======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '169'
                                          'artist'  'Ella Fitzgerald'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "I Can't Go On Without You"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-3', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['blues', 'jazz', 'female vocalists', 'jazz vocal', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1948'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '140.044'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '140.044'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1948'
'TIT2' (Title/songname/content description)         "I Can't Go On Without You"
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Ella Fitzgerald'
'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'                                   ['blues', 'jazz', 'female vocalists', 'jazz vocal', 'swing']
'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'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.86 dB'
'TXXX:replaygain_track_peak'                        '0.473453'

========================== row from database ==========================
                                              'id'  1521875
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1948/Ella Fitzgerald - I Can_t Go On (Without You) 20-8-1948.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  169
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  3397314
                                           'mtime'  1620527553
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1948 Can_t (Without You) 20 8 1948 prerock jb jazz unsorted
                                      'tag_artist'  Ella Fitzgerald
                                     'tag_release'  None
                                       'tag_title'  I Can't Go On Without You
                                             'bpm'  140.044
                                    'search_title'  'can':2 'cant':4 'go':5 'i':1 'on':6 't':3 'without':7 'you':8
                                   'search_artist'  'ella':1 'fitzgerald':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1948':6 '20':13 '8':14 'can':7 'country':4 'exotica':2 'jazz':1 'jb':16 'oldies':3 'prerock':15 't':8 'unsorted':17 'without':9,10 'you':11,12
                                    'search_combo'  '00oldiepop':15 '1948':16 '20':23 '8':24 'can':2A,17 'cant':4A 'country':14 'ella':9B 'exotica':12 'fitzgerald':10B 'go':5A 'i':1A 'jazz':11 'jb':26 'oldies':13 'on':6A 'prerock':25 't':3A,18 'unsorted':27 'without':7A,19,20 'you':8A,21,22
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', '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-1', 'q-grit-1']
                                      'lastfmtags'  ['blues', 'jazz', 'female vocalists', 'jazz vocal', 'swing']
                                        'tag_date'  1948
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620527553.2540035  (2021-05-09 04:32:33)
                             'size'  3397314