======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '182'
                                          'artist'  'Tango-Kapelle Juan Campos mit Kurt Hardt'
                                     'text_people'  'Walter Jurmann / Bernauer / Oesterreicher'
                                         'release'  'tango in europe'
                                           'title'  'Du bist nicht die Erste'
                                           '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-4', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1930'
                                        'comments'  ''
                                           'genre'  'loc-style-tango or milonga'
                                             'bpm'  '114.479'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'tango in europe'
'TBPM' (BPM (beats per minute))                     '114.479'
'TCOM' (Composer)                                   'Walter Jurmann / Bernauer / Oesterreicher'
'TCON' (Content type, a.k.a. Genre)                 'loc-style-tango or milonga'
'TDRC' (Recording time)                             '1930'
'TIT2' (Title/songname/content description)         'Du bist nicht die Erste'
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Tango-Kapelle Juan Campos mit Kurt Hardt'
'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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.50 dB'
'TXXX:replaygain_track_peak'                        '0.676593'

========================== row from database ==========================
                                              'id'  851320
                                            'path'  /data/Music/Bulk/00localcharacter/tango in europe (various)/Tango-Kapelle Juan Campos mit Kurt Hardt - Du bist nicht die Erste (1930).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  182
                                           'genre'  loc-style-tango or milonga
                                        'filesize'  2919949
                                           'mtime'  1620528504
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter (various) (1930) loc style or milonga
                                      'tag_artist'  Tango-Kapelle Juan Campos mit Kurt Hardt
                                     'tag_release'  tango in europe
                                       'tag_title'  Du bist nicht die Erste
                                             'bpm'  114.479
                                    'search_title'  'bist':2 'die':4 'du':1 'erste':5 'nicht':3
                                   'search_artist'  'campos':5 'hardt':8 'juan':4 'kapelle':2 'kurt':7 'mit':6 'tango':1 'tangokapelle':3
                                  'search_release'  'europe':3 'in':2 'tango':1
                                     'search_rest'  '1930':3,4 'loc':5 'milonga':8 'or':7 'style':6 'various':1,2
                                    'search_combo'  '1930':19,20 'bist':2A 'campos':10B 'die':4A 'du':1A 'erste':5A 'europe':16C 'hardt':13B 'in':15C 'juan':9B 'kapelle':7B 'kurt':12B 'loc':21 'milonga':24 'mit':11B 'nicht':3A 'or':23 'style':22 'tango':6B,14C 'tangokapelle':8B 'various':17,18
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7B
                                           '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-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1930
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620528504.2922418  (2021-05-09 04:48:24)
                             'size'  2919949