======================== unified (from filesystem) ========================
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                                        'duration'  '410'
                                          'artist'  'Tom Lehrer'
                                     'text_people'  ''
                                         'release'  'An Evening Wasted with Tom Leh'
                                           'title'  'In Old Mexico'
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                                      'lastfmtags'  "['humor', 'piano', 'comedy', 'satire', 'funny']"
                             'musicbrainz_albumid'  ''
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                            'musicbrainz_artistid'  ''
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                                     'tracknumber'  '6'
                                      'tracktotal'  ''
                                            'date'  '1959'
                                        'comments'  ''
                                           'genre'  'entertaining-comedians'
                                             'bpm'  '145.267'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '145.267'
'TCON' (Content type, a.k.a. Genre)                 'entertaining-comedians'
'TDRC' (Recording time)                             '1959'
'TIT2' (Title/songname/content description)         'In Old Mexico'
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Tom Lehrer'
'TRCK' (Track number/Position in set)               '6'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['humor', 'piano', 'comedy', 'satire', 'funny']
'TXXX:q-bass'                                       '1'
'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'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.88 dB'
'TXXX:replaygain_track_peak'                        '0.604980'

========================== row from database ==========================
                                              'id'  1350253
                                            'path'  /data/Music/Bulk/00spent/Tom Lehrer/1959 - An Evening Wasted With Tom Lehrer__Tom Lehrer - 06 - In Old Mexico.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  410
                                           'genre'  entertaining-comedians
                                        'filesize'  9844206
                                           'mtime'  1620527319
                                   'redo_metaread'  0
                                        'rest_str'   00spent 1959 With Lehrer__Tom 06 entertaining comedians
                                      'tag_artist'  Tom Lehrer
                                     'tag_release'  An Evening Wasted with Tom Leh
                                       'tag_title'  In Old Mexico
                                             'bpm'  145.267
                                    'search_title'  'in':1 'mexico':3 'old':2
                                   'search_artist'  'lehrer':2 'tom':1
                                  'search_release'  'an':1 'evening':2 'leh':6 'tom':5 'wasted':3 'with':4
                                     'search_rest'  '00spent':1 '1959':2 'comedians':7 'entertaining':6 'lehrer':4 'tom':5 'with':3
                                    'search_combo'  '00spent':12 '1959':13 'an':6C 'comedians':18 'entertaining':17 'evening':7C 'in':1A 'leh':11C 'lehrer':5B,15 'mexico':3A 'old':2A 'tom':4B,10C,16 'wasted':8C 'with':9C,14
                                    'tag_tracknum'  6
                                      'num_images'  0
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['humor', 'piano', 'comedy', 'satire', 'funny']
                                        'tag_date'  1959
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620527318.9735796  (2021-05-09 04:28:38)
                             'size'  9844206