======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '252'
                                          'artist'  'Ella Fitzgerald'
                                     'text_people'  ''
                                         'release'  'Ken Burns Jazz'
                                           'title'  "Let's Call the Whole Thing Off"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-2', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['blues', 'jazz', 'female vocalists', 'jazz vocal', 'swing']"
                                     'discogstags'  "['jazz', 'bop', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '09'
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '119.688'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Ken Burns Jazz'
'TBPM' (BPM (beats per minute))                     '119.688'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         "Let's Call the Whole Thing Off"
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Ella Fitzgerald'
'TRCK' (Track number/Position in set)               '09'
'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:discogstags'                                  ['jazz', 'bop', 'swing']
'TXXX:lastfmtags'                                   ['blues', 'jazz', 'female vocalists', 'jazz vocal', 'swing']
'TXXX:original release date'                        ['2000', '2000']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.78 dB'
'TXXX:replaygain_track_peak'                        '0.747884'

========================== row from database ==========================
                                              'id'  1502183
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Ella Fitzgerald/MBZ;#Ella Fitzgerald;#Ken Burns Jazz;#09;#Let_s Call the Whole Thing Off.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  252
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  4036203
                                           'mtime'  1620528657
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country MBZ;#Ella Fitzgerald;#Ken Jazz;#09;#Let_s prerock jb jazz unsorted
                                      'tag_artist'  Ella Fitzgerald
                                     'tag_release'  Ken Burns Jazz
                                       'tag_title'  Let's Call the Whole Thing Off
                                             'bpm'  119.688
                                    'search_title'  'call':4 'let':1 'lets':3 'off':8 's':2 'the':5 'thing':7 'whole':6
                                   'search_artist'  'ella':1 'fitzgerald':2
                                  'search_release'  'burns':2 'jazz':3 'ken':1
                                     'search_rest'  '09':14,18 'country':4 'ella':6,8 'exotica':2 'fitzgerald':9,11 'jazz':1,13,17 'jb':22 'ken':10,12 'let':15,19 'mbz':5,7 'oldies':3 'prerock':21 's':16,20 'unsorted':23
                                    'search_combo'  '09':27,31 'burns':12C 'call':4A 'country':17 'ella':9B,19,21 'exotica':15 'fitzgerald':10B,22,24 'jazz':13C,14,26,30 'jb':35 'ken':11C,23,25 'let':1A,28,32 'lets':3A 'mbz':18,20 'off':8A 'oldies':16 'prerock':34 's':2A,29,33 'the':5A 'thing':7A 'unsorted':36 'whole':6A
                                    'tag_tracknum'  9
                                      '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-3', 'q-drums-2', 'q-syn-1', 'q-chart-4', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['blues', 'jazz', 'female vocalists', 'jazz vocal', 'swing']
                                        'tag_date'  2000
                                     'discogstags'  ['jazz', 'bop', 'swing']

============================== file details ==============================
                                           'mtime'  1620528657.4882712  (2021-05-09 04:50:57)
                             'size'  4036203