======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '416'
                                          'artist'  'Lena Lindbergh'
                                     'text_people'  ''
                                         'release'  'Nachtwandler 12 (Deep Electronic House)'
                                           'title'  'Let It Go (Original Mix)'
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'q-syn-3', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', "
 "'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-1', 'q-mixbeat-2']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2015'
                                        'comments'  ''
                                           'genre'  'electronic-unsorted'
                                             'bpm'  '123.00'
                                             'key'  '11A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Nachtwandler 12 (Deep Electronic House)'
'TBPM' (BPM (beats per minute))                     '123.00'
'TCON' (Content type, a.k.a. Genre)                 'electronic-unsorted'
'TDRC' (Recording time)                             '2015'
'TIT2' (Title/songname/content description)         'Let It Go (Original Mix)'
'TKEY' (Initial key)                                '11A'
'TPE1' (Lead performer(s)/Soloist(s))               'Lena Lindbergh'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:Tagging time'                                 '2016-12-02T09:22:06'
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.64 dB'
'TXXX:replaygain_track_peak'                        '0.528228'

========================== row from database ==========================
                                              'id'  1304907
                                            'path'  /data/Music/Bulk/00poprockelectronic/Marvin & Guy - 2015-2016/Lena Lindbergh - Let It Go (Original Mix).mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  416
                                           'genre'  electronic-unsorted
                                        'filesize'  16826249
                                           'mtime'  1620571062
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Marvin & Guy 2015 2016 electronic unsorted
                                      'tag_artist'  Lena Lindbergh
                                     'tag_release'  Nachtwandler 12 (Deep Electronic House)
                                       'tag_title'  Let It Go (Original Mix)
                                             'bpm'  123.0
                                    'search_title'  'go':3 'it':2 'let':1 'mix':6,7 'original':4,5
                                   'search_artist'  'lena':1 'lindbergh':2
                                  'search_release'  'deep':2,3 'electronic':4 'house':5,6 'nachtwandler':1
                                     'search_rest'  '00poprockelectronic':1 '2015':4 '2016':5 'electronic':6 'guy':3 'marvin':2 'unsorted':7
                                    'search_combo'  '00poprockelectronic':16 '2015':19 '2016':20 'deep':11C,12C 'electronic':13C,21 'go':3A 'guy':18 'house':14C,15C 'it':2A 'lena':8B 'let':1A 'lindbergh':9B 'marvin':17 'mix':6A,7A 'nachtwandler':10C 'original':4A,5A 'unsorted':22
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  11A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-3', 'q-chart-2', 'q-other-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  2015
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620571062.2021115  (2021-05-09 16:37:42)
                             'size'  16826249