======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '549'
                                          'artist'  'Bing Crosby'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Gems From George White's Scandals"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-2', '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-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['crooners', 'jazz', 'christmas', 'oldies', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1931'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '124.087'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'PCNT' (Play counter)                               PCNT(count=0)
'PRIV:AverageLevel:/\x13\x00\x00'                   PRIV(owner='AverageLevel', data=b'/\x13\x00\x00')
'PRIV:PeakValue:¡w\x00\x00'                         PRIV(owner='PeakValue', data=b'\xa1w\x00\x00')
'PRIV:WM/MediaClassPrimaryID:¼}`Ñ#ãâK\x86¡H¤*(D\x1e'  PRIV(owner='WM/MediaClassPrimaryID', data=b'\xbc}`\xd1#\xe3\xe2K\x86\xa1H\xa4*(D\x1e')
'PRIV:WM/MediaClassSecondaryID:\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'  PRIV(owner='WM/MediaClassSecondaryID', data=b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
'TBPM' (BPM (beats per minute))                     '124.087'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1931'
'TIT2' (Title/songname/content description)         "Gems From George White's Scandals"
'TKEY' (Initial key)                                '7A'
'TLEN' (Length)                                     '549000'
'TPE1' (Lead performer(s)/Soloist(s))               'Bing Crosby'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['crooners', 'jazz', 'christmas', 'oldies', 'swing']
'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'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.29 dB'
'TXXX:replaygain_track_peak'                        '0.467312'

========================== row from database ==========================
                                              'id'  1529564
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/30_s collection/victor young & his brunswick orchestra, v=bing crosby, boswell sisters, mills brothers - medley 1931.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  549
                                           'genre'  prerock-swing
                                        'filesize'  8812578
                                           'mtime'  1620562681
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 30_s collection victor young & his brunswick orchestra, v=bing crosby, boswell sisters, mills brothers medley 1931 prerock swing
                                      'tag_artist'  Bing Crosby
                                     'tag_release'  None
                                       'tag_title'  Gems From George White's Scandals
                                             'bpm'  124.087
                                    'search_title'  'from':2 'gems':1 'george':3 's':5 'scandals':7 'white':4 'whites':6
                                   'search_artist'  'bing':1 'crosby':2
                                  'search_release'  
                                     'search_rest'  '1931':24 '30':5 'bing':15 'boswell':18 'brothers':22 'brunswick':11 'collection':7 'country':4 'crosby':16,17 'exotica':2 'his':10 'jazz':1 'medley':23 'mills':21 'oldies':3 'orchestra':12,13 'prerock':25 's':6 'sisters':19,20 'swing':26 'v':14 'victor':8 'young':9
                                    'search_combo'  '1931':33 '30':14 'bing':8B,24 'boswell':27 'brothers':31 'brunswick':20 'collection':16 'country':13 'crosby':9B,25,26 'exotica':11 'from':2A 'gems':1A 'george':3A 'his':19 'jazz':10 'medley':32 'mills':30 'oldies':12 'orchestra':21,22 'prerock':34 's':5A,15 'scandals':7A 'sisters':28,29 'swing':35 'v':23 'victor':17 'white':4A 'whites':6A 'young':18
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  7A
                                           '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-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['crooners', 'jazz', 'christmas', 'oldies', 'swing']
                                        'tag_date'  1931
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620562680.82277  (2021-05-09 14:18:00)
                             'size'  8812578