======================== unified (from filesystem) ========================
                                         'bitrate'  '96.0'
                                        'duration'  '125'
                                          'artist'  'Edison Gold Moulded cylinder 8327'
                                     'text_people'  ''
                                         'release'  'Popular Instrumental, Ragtime'
                                           'title'  'Arbucklenian 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-1', 'q-other-4', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1903'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '143.619'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Popular Instrumental, Ragtime'
'TBPM' (BPM (beats per minute))                     '143.619'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1903'
'TIT2' (Title/songname/content description)         'Arbucklenian polka'
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'Classic Recordings'
'TPE2' (Band/orchestra/accompaniment)               'Edison Gold Moulded cylinder 8327'
'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'                                      '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'                                     '2'
'TXXX:replaygain_track_gain'                        '+3.89 dB'
'TXXX:replaygain_track_peak'                        '0.356479'

========================== row from database ==========================
                                              'id'  1120731
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Popular Songs, Tin Pan Alley/Classic Recordings - Arbucklenian polka.mp3
                                         'working'  None
                                         'bitrate'  96
                                    'duration_sec'  125
                                           'genre'  prerock-unsorted
                                        'filesize'  1507558
                                           'mtime'  1621698439
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Songs, Tin Pan Alley Classic Recordings prerock unsorted
                                      'tag_artist'  Edison Gold Moulded cylinder 8327
                                     'tag_release'  Popular Instrumental, Ragtime
                                       'tag_title'  Arbucklenian polka
                                             'bpm'  143.619
                                    'search_title'  'arbucklenian':1 'polka':2
                                   'search_artist'  '8327':5 'cylinder':4 'edison':1 'gold':2 'moulded':3
                                  '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'  '8327':7B 'alley':20 'arbucklenian':1A 'classic':21 'country':15 'cylinder':6B 'edison':3B 'exotica':13 'gold':4B 'instrumental':9C,10C 'jazz':12 'moulded':5B 'oldies':14 'pan':19 'polka':2A 'popular':8C 'prerock':23 'ragtime':11C 'recordings':22 'songs':16,17 'tin':18 'unsorted':24
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', '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-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1903
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621698438.6043823  (2021-05-22 17:47:18)
                             'size'  1507558