======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '216'
                                          'artist'  'Naftule Brandwein'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Firn Die Mekhutonim Aheym (+ Abe Schwartz Orchestra)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jewish', 'old klezmer', 'clarinet', 'all', 'klezmer']"
                                     'discogstags'  "['folk, world, & country', 'klezmer']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1923'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '114.999'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '114.999'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1923'
'TIT2' (Title/songname/content description)         'Firn Die Mekhutonim Aheym (+ Abe Schwartz Orchestra)'
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Naftule Brandwein'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['folk, world, & country', 'klezmer']
'TXXX:lastfmtags'                                   ['jewish', 'old klezmer', 'clarinet', 'all', 'klezmer']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'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'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.12 dB'
'TXXX:replaygain_track_peak'                        '0.471561'

========================== row from database ==========================
                                              'id'  1433820
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1923/Naftule Brandwein - Firn Die Mekhutonim Aheym (+ Abe Schwartz Orch) 1923.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  216
                                           'genre'  prerock-band
                                        'filesize'  4329268
                                           'mtime'  1620559873
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1923 Orch) 1923 prerock band
                                      'tag_artist'  Naftule Brandwein
                                     'tag_release'  None
                                       'tag_title'  Firn Die Mekhutonim Aheym (+ Abe Schwartz Orchestra)
                                             'bpm'  114.999
                                    'search_title'  'abe':5 'aheym':4 'die':2 'firn':1 'mekhutonim':3 'orchestra':7,8 'schwartz':6
                                   'search_artist'  'brandwein':2 'naftule':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1923':6 'band':10 'country':4 'exotica':2 'jazz':1 'oldies':3 'orch':7,8 'prerock':9
                                    'search_combo'  '00oldiepop':15 '1923':16 'abe':5A 'aheym':4A 'band':20 'brandwein':10B 'country':14 'die':2A 'exotica':12 'firn':1A 'jazz':11 'mekhutonim':3A 'naftule':9B 'oldies':13 'orch':17,18 'orchestra':7A,8A 'prerock':19 'schwartz':6A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10B
                                           '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-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['jewish', 'old klezmer', 'clarinet', 'all', 'klezmer']
                                        'tag_date'  1923
                                     'discogstags'  ['folk, world, & country', 'klezmer']

============================== file details ==============================
                                           'mtime'  1620559873.3806636  (2021-05-09 13:31:13)
                             'size'  4329268