======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '195'
                                          'artist'  'Artie Shaw'
                                     'text_people'  'Fred Norman'
                                         'release'  '20s and 30s popular'
                                           'title'  'Solid Sam'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['big band', 'jazz', 'clarinet', 'oldies', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1936'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-soft-swing'
                                             'bpm'  '88.015'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'MCDI' (Music CD identifier)                        MCDI(data=b'1\x005\x00+\x009\x006\x00+\x00A\x004\x004\x00D\x00+\x00D\x00F\x00A\x00C\x00+\x001\x001\x00D\x008\x003\x00+\x001\x005\x000\x005\x003\x00+\x001\x008\x007\x001\x00D\x00+\x001\x00B\x00E\x00B\x00E\x00+\x001\x00F\x009\x000\x005\x00+\x002\x003\x003\x009\x00A\x00+\x002\x006\x00D\x002\x000\x00+\x002\x00A\x009\x003\x009\x00+\x002\x00D\x00F\x002\x004\x00+\x003\x001\x007\x00E\x004\x00+\x003\x004\x008\x003\x004\x00+\x003\x006\x00E\x007\x000\x00+\x003\x00A\x008\x005\x00C\x00+\x003\x00D\x00F\x009\x00E\x00+\x004\x001\x00A\x006\x006\x00+\x004\x004\x00A\x000\x00F\x00+\x004\x007\x00E\x005\x00F\x00+\x004\x00B\x00A\x005\x00A\x00+\x004\x00F\x005\x000\x002\x00\x00\x00')
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'PRIV:PeakValue:¡z\x00\x00'                         PRIV(owner='PeakValue', data=b'\xa1z\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')
'PRIV:WM/Provider:A\x00M\x00G\x00\x00\x00'          PRIV(owner='WM/Provider', data=b'A\x00M\x00G\x00\x00\x00')
'PRIV:WM/UniqueFileIdentifier:A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x005\x003\x008\x005\x002\x005\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x00 \x007\x005\x002\x002\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x004\x008\x002\x000\x006\x004\x003\x00\x00\x00'  PRIV(owner='WM/UniqueFileIdentifier', data=b'A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x005\x003\x008\x005\x002\x005\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x00 \x007\x005\x002\x002\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x004\x008\x002\x000\x006\x004\x003\x00\x00\x00')
'PRIV:WM/WMCollectionGroupID:\xad\x1c\x1b®\nåID\x8cëÅ!ªP\x07\xad'  PRIV(owner='WM/WMCollectionGroupID', data=b'\xad\x1c\x1b\xae\n\xe5ID\x8c\xeb\xc5!\xaaP\x07\xad')
'PRIV:WM/WMCollectionID:\xad\x1c\x1b®\nåID\x8cëÅ!ªP\x07\xad'  PRIV(owner='WM/WMCollectionID', data=b'\xad\x1c\x1b\xae\n\xe5ID\x8c\xeb\xc5!\xaaP\x07\xad')
'PRIV:WM/WMContentID:8ôªu\x93\x0b\x15K§Ä\rr´Ñ:\x17'  PRIV(owner='WM/WMContentID', data=b'8\xf4\xaau\x93\x0b\x15K\xa7\xc4\rr\xb4\xd1:\x17')
'TALB' (Album/Movie/Show title)                     '20s and 30s popular'
'TBPM' (BPM (beats per minute))                     '88.015'
'TCOM' (Composer)                                   'Fred Norman'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-soft-swing'
'TDRC' (Recording time)                             '1936'
'TIT2' (Title/songname/content description)         'Solid Sam'
'TKEY' (Initial key)                                '4A'
'TLEN' (Length)                                     '196346'
'TPE1' (Lead performer(s)/Soloist(s))               'Artie Shaw'
'TPE2' (Band/orchestra/accompaniment)               'Artie Shaw'
'TPUB' (Publisher)                                  'History'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['big band', 'jazz', 'clarinet', 'oldies', 'swing']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.22 dB'
'TXXX:replaygain_track_peak'                        '0.398607'

========================== row from database ==========================
                                              'id'  1131263
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Artie Shaw - Solid Sam 1936.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  195
                                           'genre'  prerock-jb-jazz-soft-swing
                                        'filesize'  3152370
                                           'mtime'  1620524231
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s 1930s 1936 prerock jb jazz soft swing
                                      'tag_artist'  Artie Shaw
                                     'tag_release'  20s and 30s popular
                                       'tag_title'  Solid Sam
                                             'bpm'  88.015
                                    'search_title'  'sam':2 'solid':1
                                   'search_artist'  'artie':1 'shaw':2
                                  'search_release'  '20s':1 '30s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':7 '1936':8 'country':4 'exotica':2 'jazz':1 'jb':10 'oldies':3 'prerock':9 'soft':11 'swing':12
                                    'search_combo'  '00oldiepop':13 '1920s':14 '1930s':15 '1936':16 '20s':5C '30s':7C 'and':6C 'artie':3B 'country':12 'exotica':10 'jazz':9 'jb':18 'oldies':11 'popular':8C 'prerock':17 'sam':2A 'shaw':4B 'soft':19 'solid':1A 'swing':20
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['big band', 'jazz', 'clarinet', 'oldies', 'swing']
                                        'tag_date'  1936
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620524230.8166468  (2021-05-09 03:37:10)
                             'size'  3152370