======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '309'
                                          'artist'  'Secret Chiefs 3'
                                     'text_people'  ''
                                         'release'  'First Grand Constitution and Bylaws'
                                           'title'  'Killing of Kings'
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 "'q-chart-2', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  ("['instrumental', 'experimental rock', 'avant garde', 'experimental', "
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                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '9'
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'eid-unsorted'
                                             'bpm'  '127.846'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'First Grand Constitution and Bylaws'
'TBPM' (BPM (beats per minute))                     '127.846'
'TCON' (Content type, a.k.a. Genre)                 'eid-unsorted'
'TDOR' (Original release time)                      '2000'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'Killing of Kings'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Secret Chiefs 3'
'TRCK' (Track number/Position in set)               '9'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['instrumental',
 'experimental rock',
 'avant garde',
 'experimental',
 'electronic']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-4.58 dB'
'TXXX:replaygain_track_peak'                        '0.834862'

========================== row from database ==========================
                                              'id'  1320402
                                            'path'  /data/Music/Bulk/00poprockelectronic/Secret Chiefs 3/Secret_Chiefs3-First_Grand_Constitution_and_Bylaws-10-Killing_of_Kings.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  309
                                           'genre'  eid-unsorted
                                        'filesize'  4958051
                                           'mtime'  1620521295
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Secret_Chiefs3 First_Grand_Constitution_and_Bylaws 10 Killing_of_Kings eid unsorted
                                      'tag_artist'  Secret Chiefs 3
                                     'tag_release'  First Grand Constitution and Bylaws
                                       'tag_title'  Killing of Kings
                                             'bpm'  127.846
                                    'search_title'  'killing':1 'kings':3 'of':2
                                   'search_artist'  '3':3 'chiefs':2 'secret':1
                                  'search_release'  'and':4 'bylaws':5 'constitution':3 'first':1 'grand':2
                                     'search_rest'  '00poprockelectronic':1 'and':7 'bylaws':8 'chiefs3':3 'constitution':6 'eid':12 'first':4 'grand':5 'killing':9 'kings':11 'of':10 'secret':2 'unsorted':13
                                    'search_combo'  '00poprockelectronic':12 '3':6B 'and':10C,18 'bylaws':11C,19 'chiefs':5B 'chiefs3':14 'constitution':9C,17 'eid':23 'first':7C,15 'grand':8C,16 'killing':1A,20 'kings':3A,22 'of':2A,21 'secret':4B,13 'unsorted':24
                                    'tag_tracknum'  9
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-1', 'q-bass-1', 'q-grit-3']
                                      'lastfmtags'  ['instrumental', 'experimental rock', 'avant garde', 'experimental', 'electronic']
                                        'tag_date'  2000
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620521295.3460872  (2021-05-09 02:48:15)
                             'size'  4958051