======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '163'
                                          'artist'  'Felix Arndt'
                                     'text_people'  ''
                                         'release'  '[non-album tracks]'
                                           'title'  'Nola'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'Q-PLAY-2', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'Q-PIANO-4', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-vocals-1', 'q-mixbeat-1']")
                                      'lastfmtags'  "['spotify', 'ragtime', 'piano', 'novelty ragtime', 'drehorgel']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1916'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '95.890'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '[non-album tracks]'
'TBPM' (BPM (beats per minute))                     '95.890'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1916'
'TIT2' (Title/songname/content description)         'Nola'
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Felix Arndt'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['spotify', 'ragtime', 'piano', 'novelty ragtime', 'drehorgel']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.27 dB'
'TXXX:replaygain_track_peak'                        '0.704799'

========================== row from database ==========================
                                              'id'  1438211
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1916/Felix Arndt - Nola (piano solo) 30-3-1916.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  163
                                           'genre'  prerock-unsorted
                                        'filesize'  3266354
                                           'mtime'  1620573895
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1916 (piano solo) 30 3 1916 prerock unsorted
                                      'tag_artist'  Felix Arndt
                                     'tag_release'  [non-album tracks]
                                       'tag_title'  Nola
                                             'bpm'  95.89
                                    'search_title'  'nola':1
                                   'search_artist'  'arndt':2 'felix':1
                                  'search_release'  'album':2 'non':1 'nonalbum':3 'tracks':4,5
                                     'search_rest'  '00oldiepop':5 '1916':6 '3':12 '30':11 'country':4 'exotica':2 'jazz':1 'oldies':3 'piano':7,8 'prerock':13 'solo':9,10 'unsorted':14
                                    'search_combo'  '00oldiepop':13 '1916':14 '3':20 '30':19 'album':5C 'arndt':3B 'country':12 'exotica':10 'felix':2B 'jazz':9 'nola':1A 'non':4C 'nonalbum':6C 'oldies':11 'piano':15,16 'prerock':21 'solo':17,18 'tracks':7C,8C 'unsorted':22
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-4', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-PLAY-2', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['spotify', 'ragtime', 'piano', 'novelty ragtime', 'drehorgel']
                                        'tag_date'  1916
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620573895.0069354  (2021-05-09 17:24:55)
                             'size'  3266354