======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '178'
                                          'artist'  'Johnny Cash'
                                     'text_people'  'John Lennon/Paul McCartney'
                                         'release'  'American IV: The Man Comes Around'
                                           'title'  'In My Life'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['country', 'singer songwritergdchill', 'cover', 'singer songwriter']"
                                     'discogstags'  "['rock', 'folk, world, & country', 'country rock', 'acoustic', 'folk']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '8'
                                      'tracktotal'  ''
                                            'date'  '2002'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '84.4'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:MusicMatch_Mood:eng'                          'Morose'
'COMM:MusicMatch_Preference:eng'                    'Excellent'
'COMM:MusicMatch_Tempo:eng'                         'None'
'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\x000\x008\x009\x006\x008\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x00 \x001\x005\x004\x008\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x005\x007\x006\x002\x002\x005\x009\x00\x00\x00'  PRIV(owner='WM/UniqueFileIdentifier', data=b'A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x006\x000\x008\x009\x006\x008\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x00 \x001\x005\x004\x008\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x005\x007\x006\x002\x002\x005\x009\x00\x00\x00')
'PRIV:WM/WMCollectionGroupID:´Å\x85\x89kêû@\x9aÞTÐ\x00ôWß'  PRIV(owner='WM/WMCollectionGroupID', data=b'\xb4\xc5\x85\x89k\xea\xfb@\x9a\xdeT\xd0\x00\xf4W\xdf')
'PRIV:WM/WMCollectionID:´Å\x85\x89kêû@\x9aÞTÐ\x00ôWß'  PRIV(owner='WM/WMCollectionID', data=b'\xb4\xc5\x85\x89k\xea\xfb@\x9a\xdeT\xd0\x00\xf4W\xdf')
'PRIV:WM/WMContentID:#L\x0eN\x16\x93\x9dMº\x15µ8ZFK\x99'  PRIV(owner='WM/WMContentID', data=b'#L\x0eN\x16\x93\x9dM\xba\x15\xb58ZFK\x99')
'TALB' (Album/Movie/Show title)                     'American IV: The Man Comes Around'
'TBPM' (BPM (beats per minute))                     '84.4'
'TCOM' (Composer)                                   'John Lennon/Paul McCartney'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '2002'
'TIT2' (Title/songname/content description)         'In My Life'
'TKEY' (Initial key)                                '11B'
'TLEN' (Length)                                     '178000'
'TPE1' (Lead performer(s)/Soloist(s))               'Johnny Cash'
'TPE2' (Band/orchestra/accompaniment)               'Johnny Cash'
'TPUB' (Publisher)                                  'Universal International'
'TRCK' (Track number/Position in set)               '8'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'folk, world, & country', 'country rock', 'acoustic', 'folk']
'TXXX:lastfmtags'                                   ['country', 'singer songwritergdchill', 'cover', 'singer songwriter']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.63 dB'
'TXXX:replaygain_track_peak'                        '0.540225'

========================== row from database ==========================
                                              'id'  1387826
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Johnny Cash_/American IV - The Man Comes Around/08 - in my life.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  178
                                           'genre'  loc-namerica-country
                                        'filesize'  4280435
                                           'mtime'  1621630276
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos Cash_ 08 in my life loc namerica country
                                      'tag_artist'  Johnny Cash
                                     'tag_release'  American IV: The Man Comes Around
                                       'tag_title'  In My Life
                                             'bpm'  84.4
                                    'search_title'  'in':1 'life':3 'my':2
                                   'search_artist'  'cash':2 'johnny':1
                                  'search_release'  'american':1 'around':7 'comes':6 'iv':2,3 'man':5 'the':4
                                     'search_rest'  '00singer':1 'cash':4 'country':10 'eos':3 'in':5 'life':7 'loc':8 'my':6 'namerica':9 'songwriter':2
                                    'search_combo'  '00singer':13 'american':6C 'around':12C 'cash':5B,16 'comes':11C 'country':22 'eos':15 'in':1A,17 'iv':7C,8C 'johnny':4B 'life':3A,19 'loc':20 'man':10C 'my':2A,18 'namerica':21 'songwriter':14 'the':9C
                                    'tag_tracknum'  8
                                      'num_images'  1
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['country', 'singer songwritergdchill', 'cover', 'singer songwriter']
                                        'tag_date'  2002
                                     'discogstags'  ['rock', 'folk, world, & country', 'country rock', 'acoustic', 'folk']

============================== file details ==============================
                                           'mtime'  1621630276.1247125  (2021-05-21 22:51:16)
                             'size'  4280435