======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '241'
                                          'artist'  'Nederlands'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Niet of nooit geweest'
                                           'quals'  ("['Q-JZFKS-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-UNU-1', "
 "'q-syn-2', 'Q-PLAY-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'Q-PIANO-2', "
 "'q-chart-3', 'q-drums-2', 'q-other-2', 'q-vocals-4', 'q-mixbeat-2']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1990'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted'
                                             'bpm'  '123.557'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'POPM:unknown@unknown'                              POPM(email='unknown@unknown', rating=255, count=0)
'TBPM' (BPM (beats per minute))                     '123.557'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-unsorted'
'TDRC' (Recording time)                             '1990'
'TIT2' (Title/songname/content description)         'Niet of nooit geweest'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Nederlands'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.15 dB'
'TXXX:replaygain_track_peak'                        '0.610111'

========================== row from database ==========================
                                              'id'  1338194
                                            'path'  /data/Music/Bulk/00poprockelectronic/90s/054 - Acda en de munnik - Niet of nooit geweest.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  241
                                           'genre'  electronic-generic or radio-unsorted
                                        'filesize'  3870118
                                           'mtime'  1620566539
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 90s 054 Acda en munnik electronic generic or radio unsorted
                                      'tag_artist'  Nederlands
                                     'tag_release'  None
                                       'tag_title'  Niet of nooit geweest
                                             'bpm'  123.557
                                    'search_title'  'geweest':4 'niet':1 'nooit':3 'of':2
                                   'search_artist'  'nederlands':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 '90s':2 'acda':3 'electronic':6 'en':4 'generic':7 'munnik':5 'or':8 'radio':9 'unsorted':10
                                    'search_combo'  '00poprockelectronic':6 '90s':7 'acda':8 'electronic':11 'en':9 'generic':12 'geweest':4A 'munnik':10 'nederlands':5B 'niet':1A 'nooit':3A 'of':2A 'or':13 'radio':14 'unsorted':15
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-mixbeat-2', 'Q-PIANO-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-3', 'q-other-2', 'Q-PLAY-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1990
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620566539.4640715  (2021-05-09 15:22:19)
                             'size'  3870118