======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '172'
                                          'artist'  'The Black Keys'
                                     'text_people'  'Dan Auerbach/Patrick Carney'
                                         'release'  'Rubber Factory'
                                           'title'  'Keep Me'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-OLDST-2', 'Q-JZFKS-1', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['blues rock', 'indie', 'blues', 'indie rock', 'rock']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '12'
                                      'tracktotal'  ''
                                            'date'  '2004'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-indie-rock'
                                             'bpm'  '119.900'
                                             'key'  '2A'
                                        'acoustid'  ''
rest: ''

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

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'COMM:iTunes_CDDB_IDs:eng'                          '13+6D879D623ADCEDF6B630A54F7C34AA66+4400653'
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'PRIV:WM/WMCollectionID:s<ýðVÅÀO¬\x18xLX%\x8bê'     PRIV(owner='WM/WMCollectionID', data=b's<\xfd\xf0V\xc5\xc0O\xac\x18xLX%\x8b\xea')
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'TALB' (Album/Movie/Show title)                     'Rubber Factory'
'TBPM' (BPM (beats per minute))                     '119.900'
'TCOM' (Composer)                                   'Dan Auerbach/Patrick Carney'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-indie-rock'
'TDRC' (Recording time)                             '2004'
'TENC' (Encoded by)                                 'iTunes v4.6.0.15'
'TIT2' (Title/songname/content description)         'Keep Me'
'TKEY' (Initial key)                                '2A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Black Keys'
'TPE2' (Band/orchestra/accompaniment)               'The Black Keys'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Fat Possum'
'TRCK' (Track number/Position in set)               '12'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['blues rock', 'indie', 'blues', 'indie rock', 'rock']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.76 dB'
'TXXX:replaygain_track_peak'                        '0.323513'

========================== row from database ==========================
                                              'id'  1378604
                                            'path'  /data/Music/Bulk/00poprockelectronic-poprock-indierock/The Black Keys/Rubber Factory/12 keep me.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  172
                                           'genre'  ifs-songwriter-indie-rock
                                        'filesize'  4133765
                                           'mtime'  1637330336
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic poprock indierock 12 keep me ifs songwriter indie rock
                                      'tag_artist'  The Black Keys
                                     'tag_release'  Rubber Factory
                                       'tag_title'  Keep Me
                                             'bpm'  119.9
                                    'search_title'  'keep':1 'me':2
                                   'search_artist'  'black':2 'keys':3 'the':1
                                  'search_release'  'factory':2 'rubber':1
                                     'search_rest'  '00poprockelectronic':1 'ifs':6 'indie':8 'indierock':3 'keep':4 'me':5 'poprock':2 'rock':9 'songwriter':7
                                    'search_combo'  '00poprockelectronic':8 'black':4B 'factory':7C 'ifs':13 'indie':15 'indierock':10 'keep':1A,11 'keys':5B 'me':2A,12 'poprock':9 'rock':16 'rubber':6C 'songwriter':14 'the':3B
                                    'tag_tracknum'  12
                                      'num_images'  0
                                             'key'  2A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-4', 'q-other-4', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['blues rock', 'indie', 'blues', 'indie rock', 'rock']
                                        'tag_date'  2004
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1637330336.2311206  (2021-11-19 14:58:56)
                             'size'  4133765