'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Charlie Poole with The North Carolina Ramblers'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['folk', 'all', 'country', 'anthology of american folk music', 'geography']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'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'                        '+2.16 dB'
'TXXX:replaygain_track_peak'                        '0.388027'

========================== row from database ==========================
                                              'id'  735940
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/sweets/Charlie Poole with The North Carolina Ramblers - Sweet Sixteen.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  170
                                           'genre'  set-th-candy
                                        'filesize'  4103020
                                           'mtime'  1620343111
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country set candy
                                      'tag_artist'  Charlie Poole with The North Carolina Ramblers
                                     'tag_release'  sweets
                                       'tag_title'  Sweet Sixteen
                                             'bpm'  116.053
                                    'search_title'  'sixteen':2 'sweet':1
                                   'search_artist'  'carolina':6 'charlie':1 'north':5 'poole':2 'ramblers':7 'the':4 'with':3
                                  'search_release'  'sweets':1
                                     'search_rest'  'candy':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'set':5
                                    'search_combo'  'candy':16 'carolina':8B 'charlie':3B 'country':14 'exotica':12 'jazz':11 'north':7B 'oldies':13 'poole':4B 'ramblers':9B 'set':15 'sixteen':2A 'sweet':1A 'sweets':10C 'the':6B 'with':5B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['folk', 'all', 'country', 'anthology of american folk music', 'geography']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620343110.6205413  (2021-05-07 01:18:30)
                             'size'  4103020