======================== unified (from filesystem) ========================
                                         'bitrate'  '64.0'
                                        'duration'  '438'
                                          'artist'  '[unknown]'
                                     'text_people'  ''
                                         'release'  'The University of Iowa - Moog Synthesizer Demo (1979)'
                                           'title'  'Subaudio Oscillatr Cont'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-3', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1979'
                                        'comments'  ''
                                           'genre'  'nonmusic-speech-instruction'
                                             'bpm'  '126.331'
                                             'key'  '2A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The University of Iowa - Moog Synthesizer Demo (1979)'
'TBPM' (BPM (beats per minute))                     '126.331'
'TCON' (Content type, a.k.a. Genre)                 'nonmusic-speech-instruction'
'TDRC' (Recording time)                             '1979'
'TIT2' (Title/songname/content description)         'Subaudio Oscillatr Cont'
'TKEY' (Initial key)                                '2A'
'TPE1' (Lead performer(s)/Soloist(s))               '[unknown]'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.35 dB'
'TXXX:replaygain_track_peak'                        '0.808446'
'TXXX:tracknum'                                     '07'

========================== row from database ==========================
                                              'id'  483964
                                            'path'  /data/Music/Bulk/0nonmusic/The University of Iowa - Moog Synthesizer Demo (1979) [64k]/07. Subaudio Oscillatr Cont.mp3
                                         'working'  None
                                         'bitrate'  64
                                    'duration_sec'  438
                                           'genre'  nonmusic-speech-instruction
                                        'filesize'  3511029
                                           'mtime'  1620562237
                                   'redo_metaread'  0
                                        'rest_str'   0nonmusic [64k] 07. nonmusic speech instruction
                                      'tag_artist'  [unknown]
                                     'tag_release'  The University of Iowa - Moog Synthesizer Demo (1979)
                                       'tag_title'  Subaudio Oscillatr Cont
                                             'bpm'  126.331
                                    'search_title'  'cont':3 'oscillatr':2 'subaudio':1
                                   'search_artist'  'unknown':1,2
                                  'search_release'  '1979':8,9 'demo':7 'iowa':4 'moog':5 'of':3 'synthesizer':6 'the':1 'university':2
                                     'search_rest'  '07':4,5 '0nonmusic':1 '64k':2,3 'instruction':8 'nonmusic':6 'speech':7
                                    'search_combo'  '07':18,19 '0nonmusic':15 '1979':13C,14C '64k':16,17 'cont':3A 'demo':12C 'instruction':22 'iowa':9C 'moog':10C 'nonmusic':20 'of':8C 'oscillatr':2A 'speech':21 'subaudio':1A 'synthesizer':11C 'the':6C 'university':7C 'unknown':4B,5B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  2A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-3', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['mysterious', 'unknown', 'all', 'mistagged artist', 'rock']
                                        'tag_date'  1979
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620562236.9198124  (2021-05-09 14:10:36)
                             'size'  3511029