======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '121'
                                          'artist'  'haydn quartet'
                                     'text_people'  ''
                                         'release'  'Ragtime'
                                           'title'  'Camp of the Hoboes 1903'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['all', 'grammophon', 'quartet', '1890 1920', 'acoustic era']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1903'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '133.8'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Ragtime'
'TBPM' (BPM (beats per minute))                     '133.8'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1903'
'TIT2' (Title/songname/content description)         'Camp of the Hoboes 1903'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'haydn quartet'
'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'                                   ['all', 'grammophon', 'quartet', '1890 1920', 'acoustic era']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'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'                        '+1.91 dB'
'TXXX:replaygain_track_peak'                        '0.505140'

========================== row from database ==========================
                                              'id'  513314
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Wax Cylinder／very old recordings： 1878-1920 [wma／32k]/1903 - Haydn Quartet - Camp Of The Hoboes [speech].mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  121
                                           'genre'  prerock-unsorted
                                        'filesize'  2434844
                                           'mtime'  1621698455
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Wax Cylinder／very old recordings： 1878 1920 [wma／32k] Haydn Quartet Of The [speech] prerock unsorted
                                      'tag_artist'  haydn quartet
                                     'tag_release'  Ragtime
                                       'tag_title'  Camp of the Hoboes 1903
                                             'bpm'  133.8
                                    'search_title'  '1903':5 'camp':1 'hoboes':4 'of':2 'the':3
                                   'search_artist'  'haydn':1 'quartet':2
                                  'search_release'  'ragtime':1
                                     'search_rest'  '1878':11 '1920':12 '32k':14,16,18 'cylinder':2,4 'cylindervery':6 'haydn':20 'of':22 'old':7 'prerock':26 'quartet':21 'recordings':8,9,10 'speech':24,25 'the':23 'unsorted':27 'very':3,5 'wax':1 'wma':13,15,17 'wma32k':19
                                    'search_combo'  '1878':19 '1903':5A '1920':20 '32k':22,24,26 'camp':1A 'cylinder':10,12 'cylindervery':14 'haydn':6B,28 'hoboes':4A 'of':2A,30 'old':15 'prerock':34 'quartet':7B,29 'ragtime':8C 'recordings':16,17,18 'speech':32,33 'the':3A,31 'unsorted':35 'very':11,13 'wax':9 'wma':21,23,25 'wma32k':27
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           '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-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['all', 'grammophon', 'quartet', '1890 1920', 'acoustic era']
                                        'tag_date'  1903
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621698455.0456614  (2021-05-22 17:47:35)
                             'size'  2434844