======================== unified (from filesystem) ========================
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                                        'duration'  '198'
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                                           'title'  'Why are we doing this?'
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                                      'lastfmtags'  "['free jazz', 'productivity', 'jazz', 'gtd', 'audiobook']"
                                     'discogstags'  "['progressive house', 'electronic']"
                             'musicbrainz_albumid'  ''
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                            'musicbrainz_artistid'  ''
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                                      'tracktotal'  '11'
                                            'date'  '2002'
                                        'comments'  ''
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                                             'bpm'  '138.134'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '138.134'
'TCON' (Content type, a.k.a. Genre)                 'nonmusic-speech-instruction'
'TDRC' (Recording time)                             '2002'
'TIT2' (Title/songname/content description)         'Why are we doing this?'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'David Allen'
'TRCK' (Track number/Position in set)               '2/11'
'TSSE' (Software/Hardware and settings used for encoding)  'Audiograbber 1.83.01, LAME dll 3.97, 64 Kbit/s, Mono, Voice quality'
'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:discogstags'                                  ['progressive house', 'electronic']
'TXXX:lastfmtags'                                   ['free jazz', 'productivity', 'jazz', 'gtd', 'audiobook']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+3.65 dB'
'TXXX:replaygain_track_peak'                        '0.564664'

========================== row from database ==========================
                                              'id'  291983
                                            'path'  /data/Music/Bulk/0nonmusic/Getting Things Done Fast/GTDFast08 - 02 - Why are we doing this-.mp3
                                         'working'  None
                                         'bitrate'  64
                                    'duration_sec'  198
                                           'genre'  nonmusic-speech-instruction
                                        'filesize'  1594339
                                           'mtime'  1620562207
                                   'redo_metaread'  0
                                        'rest_str'   0nonmusic GTDFast08 02 nonmusic speech instruction
                                      'tag_artist'  David Allen
                                     'tag_release'  Getting Things Done Fast (Disc 8)
                                       'tag_title'  Why are we doing this?
                                             'bpm'  138.134
                                    'search_title'  'are':2 'doing':4 'this':5 'we':3 'why':1
                                   'search_artist'  'allen':2 'david':1
                                  'search_release'  '8':7,8 'disc':5,6 'done':3 'fast':4 'getting':1 'things':2
                                     'search_rest'  '0nonmusic':1 'gtdfast08':2 'instruction':5 'nonmusic':3 'speech':4
                                    'search_combo'  '0nonmusic':16 '8':14C,15C 'allen':7B 'are':2A 'david':6B 'disc':12C,13C 'doing':4A 'done':10C 'fast':11C 'getting':8C 'gtdfast08':17 'instruction':20 'nonmusic':18 'speech':19 'things':9C 'this':5A 'we':3A 'why':1A
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['free jazz', 'productivity', 'jazz', 'gtd', 'audiobook']
                                        'tag_date'  2002
                                     'discogstags'  ['progressive house', 'electronic']

============================== file details ==============================
                                           'mtime'  1620562206.8940723  (2021-05-09 14:10:06)
                             'size'  1594339