======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '189'
                                          'artist'  'Franz Mika'
                                     'text_people'  ''
                                         'release'  '[non-album tracks]'
                                           'title'  'Beim Heurigen In Ottakring (+ Drechsler Schrammelbegleitung Pischinger)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['schellack schatz', 'volksmusik']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1920'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '89.217'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '[non-album tracks]'
'TBPM' (BPM (beats per minute))                     '89.217'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1920'
'TIT2' (Title/songname/content description)         'Beim Heurigen In Ottakring (+ Drechsler Schrammelbegleitung Pischinger)'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Franz Mika'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['schellack schatz', 'volksmusik']
'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'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.91 dB'
'TXXX:replaygain_track_peak'                        '0.474082'

========================== row from database ==========================
                                              'id'  1444131
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920/Franz Mika - Beim Heurigen In Ottakring (+ Drechsler Schrammelbegleitung Pischinger) 1920.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  189
                                           'genre'  prerock-unsorted
                                        'filesize'  3788594
                                           'mtime'  1621697839
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920 1920 prerock unsorted
                                      'tag_artist'  Franz Mika
                                     'tag_release'  [non-album tracks]
                                       'tag_title'  Beim Heurigen In Ottakring (+ Drechsler Schrammelbegleitung Pischinger)
                                             'bpm'  89.217
                                    'search_title'  'beim':1 'drechsler':5 'heurigen':2 'in':3 'ottakring':4 'pischinger':7,8 'schrammelbegleitung':6
                                   'search_artist'  'franz':1 'mika':2
                                  'search_release'  'album':2 'non':1 'nonalbum':3 'tracks':4,5
                                     'search_rest'  '00oldiepop':5 '1920':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':7 'unsorted':8
                                    'search_combo'  '00oldiepop':20 '1920':21 'album':12C 'beim':1A 'country':19 'drechsler':5A 'exotica':17 'franz':9B 'heurigen':2A 'in':3A 'jazz':16 'mika':10B 'non':11C 'nonalbum':13C 'oldies':18 'ottakring':4A 'pischinger':7A,8A 'prerock':22 'schrammelbegleitung':6A 'tracks':14C,15C 'unsorted':23
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  3A
                                           '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-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['schellack schatz', 'volksmusik']
                                        'tag_date'  1920
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621697838.9983213  (2021-05-22 17:37:18)
                             'size'  3788594