======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '187'
                                          'artist'  'Eddy Arnold'
                                     'text_people'  'Jimmie Driftwood'
                                         'release'  'Classic Country: Nashville Era, 1958-1963 Disc 1'
                                           'title'  'Tennessee Stud'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-3', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['country', 'male vocalists', 'oldies', 'classic country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '1959'
                                        'comments'  ''
                                           'genre'  'prerock-country'
                                             'bpm'  '94.547'
                                             'key'  '8B'
                                        'acoustid'  ''
rest: ''

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

'COMM::eng'                                         '59-294 POS 48'
'COMM:ID3v1 Comment:XXX'                            '59-294 POS 48'
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'PRIV:AverageLevel:)\n\x00\x00'                     PRIV(owner='AverageLevel', data=b')\n\x00\x00')
'PRIV:PeakValue:ÿ\x7f\x00\x00'                      PRIV(owner='PeakValue', data=b'\xff\x7f\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\x008\x009\x004\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\x007\x006\x000\x00\x00\x00'  PRIV(owner='WM/UniqueFileIdentifier', data=b'A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x006\x003\x004\x008\x009\x004\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\x007\x006\x000\x00\x00\x00')
'PRIV:WM/WMCollectionGroupID:é\x18Y×´è\x92@¡\x9cÒÎöÀÄ®'  PRIV(owner='WM/WMCollectionGroupID', data=b'\xe9\x18Y\xd7\xb4\xe8\x92@\xa1\x9c\xd2\xce\xf6\xc0\xc4\xae')
'PRIV:WM/WMCollectionID:é\x18Y×´è\x92@¡\x9cÒÎöÀÄ®'  PRIV(owner='WM/WMCollectionID', data=b'\xe9\x18Y\xd7\xb4\xe8\x92@\xa1\x9c\xd2\xce\xf6\xc0\xc4\xae')
'PRIV:WM/WMContentID:¾ÈÇ\x00~\x9e\x9bN\x99ÿ_\x01¯7\x7f\xa0'  PRIV(owner='WM/WMContentID', data=b'\xbe\xc8\xc7\x00~\x9e\x9bN\x99\xff_\x01\xaf7\x7f\xa0')
'TALB' (Album/Movie/Show title)                     'Classic Country: Nashville Era, 1958-1963 Disc 1'
'TBPM' (BPM (beats per minute))                     '94.547'
'TCOM' (Composer)                                   'Jimmie Driftwood'
'TCON' (Content type, a.k.a. Genre)                 'prerock-country'
'TDRC' (Recording time)                             '1959'
'TIT2' (Title/songname/content description)         'Tennessee Stud'
'TKEY' (Initial key)                                '8B'
'TLEN' (Length)                                     '187466'
'TPE1' (Lead performer(s)/Soloist(s))               'Eddy Arnold'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPUB' (Publisher)                                  'Time Life'
'TRCK' (Track number/Position in set)               '2'
'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', 'male vocalists', 'oldies', 'classic country']
'TXXX:q-bass'                                       '3'
'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'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.08 dB'
'TXXX:replaygain_track_peak'                        '1.004788'

========================== row from database ==========================
                                              'id'  1436856
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1959/59-294 - Eddy Arnold - Tennessee Stud.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  187
                                           'genre'  prerock-country
                                        'filesize'  7496096
                                           'mtime'  1621627916
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1959 59 294 prerock country
                                      'tag_artist'  Eddy Arnold
                                     'tag_release'  Classic Country: Nashville Era, 1958-1963 Disc 1
                                       'tag_title'  Tennessee Stud
                                             'bpm'  94.547
                                    'search_title'  'stud':2 'tennessee':1
                                   'search_artist'  'arnold':2 'eddy':1
                                  'search_release'  '1':11 '1958':7 '19581963':9 '1963':8 'classic':1 'country':2,3 'disc':10 'era':5,6 'nashville':4
                                     'search_rest'  '00oldiepop':5 '1959':6 '294':8 '59':7 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':9
                                    'search_combo'  '00oldiepop':20 '1':15C '1958':11C '19581963':13C '1959':21 '1963':12C '294':23 '59':22 'arnold':4B 'classic':5C 'country':6C,7C,19 'disc':14C 'eddy':3B 'era':9C,10C 'exotica':17 'jazz':16 'nashville':8C 'oldies':18 'prerock':24 'stud':2A 'tennessee':1A
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  8B
                                           '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-1', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['country', 'male vocalists', 'oldies', 'classic country']
                                        'tag_date'  1959
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627915.638792  (2021-05-21 22:11:55)
                             'size'  7496096