======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '165'
                                          'artist'  'Ada Jones & Len Spencer'
                                     'text_people'  ''
                                         'release'  'Victor  4474 (16528)'
                                           'title'  "Katrina's Valentine"
                                           '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-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jewish', 'vaudeville', 'cylinder', 'musical', 'early recordings']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1905'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '130.903'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Victor  4474 (16528)'
'TBPM' (BPM (beats per minute))                     '130.903'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1905'
'TIT2' (Title/songname/content description)         "Katrina's Valentine"
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Ada Jones & Len Spencer'
'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:lastfmtags'                                   ['jewish', 'vaudeville', 'cylinder', 'musical', 'early recordings']
'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'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.97 dB'
'TXXX:replaygain_track_peak'                        '0.823090'

========================== row from database ==========================
                                              'id'  1522318
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1905/Ada Jones & Len Spencer - Katrina_s Valentine 1905.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  165
                                           'genre'  prerock-vocal
                                        'filesize'  3307314
                                           'mtime'  1620665875
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1905 Katrina_s 1905 prerock vocal
                                      'tag_artist'  Ada Jones & Len Spencer
                                     'tag_release'  Victor  4474 (16528)
                                       'tag_title'  Katrina's Valentine
                                             'bpm'  130.903
                                    'search_title'  'katrina':1 'katrinas':3 's':2 'valentine':4
                                   'search_artist'  'ada':1 'jones':2 'len':3 'spencer':4
                                  'search_release'  '16528':3,4 '4474':2 'victor':1
                                     'search_rest'  '00oldiepop':5 '1905':6 'country':4 'exotica':2 'jazz':1 'katrina':7 'oldies':3 'prerock':9 's':8 'vocal':10
                                    'search_combo'  '00oldiepop':17 '16528':11C,12C '1905':18 '4474':10C 'ada':5B 'country':16 'exotica':14 'jazz':13 'jones':6B 'katrina':1A,19 'katrinas':3A 'len':7B 'oldies':15 'prerock':21 's':2A,20 'spencer':8B 'valentine':4A 'victor':9C 'vocal':22
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['jewish', 'vaudeville', 'cylinder', 'musical', 'early recordings']
                                        'tag_date'  1905
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620665874.6435528  (2021-05-10 18:57:54)
                             'size'  3307314