======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '289'
                                          'artist'  'The String Quartet [Audioslave]'
                                     'text_people'  'B. Wilk/Chris Cornell/T. Commerford/T. Morello'
                                         'release'  'Tribute to Audioslave'
                                           'title'  'Like a Stone'
                                           'quals'  ("['Q-HAP-2', 'Q-OLDST-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'q-syn-2', "
 "'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', 'q-drums-1', "
 "'q-other-4', 'q-piano-1', 'q-vocals-1', 'Q-HHRNBTT-1', 'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'classical', 'covers', 'tribute', 'cover']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  ''
                                            'date'  '2003'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments;set-cover or covered'
                                             'bpm'  '105.587'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            ' 0000311C 00003206 00010A71'
'COMM:iTunNORM:eng'                                 (' 0000311C 00003206 00010A71 0000FD6E 0002F3EB 0002F2D4 00008000 00008000 '
 '0000022D 00000315')
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'TALB' (Album/Movie/Show title)                     'Tribute to Audioslave'
'TBPM' (BPM (beats per minute))                     '105.587'
'TCOM' (Composer)                                   'B. Wilk/Chris Cornell/T. Commerford/T. Morello'
'TCON' (Content type, a.k.a. Genre)                 ['prerock-classical or classical instruments', 'set-cover or covered']
'TDRC' (Recording time)                             '2003'
'TIT2' (Title/songname/content description)         'Like a Stone'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'The String Quartet [Audioslave]'
'TPE2' (Band/orchestra/accompaniment)               'The String Quartet [Audioslave]'
'TPUB' (Publisher)                                  'Vitamin'
'TRCK' (Track number/Position in set)               '3'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['instrumental', 'classical', 'covers', 'tribute', 'cover']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+23.77 dB'
'TXXX:replaygain_track_peak'                        '0.029315'

========================== row from database ==========================
                                              'id'  1352697
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/audio slave ft the string quartet - like a stone.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  289
                                           'genre'  prerock-classical or classical instruments;set-cover or covered
                                        'filesize'  4640302
                                           'mtime'  1637329821
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] audio ft the string quartet like stone prerock classical or classical instruments;set cover or covered
                                      'tag_artist'  The String Quartet [Audioslave]
                                     'tag_release'  Tribute to Audioslave
                                       'tag_title'  Like a Stone
                                             'bpm'  105.587
                                    'search_title'  'a':2 'like':1 'stone':3
                                   'search_artist'  'audioslave':4,5 'quartet':3 'string':2 'the':1
                                  'search_release'  'audioslave':3 'to':2 'tribute':1
                                     'search_rest'  '00poprockelectronic':1 'audio':7 'classical':15 'cover':21 'covered':22 'files':5,6 'ft':8 'instruments':17,19 'like':12 'loose':3,4 'or':16 'prerock':14 'quartet':11 'set':18,20 'stone':13 'string':10 'the':9 'unsorted':2
                                    'search_combo'  '00poprockelectronic':12 'a':2A 'audio':18 'audioslave':7B,8B,11C 'classical':26 'cover':32 'covered':33 'files':16,17 'ft':19 'instruments':28,30 'like':1A,23 'loose':14,15 'or':27 'prerock':25 'quartet':6B,22 'set':29,31 'stone':3A,24 'string':5B,21 'the':4B,20 'to':10C 'tribute':9C 'unsorted':13
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-4', 'Q-HAP-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['instrumental', 'classical', 'covers', 'tribute', 'cover']
                                        'tag_date'  2003
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1637329821.0982316  (2021-11-19 14:50:21)
                             'size'  4640302