======================== unified (from filesystem) ========================
                                         'bitrate'  '64.0'
                                        'duration'  '142'
                                          'artist'  'Cylinder-Chicago T M Co 410'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "And Her Golden Hair Was Hanging Down Her Back-Banta's Orch"
                                           '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-4', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1895'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '144.4'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '144.4'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1895'
'TIT2' (Title/songname/content description)         "And Her Golden Hair Was Hanging Down Her Back-Banta's Orch"
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Cylinder-Chicago T M Co 410'
'TXXX:Mp3gain_minmax'                               '125,175'
'TXXX:Mp3gain_undo'                                 '+002,+002,N'
'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: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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+0.95 dB'
'TXXX:replaygain_track_peak'                        '0.701682'

========================== row from database ==========================
                                              'id'  1501276
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Wax Cylinder／very old recordings： 1878-1920 [wma／32k]/1895 - Cylinder-Chicago T M Co 410 - And Her Golden Hair Was Hanging Down Her Back-Banta_s Orch.mp3
                                         'working'  None
                                         'bitrate'  64
                                    'duration_sec'  142
                                           'genre'  prerock-unsorted
                                        'filesize'  1146463
                                           'mtime'  1621698450
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Wax Cylinder／very recordings： 1878 1920 [wma／32k] 1895 Banta_s prerock unsorted
                                      'tag_artist'  Cylinder-Chicago T M Co 410
                                     'tag_release'  None
                                       'tag_title'  And Her Golden Hair Was Hanging Down Her Back-Banta's Orch
                                             'bpm'  144.4
                                    'search_title'  'and':1 'back':8 'backbantas':11 'banta':9 'down':7 'golden':3 'hair':4 'hanging':6 'her':2 'orch':12 's':10 'was':5
                                   'search_artist'  '410':7 'chicago':2 'co':6 'cylinder':1 'cylinderchicago':3 'm':5 't':4
                                  'search_release'  
                                     'search_rest'  '1878':10 '1895':19 '1920':11 '32k':13,15,17 'banta':20 'cylinder':2,4 'cylindervery':6 'prerock':22 'recordings':7,8,9 's':21 'unsorted':23 'very':3,5 'wax':1 'wma':12,14,16 'wma32k':18
                                    'search_combo'  '1878':29 '1895':38 '1920':30 '32k':32,34,36 '410':19B 'and':1A 'back':8A 'backbantas':11A 'banta':9A,39 'chicago':14B 'co':18B 'cylinder':13B,21,23 'cylinderchicago':15B 'cylindervery':25 'down':7A 'golden':3A 'hair':4A 'hanging':6A 'her':2A 'm':17B 'orch':12A 'prerock':41 'recordings':26,27,28 's':10A,40 't':16B 'unsorted':42 'very':22,24 'was':5A 'wax':20 'wma':31,33,35 'wma32k':37
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', '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-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1895
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621698449.6056128  (2021-05-22 17:47:29)
                             'size'  1146463