======================== unified (from filesystem) ========================
                                         'bitrate'  '96.0'
                                        'duration'  '161'
                                          'artist'  'Chipmunks'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Alvin's Harmonica"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['christmas', 'chipmunk vocalists', 'comedy', 'kids', 'cartoons']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1959'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '116.053'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '116.053'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1959'
'TIT2' (Title/songname/content description)         "Alvin's Harmonica"
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Chipmunks'
'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'                                   ['christmas', 'chipmunk vocalists', 'comedy', 'kids', 'cartoons']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.58 dB'
'TXXX:replaygain_track_peak'                        '0.347027'
'UFID:'                                             UFID(owner='', data=b'XL\x00 CH1959_001')

========================== row from database ==========================
                                              'id'  1507128
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1959/ch1959_001 - chipmunks - alvin_s harmonica 96 m (2.42).mp3
                                         'working'  None
                                         'bitrate'  96
                                    'duration_sec'  161
                                           'genre'  prerock-unsorted
                                        'filesize'  1947520
                                           'mtime'  1621698432
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1959 ch1959_001 chipmunks alvin_s harmonica 96 (2.42) prerock unsorted
                                      'tag_artist'  Chipmunks
                                     'tag_release'  None
                                       'tag_title'  Alvin's Harmonica
                                             'bpm'  116.053
                                    'search_title'  'alvin':1 'alvins':3 'harmonica':4 's':2
                                   'search_artist'  'chipmunks':1
                                  'search_release'  
                                     'search_rest'  '001':8 '00oldiepop':5 '1959':6 '2':14 '242':16 '42':15 '96':13 'alvin':10 'ch1959':7 'chipmunks':9 'country':4 'exotica':2 'harmonica':12 'jazz':1 'oldies':3 'prerock':17 's':11 'unsorted':18
                                    'search_combo'  '001':13 '00oldiepop':10 '1959':11 '2':19 '242':21 '42':20 '96':18 'alvin':1A,15 'alvins':3A 'ch1959':12 'chipmunks':5B,14 'country':9 'exotica':7 'harmonica':4A,17 'jazz':6 'oldies':8 'prerock':22 's':2A,16 'unsorted':23
                                    '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-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['christmas', 'chipmunk vocalists', 'comedy', 'kids', 'cartoons']
                                        'tag_date'  1959
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621698432.444  (2021-05-22 17:47:12)
                             'size'  1947520