======================== unified (from filesystem) ========================
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                                        'duration'  '65'
                                          'artist'  'Wolfgang Amadeus Mozart'
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======================== rawer (from filesystem) ========================

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'TBPM' (BPM (beats per minute))                     '130.566'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TIT2' (Title/songname/content description)         'Alfred Brendel - Var.2'
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Wolfgang Amadeus Mozart'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '3'
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'TXXX:lastfmtags'                                   ['instrumental', 'composers', 'piano', 'classical', 'classic']
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'TXXX:q-busy'                                       '2'
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'TXXX:q-drums'                                      '1'
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'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.55 dB'
'TXXX:replaygain_track_peak'                        '0.520192'

========================== row from database ==========================
                                              'id'  180871
                                            'path'  /data/Music/Bulk/00instruments-classical/Mozart/Variations In D Major On A Minuet By Duport, K.573/Mozart Variations in D major on a Minuet by Duport, K.573 - Alfred Brendel - Var.2.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  65
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  1576925
                                           'mtime'  1620574201
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical Minuet By Duport, K.573 major Minuet by Duport, K.573 prerock classical classical instruments
                                      'tag_artist'  Wolfgang Amadeus Mozart
                                     'tag_release'  Variations In D Major On A Min
                                       'tag_title'  Alfred Brendel - Var.2
                                             'bpm'  130.566
                                    'search_title'  '2':4 'alfred':1 'brendel':2 'var':3 'var2':5
                                   'search_artist'  'amadeus':2 'mozart':3 'wolfgang':1
                                  'search_release'  'a':6 'd':3 'in':2 'major':4 'min':7 'on':5 'variations':1
                                     'search_rest'  '00instruments':1 '573':8 'by':4 'classical':2 'duport':5,6 'instruments':12 'k':7 'k573':9 'major':10 'minuet':3 'prerock':11
                                    'search_combo'  '00instruments':16 '2':4A '573':23 'a':14C 'alfred':1A 'amadeus':7B 'brendel':2A 'by':19 'classical':17 'd':11C 'duport':20,21 'in':10C 'instruments':27 'k':22 'k573':24 'major':12C,25 'min':15C 'minuet':18 'mozart':8B 'on':13C 'prerock':26 'var':3A 'var2':5A 'variations':9C 'wolfgang':6B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-4', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-1', 'Q-HAP-3', 'Q-PLAY-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['instrumental', 'composers', 'piano', 'classical', 'classic']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620574200.6897259  (2021-05-09 17:30:00)
                             'size'  1576925