======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '182'
                                          'artist'  'Cal Stewart                               '
                                     'text_people'  ''
                                         'release'  'Silvertone-3932                              '
                                           'title'  'Uncle Josh and the Sailer (1908) '
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-1', "
 "'q-chart-1', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['real oldies', 'comedy', 'vaudeville', '1900s', 'all']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '00'
                                      'tracktotal'  ''
                                            'date'  '1908'
                                        'comments'  ''
                                           'genre'  'prerock-vaudeville'
                                             'bpm'  '99.9'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Silvertone-3932                              '
'TBPM' (BPM (beats per minute))                     '99.9'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vaudeville'
'TDRC' (Recording time)                             '1908'
'TIT2' (Title/songname/content description)         'Uncle Josh and the Sailer (1908) '
'TKEY' (Initial key)                                '7B'
'TLEN' (Length)                                     '182000'
'TPE1' (Lead performer(s)/Soloist(s))               'Cal Stewart                               '
'TRCK' (Track number/Position in set)               '00'
'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'                                   ['real oldies', 'comedy', 'vaudeville', '1900s', 'all']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '1'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.87 dB'
'TXXX:replaygain_track_peak'                        '0.986457'

========================== row from database ==========================
                                              'id'  514591
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Wax Cylinder／very old recordings： 1878-1920 [wma／32k]/1908 - Cal Stewart - Uncle Josh And The Sailor [speech].mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  182
                                           'genre'  prerock-vaudeville
                                        'filesize'  2926508
                                           'mtime'  1620666522
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Wax Cylinder／very old recordings： 1878 1920 [wma／32k] And The Sailor [speech] prerock vaudeville
                                      'tag_artist'  Cal Stewart                               
                                     'tag_release'  Silvertone-3932                              
                                       'tag_title'  Uncle Josh and the Sailer (1908) 
                                             'bpm'  99.9
                                    'search_title'  '1908':6,7 'and':3 'josh':2 'sailer':5 'the':4 'uncle':1
                                   'search_artist'  'cal':1 'stewart':2
                                  'search_release'  '3932':2 'silvertone':1 'silvertone3932':3
                                     'search_rest'  '1878':11 '1920':12 '32k':14,16,18 'and':20 'cylinder':2,4 'cylindervery':6 'old':7 'prerock':25 'recordings':8,9,10 'sailor':22 'speech':23,24 'the':21 'vaudeville':26 'very':3,5 'wax':1 'wma':13,15,17 'wma32k':19
                                    'search_combo'  '1878':23 '1908':6A,7A '1920':24 '32k':26,28,30 '3932':11C 'and':3A,32 'cal':8B 'cylinder':14,16 'cylindervery':18 'josh':2A 'old':19 'prerock':37 'recordings':20,21,22 'sailer':5A 'sailor':34 'silvertone':10C 'silvertone3932':12C 'speech':35,36 'stewart':9B 'the':4A,33 'uncle':1A 'vaudeville':38 'very':15,17 'wax':13 'wma':25,27,29 'wma32k':31
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-1', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['real oldies', 'comedy', 'vaudeville', '1900s', 'all']
                                        'tag_date'  1908
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620666521.5852625  (2021-05-10 19:08:41)
                             'size'  2926508