======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '178'
                                          'artist'  'Orchestre Gramophone Symphonique de Paris'
                                     'text_people'  'U. Toranzo - R. Rossi'
                                         'release'  'tango in europe'
                                           'title'  'Jueves'
                                           '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-1', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1921'
                                        'comments'  ''
                                           'genre'  'loc-style-tango or milonga'
                                             'bpm'  '84.773'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'tango in europe'
'TBPM' (BPM (beats per minute))                     '84.773'
'TCOM' (Composer)                                   'U. Toranzo - R. Rossi'
'TCON' (Content type, a.k.a. Genre)                 'loc-style-tango or milonga'
'TDRC' (Recording time)                             '1921'
'TIT2' (Title/songname/content description)         'Jueves'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Orchestre Gramophone Symphonique de Paris'
'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'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.67 dB'
'TXXX:replaygain_track_peak'                        '0.412354'

========================== row from database ==========================
                                              'id'  851292
                                            'path'  /data/Music/Bulk/00localcharacter/tango in europe (various)/Orchestre Gramophone Symphonique de Paris - Jueves (1921).mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  178
                                           'genre'  loc-style-tango or milonga
                                        'filesize'  7160644
                                           'mtime'  1620528483
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter (various) (1921) loc style or milonga
                                      'tag_artist'  Orchestre Gramophone Symphonique de Paris
                                     'tag_release'  tango in europe
                                       'tag_title'  Jueves
                                             'bpm'  84.773
                                    'search_title'  'jueves':1
                                   'search_artist'  'de':4 'gramophone':2 'orchestre':1 'paris':5 'symphonique':3
                                  'search_release'  'europe':3 'in':2 'tango':1
                                     'search_rest'  '1921':3,4 'loc':5 'milonga':8 'or':7 'style':6 'various':1,2
                                    'search_combo'  '1921':12,13 'de':5B 'europe':9C 'gramophone':3B 'in':8C 'jueves':1A 'loc':14 'milonga':17 'or':16 'orchestre':2B 'paris':6B 'style':15 'symphonique':4B 'tango':7C 'various':10,11
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', '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'  1921
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620528483.3083248  (2021-05-09 04:48:03)
                             'size'  7160644