======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '167'
                                          'artist'  'George Jones'
                                     'text_people'  'J.P. Richardson'
                                         'release'  'Classic Country: 1950-1959 [2 CD] Disc 2'
                                           'title'  'White Lightning'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-3', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['country', 'singer songwriter', 'americana', 'classic country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '1959'
                                        'comments'  ''
                                           'genre'  'prerock-country'
                                             'bpm'  '145.895'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'COMM::eng'                                         '59-415 POS 73'
'COMM:ID3v1 Comment:XXX'                            '59-415 POS 73'
'MCDI' (Music CD identifier)                        MCDI(data=b'F\x00+\x009\x006\x00+\x003\x001\x00B\x005\x00+\x005\x00C\x007\x003\x00+\x008\x00C\x008\x00E\x00+\x00B\x003\x001\x00C\x00+\x00D\x00D\x004\x00A\x00+\x001\x000\x00A\x001\x00A\x00+\x001\x003\x006\x000\x000\x00+\x001\x006\x00A\x00D\x00C\x00+\x001\x009\x007\x00B\x00B\x00+\x001\x00C\x004\x005\x00A\x00+\x001\x00F\x00A\x007\x002\x00+\x002\x002\x007\x007\x007\x00+\x002\x005\x001\x00E\x005\x00+\x002\x008\x004\x00A\x003\x00+\x002\x00B\x001\x003\x00F\x00\x00\x00')
'PRIV:AverageLevel:\x15\x10\x00\x00'                PRIV(owner='AverageLevel', data=b'\x15\x10\x00\x00')
'PRIV:PeakValue:~e\x00\x00'                         PRIV(owner='PeakValue', data=b'~e\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 \x006\x003\x004\x007\x006\x007\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00V\x00A\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x006\x001\x002\x002\x006\x008\x004\x00\x00\x00'  PRIV(owner='WM/UniqueFileIdentifier', data=b'A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x006\x003\x004\x007\x006\x007\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00V\x00A\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x006\x001\x002\x002\x006\x008\x004\x00\x00\x00')
'PRIV:WM/WMCollectionGroupID:\x02\x81âÄa¹5K°ì\x97½d{î\x07'  PRIV(owner='WM/WMCollectionGroupID', data=b'\x02\x81\xe2\xc4a\xb95K\xb0\xec\x97\xbdd{\xee\x07')
'PRIV:WM/WMCollectionID:׫\x07\x87\x9få8N\x8c,w#\x9cÈ«d'  PRIV(owner='WM/WMCollectionID', data=b'\xd7\xab\x07\x87\x9f\xe58N\x8c,w#\x9c\xc8\xabd')
'PRIV:WM/WMContentID:Î\x13\x17\x96Ó{\x89C\x8dß·\x93\x8baü-'  PRIV(owner='WM/WMContentID', data=b'\xce\x13\x17\x96\xd3{\x89C\x8d\xdf\xb7\x93\x8ba\xfc-')
'TALB' (Album/Movie/Show title)                     'Classic Country: 1950-1959 [2 CD] Disc 2'
'TBPM' (BPM (beats per minute))                     '145.895'
'TCOM' (Composer)                                   'J.P. Richardson'
'TCON' (Content type, a.k.a. Genre)                 'prerock-country'
'TDRC' (Recording time)                             '1959'
'TIT2' (Title/songname/content description)         'White Lightning'
'TKEY' (Initial key)                                '6B'
'TLEN' (Length)                                     '167666'
'TPE1' (Lead performer(s)/Soloist(s))               'George Jones'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPUB' (Publisher)                                  'Time Life'
'TRCK' (Track number/Position in set)               '1'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['country', 'singer songwriter', 'americana', 'classic country']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'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'                        '+2.35 dB'
'TXXX:replaygain_track_peak'                        '0.393139'

========================== row from database ==========================
                                              'id'  1448216
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1959/59-415 - George Jones - White Lightning.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  167
                                           'genre'  prerock-country
                                        'filesize'  6704744
                                           'mtime'  1621627916
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 415 prerock country
                                      'tag_artist'  George Jones
                                     'tag_release'  Classic Country: 1950-1959 [2 CD] Disc 2
                                       'tag_title'  White Lightning
                                             'bpm'  145.895
                                    'search_title'  'lightning':2 'white':1
                                   'search_artist'  'george':1 'jones':2
                                  'search_release'  '1950':4 '19501959':6 '1959':5 '2':7,8 'cd':9,10 'classic':1 'country':2,3 'disc':11
                                     'search_rest'  '00oldiepop':5 '415':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':7
                                    'search_combo'  '00oldiepop':20 '1950':8C '19501959':10C '1959':9C '2':11C,12C '415':21 'cd':13C,14C 'classic':5C 'country':6C,7C,19 'disc':15C 'exotica':17 'george':3B 'jazz':16 'jones':4B 'lightning':2A 'oldies':18 'prerock':22 'white':1A
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-2', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['country', 'singer songwriter', 'americana', 'classic country']
                                        'tag_date'  1959
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627915.7581394  (2021-05-21 22:11:55)
                             'size'  6704744