======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '162'
                                          'artist'  'Kobayashi Asei'
                                     'text_people'  'Kobayashi Asei'
                                         'release'  'Shirley & Spinoza'
                                           'title'  'A Letter in the Past'
                                           'quals'  ("['Q-OLDST-2', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', 'Q-PIANO-3', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-vocals-1', 'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  '12'
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'set-pl-shirleyspinoza;set-pl-mor'
                                             'bpm'  '138.040'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Shirley & Spinoza'
'TBPM' (BPM (beats per minute))                     '138.040'
'TCOM' (Composer)                                   'Kobayashi Asei'
'TCON' (Content type, a.k.a. Genre)                 ['set-pl-shirleyspinoza', 'set-pl-mor']
'TIT2' (Title/songname/content description)         'A Letter in the Past'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Kobayashi Asei'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '6/12'
'TSOA' (Album sort order)                           'Hausu (House) Soundtrack'
'TSOC'                                              'Kobayashi Asei'
'TSOP' (Performer sort order)                       'Kobayashi Asei'
'TSSE' (Software/Hardware and settings used for encoding)  'Lavf57.19.100'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:compatible_brands'                            'iso6mp41'
'TXXX:major_brand'                                  'dash'
'TXXX:minor_version'                                '0'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.71 dB'
'TXXX:replaygain_track_peak'                        '0.570238'

========================== row from database ==========================
                                              'id'  949399
                                            'path'  /data/Music/Bulk/sns/Hausu (House) Soundtrack 06 - A Letter in the Past.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  162
                                           'genre'  set-pl-shirleyspinoza;set-pl-mor
                                        'filesize'  3913728
                                           'mtime'  1621489051
                                   'redo_metaread'  0
                                        'rest_str'   sns Hausu (House) Soundtrack 06 set pl shirleyspinoza;set pl mor
                                      'tag_artist'  Kobayashi Asei
                                     'tag_release'  Shirley & Spinoza
                                       'tag_title'  A Letter in the Past
                                             'bpm'  138.04
                                    'search_title'  'a':1 'in':3 'letter':2 'past':5 'the':4
                                   'search_artist'  'asei':2 'kobayashi':1
                                  'search_release'  'shirley':1 'spinoza':2
                                     'search_rest'  'hausu':2 'house':3,4 'mor':12 'pl':7 'set':6,9,11 'shirleyspinoza':8,10 'sns':1 'soundtrack':5
                                    'search_combo'  'a':1A 'asei':7B 'hausu':11 'house':12,13 'in':3A 'kobayashi':6B 'letter':2A 'mor':21 'past':5A 'pl':16 'set':15,18,20 'shirley':8C 'shirleyspinoza':17,19 'sns':10 'soundtrack':14 'spinoza':9C 'the':4A
                                    'tag_tracknum'  6
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-3', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-1', 'q-other-4', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621489050.518847  (2021-05-20 07:37:30)
                             'size'  3913728