======================== unified (from filesystem) ========================
                                         'bitrate'  '77.88'
                                        'duration'  '176'
                                          'artist'  'Quatuor Oberg, accordion, picc'
                                     'text_people'  ''
                                         'release'  'Shirley & Spinoza'
                                           'title'  'Ha! ha! ha! polka'
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', 'q-chart-1', "
 "'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-2', 'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1930'
                                        'comments'  ''
                                           'genre'  'set-pl-shirleyspinoza;set-pl-mor'
                                             'bpm'  '87.977'
                                             'key'  '5B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            ') www.nlc-bnc.ca'
'TALB' (Album/Movie/Show title)                     'Shirley & Spinoza'
'TBPM' (BPM (beats per minute))                     '87.977'
'TCON' (Content type, a.k.a. Genre)                 ['set-pl-shirleyspinoza', 'set-pl-mor']
'TDRC' (Recording time)                             '1930'
'TIT2' (Title/songname/content description)         'Ha! ha! ha! polka'
'TKEY' (Initial key)                                '5B'
'TPE1' (Lead performer(s)/Soloist(s))               'Quatuor Oberg, accordion, picc'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+2.26 dB'
'TXXX:replaygain_track_peak'                        '0.477143'

========================== row from database ==========================
                                              'id'  948984
                                            'path'  /data/Music/Bulk/sns/Grammophone - Hahaha Polka.mp3
                                         'working'  None
                                         'bitrate'  77
                                    'duration_sec'  176
                                           'genre'  set-pl-shirleyspinoza;set-pl-mor
                                        'filesize'  1720961
                                           'mtime'  1636301114
                                   'redo_metaread'  0
                                        'rest_str'   sns Grammophone Hahaha Polka set pl shirleyspinoza;set pl mor
                                      'tag_artist'  Quatuor Oberg, accordion, picc
                                     'tag_release'  Shirley & Spinoza
                                       'tag_title'  Ha! ha! ha! polka
                                             'bpm'  87.977
                                    'search_title'  'ha':1 'polka':2
                                   'search_artist'  'accordion':4,5 'oberg':2,3 'picc':6 'quatuor':1
                                  'search_release'  'shirley':1 'spinoza':2
                                     'search_rest'  'grammophone':2 'hahaha':3 'mor':11 'pl':6 'polka':4 'set':5,8,10 'shirleyspinoza':7,9 'sns':1
                                    'search_combo'  'accordion':6B,7B 'grammophone':12 'ha':1A 'hahaha':13 'mor':21 'oberg':4B,5B 'picc':8B 'pl':16 'polka':2A,14 'quatuor':3B 'set':15,18,20 'shirley':9C 'shirleyspinoza':17,19 'sns':11 'spinoza':10C
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  5B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1930
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636301113.8873582  (2021-11-07 17:05:13)
                             'size'  1720961