======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '152'
                                          'artist'  'Saxophon-Orchester Dobbri mit Gesang'
                                     'text_people'  ''
                                         'release'  'tango in europe'
                                           'title'  "S|  singt die Geige ''Gut' Nacht''"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-UNU-2', 'Q-LOCALNESS-3', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1929'
                                        'comments'  ''
                                           'genre'  'loc-style-tango or milonga'
                                             'bpm'  '114.156'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'tango in europe'
'TBPM' (BPM (beats per minute))                     '114.156'
'TCON' (Content type, a.k.a. Genre)                 'loc-style-tango or milonga'
'TDRC' (Recording time)                             '1929'
'TIT2' (Title/songname/content description)         "S|  singt die Geige ''Gut' Nacht''"
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Saxophon-Orchester Dobbri mit Gesang'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+3.23 dB'
'TXXX:replaygain_track_peak'                        '0.485717'

========================== row from database ==========================
                                              'id'  1511566
                                            'path'  /data/Music/Bulk/00localcharacter/tango in europe (various)/Otto Dobrindt Orchester u. Max Mensing - Süß singt die Geige __Gut_ Nacht__ (1929).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  152
                                           'genre'  loc-style-tango or milonga
                                        'filesize'  2434570
                                           'mtime'  1620528490
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter (various) Otto Dobrindt u. Max Mensing Süß __Gut_ Nacht__ (1929) loc style or milonga
                                      'tag_artist'  Saxophon-Orchester Dobbri mit Gesang
                                     'tag_release'  tango in europe
                                       'tag_title'  S|  singt die Geige ''Gut' Nacht''
                                             'bpm'  114.156
                                    'search_title'  'die':3 'geige':4 'gut':5,6 'nacht':7,8 's':1 'singt':2
                                   'search_artist'  'dobbri':4 'gesang':6 'mit':5 'orchester':2 'saxophon':1 'saxophonorchester':3
                                  'search_release'  'europe':3 'in':2 'tango':1
                                     'search_rest'  '1929':13,14 'dobrindt':4 'gut':11 'loc':15 'max':7 'mensing':8 'milonga':18 'nacht':12 'or':17 'otto':3 'style':16 'suss':10 'suß':9 'u':5,6 'various':1,2
                                    'search_combo'  '1929':30,31 'die':3A 'dobbri':12B 'dobrindt':21 'europe':17C 'geige':4A 'gesang':14B 'gut':5A,6A,28 'in':16C 'loc':32 'max':24 'mensing':25 'milonga':35 'mit':13B 'nacht':7A,8A,29 'or':34 'orchester':10B 'otto':20 's':1A 'saxophon':9B 'saxophonorchester':11B 'singt':2A 'style':33 'suss':27 'suß':26 'tango':15C 'u':22,23 'various':18,19
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1929
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620528490.0762987  (2021-05-09 04:48:10)
                             'size'  2434570