======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '141'
                                          'artist'  'Ella Mae Morse'
                                     'text_people'  ''
                                         'release'  'Capitol  2658'
                                           'title'  "It Ain't Necessarily So"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-LOCALNESS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz vocal', 'blues', 'jazz', 'female vocalists', '50s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1953'
                                        'comments'  ''
                                           'genre'  'prerock-jb-unsorted'
                                             'bpm'  '122.585'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Capitol  2658'
'TBPM' (BPM (beats per minute))                     '122.585'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-unsorted'
'TDRC' (Recording time)                             '1953'
'TIT2' (Title/songname/content description)         "It Ain't Necessarily So"
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'Ella Mae Morse'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['jazz vocal', 'blues', 'jazz', 'female vocalists', '50s']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'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'                        '+1.66 dB'
'TXXX:replaygain_track_peak'                        '0.466147'

========================== row from database ==========================
                                              'id'  1517280
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1953/Ella Mae Morse - It Ain_t Necessarily So 1953.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  141
                                           'genre'  prerock-jb-unsorted
                                        'filesize'  2834226
                                           'mtime'  1620527667
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1953 Ain_t 1953 prerock jb unsorted
                                      'tag_artist'  Ella Mae Morse
                                     'tag_release'  Capitol  2658
                                       'tag_title'  It Ain't Necessarily So
                                             'bpm'  122.585
                                    'search_title'  'ain':2 'aint':4 'it':1 'necessarily':5 'so':6 't':3
                                   'search_artist'  'ella':1 'mae':2 'morse':3
                                  'search_release'  '2658':2 'capitol':1
                                     'search_rest'  '00oldiepop':5 '1953':6 'ain':7 'country':4 'exotica':2 'jazz':1 'jb':10 'oldies':3 'prerock':9 't':8 'unsorted':11
                                    'search_combo'  '00oldiepop':16 '1953':17 '2658':11C 'ain':2A,18 'aint':4A 'capitol':10C 'country':15 'ella':7B 'exotica':13 'it':1A 'jazz':12 'jb':21 'mae':8B 'morse':9B 'necessarily':5A 'oldies':14 'prerock':20 'so':6A 't':3A,19 'unsorted':22
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['jazz vocal', 'blues', 'jazz', 'female vocalists', '50s']
                                        'tag_date'  1953
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620527666.838945  (2021-05-09 04:34:26)
                             'size'  2834226