======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '255'
                                          'artist'  'Ella Fitzgerald'
                                     'text_people'  ''
                                         'release'  'Jazz Legends'
                                           'title'  "It Don't Mean A Thing (If It Ain't got that Swing)"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-1', 'q-play-3', "
 "'q-chart-4', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['blues', 'jazz', 'female vocalists', 'jazz vocal', 'swing']"
                                     'discogstags'  "['swing', 'big band', 'easy listening', 'jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '02'
                                      'tracktotal'  ''
                                            'date'  '1940'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '97.132'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Jazz Legends'
'TBPM' (BPM (beats per minute))                     '97.132'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1940'
'TIT2' (Title/songname/content description)         "It Don't Mean A Thing (If It Ain't got that Swing)"
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Ella Fitzgerald'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '02'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['swing', 'big band', 'easy listening', 'jazz']
'TXXX:lastfmtags'                                   ['blues', 'jazz', 'female vocalists', 'jazz vocal', 'swing']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.81 dB'
'TXXX:replaygain_track_peak'                        '0.692542'

========================== row from database ==========================
                                              'id'  1517371
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00jazzes/[2000] Jazz Legends/Ella Fitzgerald - 02 - It Don_t Mean A Thing (If It A.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  255
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  6140558
                                           'mtime'  1620524021
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00jazzes [2000] 02 Don_t prerock jb jazz unsorted
                                      'tag_artist'  Ella Fitzgerald
                                     'tag_release'  Jazz Legends
                                       'tag_title'  It Don't Mean A Thing (If It Ain't got that Swing)
                                             'bpm'  97.132
                                    'search_title'  'a':6 'ain':10 'aint':12 'don':2 'dont':4 'got':13 'if':8,9 'it':1 'mean':5 'swing':15,16 't':3,11 'that':14 'thing':7
                                   'search_artist'  'ella':1 'fitzgerald':2
                                  'search_release'  'jazz':1 'legends':2
                                     'search_rest'  '00jazzes':5 '2000':6,7 'country':4 'don':8 'exotica':2 'jazz':1 'jb':11 'oldies':3 'prerock':10 't':9 'unsorted':12
                                    'search_combo'  '00jazzes':25 '2000':26,27 'a':6A 'ain':10A 'aint':12A 'country':24 'don':2A,28 'dont':4A 'ella':17B 'exotica':22 'fitzgerald':18B 'got':13A 'if':8A,9A 'it':1A 'jazz':19C,21 'jb':31 'legends':20C 'mean':5A 'oldies':23 'prerock':30 'swing':15A,16A 't':3A,11A,29 'that':14A 'thing':7A 'unsorted':32
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-4', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['blues', 'jazz', 'female vocalists', 'jazz vocal', 'swing']
                                        'tag_date'  1940
                                     'discogstags'  ['swing', 'big band', 'easy listening', 'jazz']

============================== file details ==============================
                                           'mtime'  1620524020.776834  (2021-05-09 03:33:40)
                             'size'  6140558