======================== unified (from filesystem) ========================
                                         'bitrate'  '96.0'
                                        'duration'  '149'
                                          'artist'  'Edison Concert cylinder B-473'
                                     'text_people'  ''
                                         'release'  'Popular Instrumental, Ragtime'
                                           'title'  'Dinah polka'
                                           '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-3', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1900'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '89.691'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Popular Instrumental, Ragtime'
'TBPM' (BPM (beats per minute))                     '89.691'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1900'
'TIT2' (Title/songname/content description)         'Dinah polka'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Classic Recordings'
'TPE2' (Band/orchestra/accompaniment)               'Edison Concert cylinder B-473'
'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:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'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'                        '+1.10 dB'
'TXXX:replaygain_track_peak'                        '0.586701'

========================== row from database ==========================
                                              'id'  1120707
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Popular Songs, Tin Pan Alley/Classic Recordings - Dinah polka.mp3
                                         'working'  None
                                         'bitrate'  96
                                    'duration_sec'  149
                                           'genre'  prerock-unsorted
                                        'filesize'  1802262
                                           'mtime'  1621698439
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Songs, Tin Pan Alley Classic Recordings prerock unsorted
                                      'tag_artist'  Edison Concert cylinder B-473
                                     'tag_release'  Popular Instrumental, Ragtime
                                       'tag_title'  Dinah polka
                                             'bpm'  89.691
                                    'search_title'  'dinah':1 'polka':2
                                   'search_artist'  '473':5 'b':4 'b473':6 'concert':2 'cylinder':3 'edison':1
                                  'search_release'  'instrumental':2,3 'popular':1 'ragtime':4
                                     'search_rest'  'alley':9 'classic':10 'country':4 'exotica':2 'jazz':1 'oldies':3 'pan':8 'prerock':12 'recordings':11 'songs':5,6 'tin':7 'unsorted':13
                                    'search_combo'  '473':7B 'alley':21 'b':6B 'b473':8B 'classic':22 'concert':4B 'country':16 'cylinder':5B 'dinah':1A 'edison':3B 'exotica':14 'instrumental':10C,11C 'jazz':13 'oldies':15 'pan':20 'polka':2A 'popular':9C 'prerock':24 'ragtime':12C 'recordings':23 'songs':17,18 'tin':19 'unsorted':25
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', '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-3', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1900
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621698438.6078317  (2021-05-22 17:47:18)
                             'size'  1802262