======================== unified (from filesystem) ========================
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                                        'duration'  '191'
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                            'musicbrainz_artistid'  ''
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                                      'tracktotal'  '12'
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                                        'comments'  ''
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rest: ''

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

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'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter'
'TDRC' (Recording time)                             '2009'
'TENC' (Encoded by)                                 'iTunes 8.2'
'TIT2' (Title/songname/content description)         '1 John 4:16'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Mountain Goats'
'TPE2' (Band/orchestra/accompaniment)               'The Mountain Goats'
'TRCK' (Track number/Position in set)               '8/12'
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'TXXX:Q-JZFKS'                                      '1'
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'TXXX:Q-PIANO'                                      '3'
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'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.88 dB'
'TXXX:replaygain_track_peak'                        '0.707895'

========================== row from database ==========================
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                                            'path'  /data/Music/Bulk/00poprockelectronic/The Mountain Goats/The Life Of The World To Come/08 - The Mountain Goats- 1 John 416.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  191
                                           'genre'  ifs-songwriter
                                        'filesize'  3060856
                                           'mtime'  1628357240
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                                        'rest_str'   00poprockelectronic 08 416 ifs songwriter
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                                     'tag_release'  The Life Of The World To Come
                                       'tag_title'  1 John 4:16
                                             'bpm'  142.8
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                                   'search_artist'  'goats':3 'mountain':2 'the':1
                                  'search_release'  'come':6 'life':2 'of':3 'the':1 'to':5 'world':4
                                     'search_rest'  '00poprockelectronic':1 '416':2 'ifs':3 'songwriter':4
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                                      'lastfmtags'  ['indie', 'acoustic', 'lo fi', 'folk', 'pxs: loved']
                                        'tag_date'  2009
                                     'discogstags'  ['rock', 'folk, world, & country', 'folk rock', 'acoustic', 'lo-fi', 'indie rock']

============================== file details ==============================
                                           'mtime'  1628357240.0717108  (2021-08-07 19:27:20)
                             'size'  3060856