======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '225'
                                          'artist'  'Ada Jones'
                                     'text_people'  ''
                                         'release'  'Edison (4713-C-1-1)'
                                           'title'  "You Can Tell That I'm Irish"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['gramophone', 'female vocalists', 'tin pan alley', 'vocal', 'all']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1900'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '129.8'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Edison (4713-C-1-1)'
'TBPM' (BPM (beats per minute))                     '129.8'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1900'
'TIT2' (Title/songname/content description)         "You Can Tell That I'm Irish"
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Ada Jones'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['gramophone', 'female vocalists', 'tin pan alley', 'vocal', 'all']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.05 dB'
'TXXX:replaygain_track_peak'                        '0.791732'

========================== row from database ==========================
                                              'id'  1498143
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Wax Cylinder／very old recordings： 1878-1920 [wma／32k]/Ada Jones - You Can Tell That I_m Irish.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  225
                                           'genre'  prerock-vocal
                                        'filesize'  3607487
                                           'mtime'  1621853379
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Wax Cylinder／very old recordings： 1878 1920 [wma／32k] I_m prerock vocal
                                      'tag_artist'  Ada Jones
                                     'tag_release'  Edison (4713-C-1-1)
                                       'tag_title'  You Can Tell That I'm Irish
                                             'bpm'  129.8
                                    'search_title'  'can':2 'i':5 'im':7 'irish':8 'm':6 'tell':3 'that':4 'you':1
                                   'search_artist'  'ada':1 'jones':2
                                  'search_release'  '1':4,5 '4713':2 '4713c11':6 'c':3 'edison':1
                                     'search_rest'  '1878':11 '1920':12 '32k':14,16,18 'cylinder':2,4 'cylindervery':6 'i':20 'm':21 'old':7 'prerock':22 'recordings':8,9,10 'very':3,5 'vocal':23 'wax':1 'wma':13,15,17 'wma32k':19
                                    'search_combo'  '1':14C,15C '1878':27 '1920':28 '32k':30,32,34 '4713':12C '4713c11':16C 'ada':9B 'c':13C 'can':2A 'cylinder':18,20 'cylindervery':22 'edison':11C 'i':5A,36 'im':7A 'irish':8A 'jones':10B 'm':6A,37 'old':23 'prerock':38 'recordings':24,25,26 'tell':3A 'that':4A 'very':19,21 'vocal':39 'wax':17 'wma':29,31,33 'wma32k':35 'you':1A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', '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-1']
                                      'lastfmtags'  ['gramophone', 'female vocalists', 'tin pan alley', 'vocal', 'all']
                                        'tag_date'  1900
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621853378.7598872  (2021-05-24 12:49:38)
                             'size'  3607487