======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '229'
                                          'artist'  'Natalie Cole'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Miss You Like Crazy(재즈)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-UNU-1', "
 "'Q-OLDST-1', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['female vocalists', 'jazz vocal', 'jazz', 'vocal jazz', 'soul', 'blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '300'
                                      'tracktotal'  ''
                                            'date'  '2008'
                                        'comments'  ''
                                           'genre'  'funk or soul'
                                             'bpm'  '86.882'
                                             'key'  '2B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '86.882'
'TCON' (Content type, a.k.a. Genre)                 'funk or soul'
'TDRC' (Recording time)                             '2008'
'TIT2' (Title/songname/content description)         'Miss You Like Crazy(재즈)'
'TKEY' (Initial key)                                '2B'
'TPE1' (Lead performer(s)/Soloist(s))               'Natalie Cole'
'TPE2' (Band/orchestra/accompaniment)               'Natalie Cole'
'TRCK' (Track number/Position in set)               '300'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['female vocalists', 'jazz vocal', 'jazz', 'vocal jazz', 'soul', 'blues']
'TXXX:other'                                        '가인아 놀자 (밥송 041집)'
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.08 dB'
'TXXX:replaygain_track_peak'                        '0.484127'

========================== row from database ==========================
                                              'id'  1341160
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/가인아 놀자 (밥송 041집) - ♬ 300 Natalie Cole - Miss You Like Crazy(재즈).mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  229
                                           'genre'  funk or soul
                                        'filesize'  5519450
                                           'mtime'  1628357966
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] 가인아 놀자 (밥송 041집) ♬ 300 funk or soul
                                      'tag_artist'  Natalie Cole
                                     'tag_release'  None
                                       'tag_title'  Miss You Like Crazy(재즈)
                                             'bpm'  86.882
                                    'search_title'  'crazy':4,7 'crazy재즈':6,9 'like':3 'miss':1 'you':2 '재즈':5,8
                                   'search_artist'  'cole':2 'natalie':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 '041집':15,16,17,18 '300':19 'files':5,6 'funk':20 'loose':3,4 'or':21 'soul':22 'unsorted':2 '가인아':7,8 '놀자':9,10 '밥송':11,12,13,14
                                    'search_combo'  '00poprockelectronic':12 '041집':26,27,28,29 '300':30 'cole':11B 'crazy':4A,7A 'crazy재즈':6A,9A 'files':16,17 'funk':31 'like':3A 'loose':14,15 'miss':1A 'natalie':10B 'or':32 'soul':33 'unsorted':13 'you':2A '가인아':18,19 '놀자':20,21 '밥송':22,23,24,25 '재즈':5A,8A
                                    'tag_tracknum'  300
                                      'num_images'  0
                                             'key'  2B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['female vocalists', 'jazz vocal', 'jazz', 'vocal jazz', 'soul', 'blues']
                                        'tag_date'  2008
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1628357966.348892  (2021-08-07 19:39:26)
                             'size'  5519450