======================== unified (from filesystem) ========================
                                         'bitrate'  '198.155'
                                        'duration'  '387'
                                          'artist'  '65daysofstatic'
                                     'text_people'  ''
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                                           'title'  "These Things You Can't Unlearn"
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                                      'lastfmtags'  "['instrumental', 'math rock', 'post rock', 'experimental', 'electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
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                                      'tracktotal'  '12'
                                            'date'  '2007'
                                        'comments'  ''
                                           'genre'  'rock-post'
                                             'bpm'  '117.2'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '117.2'
'TCON' (Content type, a.k.a. Genre)                 'rock-post'
'TDRC' (Recording time)                             '2007'
'TIT2' (Title/songname/content description)         "These Things You Can't Unlearn"
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               '65daysofstatic'
'TPE2' (Band/orchestra/accompaniment)               '65daysofstatic'
'TRCK' (Track number/Position in set)               '05/12'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['instrumental', 'math rock', 'post rock', 'experimental', 'electronic']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-1.00 dB'
'TXXX:replaygain_track_peak'                        '0.521465'

========================== row from database ==========================
                                              'id'  1516545
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/65daysofstatic/The Destruction of Small Ideas/05 These Things You Can_t Unlearn.mp3
                                         'working'  None
                                         'bitrate'  198
                                    'duration_sec'  387
                                           'genre'  rock-post
                                        'filesize'  9595856
                                           'mtime'  1622801824
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm 05 Can_t rock post
                                      'tag_artist'  65daysofstatic
                                     'tag_release'  The Destruction of Small Ideas
                                       'tag_title'  These Things You Can't Unlearn
                                             'bpm'  117.2
                                    'search_title'  'can':4 'cant':6 't':5 'these':1 'things':2 'unlearn':7 'you':3
                                   'search_artist'  '65daysofstatic':1
                                  'search_release'  'destruction':2 'ideas':5 'of':3 'small':4 'the':1
                                     'search_rest'  'can':1 'post':4 'rock':3 't':2
                                    'search_combo'  '65daysofstatic':8B 'can':4A,14 'cant':6A 'destruction':10C 'ideas':13C 'of':11C 'post':17 'rock':16 'small':12C 't':5A,15 'the':9C 'these':1A 'things':2A 'unlearn':7A 'you':3A
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', '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-4', 'q-syn-2', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['instrumental', 'math rock', 'post rock', 'experimental', 'electronic']
                                        'tag_date'  2007
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1622801824.0227857  (2021-06-04 12:17:04)
                             'size'  9595856