======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '222'
                                          'artist'  'Bohumir Kryl (cornet)'
                                     'text_people'  ''
                                         'release'  'Edison 80578 R'
                                           'title'  'Where The River Shannon Flows'
                                           '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'  '1920'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '145.3'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'COMM:MusicMatch_Bio:eng'                           'Sound changed by Breda4@hotmail.com'
'TALB' (Album/Movie/Show title)                     'Edison 80578 R'
'TBPM' (BPM (beats per minute))                     '145.3'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1920'
'TIT2' (Title/songname/content description)         'Where The River Shannon Flows'
'TKEY' (Initial key)                                '10A'
'TLEN' (Length)                                     '222000'
'TPE1' (Lead performer(s)/Soloist(s))               'Bohumir Kryl (cornet)'
'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'                        '+1.84 dB'
'TXXX:replaygain_track_peak'                        '0.608436'

========================== row from database ==========================
                                              'id'  511747
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Wax Cylinder／very old recordings： 1878-1920 [wma／32k]/1920 - Bohumir Kryl - Where The River Shannon Flows [corn.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  222
                                           'genre'  prerock-unsorted
                                        'filesize'  4450179
                                           'mtime'  1621698461
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Wax Cylinder／very old recordings： 1878 1920 [wma／32k] 1920 [corn prerock unsorted
                                      'tag_artist'  Bohumir Kryl (cornet)
                                     'tag_release'  Edison 80578 R
                                       'tag_title'  Where The River Shannon Flows
                                             'bpm'  145.3
                                    'search_title'  'flows':5 'river':3 'shannon':4 'the':2 'where':1
                                   'search_artist'  'bohumir':1 'cornet':3,4 'kryl':2
                                  'search_release'  '80578':2 'edison':1 'r':3
                                     'search_rest'  '1878':11 '1920':12 '32k':14,16,18 'corn':20,21 'cylinder':2,4 'cylindervery':6 'old':7 'prerock':22 'recordings':8,9,10 'unsorted':23 'very':3,5 'wax':1 'wma':13,15,17 'wma32k':19
                                    'search_combo'  '1878':23 '1920':24 '32k':26,28,30 '80578':11C 'bohumir':6B 'corn':32,33 'cornet':8B,9B 'cylinder':14,16 'cylindervery':18 'edison':10C 'flows':5A 'kryl':7B 'old':19 'prerock':34 'r':12C 'recordings':20,21,22 'river':3A 'shannon':4A 'the':2A 'unsorted':35 'very':15,17 'wax':13 'where':1A 'wma':25,27,29 'wma32k':31
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           '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'  1920
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621698460.5716567  (2021-05-22 17:47:40)
                             'size'  4450179