======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '152'
                                          'artist'  'Johnny Cash'
                                     'text_people'  'Anita Carter/Helen Carter/June Carter Cash/Mother Maybelle Carter'
                                         'release'  'Unchained'
                                           'title'  "The Kneeling Drunkard's Plea"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-2', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['country', 'singer songwritergdchill', 'cover', 'singer songwriter']"
                                     'discogstags'  "['rock', 'country rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '8'
                                      'tracktotal'  ''
                                            'date'  '1996'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '103.6'
                                             'key'  '8B'
                                        'acoustid'  ''
rest: ''

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

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'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')
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'TALB' (Album/Movie/Show title)                     'Unchained'
'TBPM' (BPM (beats per minute))                     '103.6'
'TCOM' (Composer)                                   'Anita Carter/Helen Carter/June Carter Cash/Mother Maybelle Carter'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1996'
'TIT2' (Title/songname/content description)         "The Kneeling Drunkard's Plea"
'TKEY' (Initial key)                                '8B'
'TLEN' (Length)                                     '152840'
'TPE1' (Lead performer(s)/Soloist(s))               'Johnny Cash'
'TPE2' (Band/orchestra/accompaniment)               'Johnny Cash'
'TPUB' (Publisher)                                  'Universal'
'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', 'country rock']
'TXXX:lastfmtags'                                   ['country', 'singer songwritergdchill', 'cover', 'singer songwriter']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-1.24 dB'
'TXXX:replaygain_track_peak'                        '0.503191'

========================== row from database ==========================
                                              'id'  1516336
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Johnny Cash_/Unchained/08 the kneeling drunkard_s plea.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  152
                                           'genre'  loc-namerica-country
                                        'filesize'  2442968
                                           'mtime'  1621630287
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos Cash_ 08 the kneeling drunkard_s plea loc namerica country
                                      'tag_artist'  Johnny Cash
                                     'tag_release'  Unchained
                                       'tag_title'  The Kneeling Drunkard's Plea
                                             'bpm'  103.6
                                    'search_title'  'drunkard':3 'drunkards':5 'kneeling':2 'plea':6 's':4 'the':1
                                   'search_artist'  'cash':2 'johnny':1
                                  'search_release'  'unchained':1
                                     'search_rest'  '00singer':1 'cash':4 'country':12 'drunkard':7 'eos':3 'kneeling':6 'loc':10 'namerica':11 'plea':9 's':8 'songwriter':2 'the':5
                                    'search_combo'  '00singer':10 'cash':8B,13 'country':21 'drunkard':3A,16 'drunkards':5A 'eos':12 'johnny':7B 'kneeling':2A,15 'loc':19 'namerica':20 'plea':6A,18 's':4A,17 'songwriter':11 'the':1A,14 'unchained':9C
                                    'tag_tracknum'  8
                                      'num_images'  0
                                             'key'  8B
                                           '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-2', 'q-syn-1', 'q-chart-4', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['country', 'singer songwritergdchill', 'cover', 'singer songwriter']
                                        'tag_date'  1996
                                     'discogstags'  ['rock', 'country rock']

============================== file details ==============================
                                           'mtime'  1621630286.745401  (2021-05-21 22:51:26)
                             'size'  2442968