======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '40'
                                          'artist'  '[unknown]'
                                     'text_people'  ''
                                         'release'  'Shirley & Spinoza'
                                           'title'  'ChineseTreeFrog'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-OLDST-3', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-1', "
 "'q-chart-1', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1999'
                                        'comments'  ''
                                           'genre'  'nonmusic-fragments;set-pl-shirleyspinoza;set-pl-mor'
                                             'bpm'  '93.933'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Shirley & Spinoza'
'TBPM' (BPM (beats per minute))                     '93.933'
'TCON' (Content type, a.k.a. Genre)                 ['nonmusic-fragments', 'set-pl-shirleyspinoza', 'set-pl-mor']
'TDRC' (Recording time)                             '1999'
'TIT2' (Title/songname/content description)         'ChineseTreeFrog'
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               '[unknown]'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TXXX:Mp3gain_minmax'                               '078,205'
'TXXX:Mp3gain_undo'                                 '+005,+005,N'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:Sortunder'                                    'v'
'TXXX:other'                                        '0004'
'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'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '1'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+4.24 dB'
'TXXX:replaygain_track_peak'                        '0.380352'

========================== row from database ==========================
                                              'id'  986832
                                            'path'  /data/Music/Bulk/sns/VoiceOfNatureInTaiwansForest__ChineseTreeFrog_0004.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  40
                                           'genre'  nonmusic-fragments;set-pl-shirleyspinoza;set-pl-mor
                                        'filesize'  649496
                                           'mtime'  1621630406
                                   'redo_metaread'  0
                                        'rest_str'   sns VoiceOfNatureInTaiwansForest__ChineseTreeFrog_0004 nonmusic fragments;set pl shirleyspinoza;set pl mor
                                      'tag_artist'  [unknown]
                                     'tag_release'  Shirley & Spinoza
                                       'tag_title'  ChineseTreeFrog
                                             'bpm'  93.933
                                    'search_title'  'chinese':2 'chinesetreefrog':1 'frog':4 'tree':3
                                   'search_artist'  'unknown':1,2
                                  'search_release'  'shirley':1 'spinoza':2
                                     'search_rest'  '0004':4,25 'chinese':22 'chinesetreefrog':3 'forest':21 'fragments':6,8 'frog':24 'in':19 'mor':15 'nature':18 'nonmusic':5 'of':17 'pl':10 'set':7,9,12,14 'shirleyspinoza':11,13 'sns':1 'taiwans':20 'tree':23 'voice':16 'voiceofnatureintaiwansforest':2
                                    'search_combo'  '0004':12,33 'chinese':2A,30 'chinesetreefrog':1A,11 'forest':29 'fragments':14,16 'frog':4A,32 'in':27 'mor':23 'nature':26 'nonmusic':13 'of':25 'pl':18 'set':15,17,20,22 'shirley':7C 'shirleyspinoza':19,21 'sns':9 'spinoza':8C 'taiwans':28 'tree':3A,31 'unknown':5B,6B 'voice':24 'voiceofnatureintaiwansforest':10
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-1', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['mysterious', 'unknown', 'all', 'mistagged artist', 'rock']
                                        'tag_date'  1999
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621630405.577126  (2021-05-21 22:53:25)
                             'size'  649496