======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '136'
                                          'artist'  'USSR Melodia Recording'
                                     'text_people'  ''
                                         'release'  'How Stereo Works'
                                           'title'  'Effect Of Being There'
                                           'quals'  ("['Q-HAP-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-2', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'nonmusic-speech-instruction'
                                             'bpm'  '106.756'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'How Stereo Works'
'TBPM' (BPM (beats per minute))                     '106.756'
'TCON' (Content type, a.k.a. Genre)                 'nonmusic-speech-instruction'
'TIT2' (Title/songname/content description)         'Effect Of Being There'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'USSR Melodia Recording'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'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'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+5.11 dB'
'TXXX:replaygain_track_peak'                        '0.925984'
'TXXX:tracknum'                                     '006'

========================== row from database ==========================
                                              'id'  483638
                                            'path'  /data/Music/Bulk/0nonmusic/USSR Melodia Recording ¨.¨ How Stereo works ¨.¨ [192k]/006_Unknown Artist - How Stereo Works ~ Effect Of Being There.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  136
                                           'genre'  nonmusic-speech-instruction
                                        'filesize'  3266673
                                           'mtime'  1620562243
                                   'redo_metaread'  0
                                        'rest_str'   0nonmusic ¨.¨ works ¨.¨ [192k] 006_Unknown Artist ~ nonmusic speech instruction
                                      'tag_artist'  USSR Melodia Recording
                                     'tag_release'  How Stereo Works
                                       'tag_title'  Effect Of Being There
                                             'bpm'  106.756
                                    'search_title'  'being':3 'effect':1 'of':2 'there':4
                                   'search_artist'  'melodia':2 'recording':3 'ussr':1
                                  'search_release'  'how':1 'stereo':2 'works':3
                                     'search_rest'  '006':5 '0nonmusic':1 '192k':3,4 'artist':7 'instruction':10 'nonmusic':8 'speech':9 'unknown':6 'works':2
                                    'search_combo'  '006':15 '0nonmusic':11 '192k':13,14 'artist':17 'being':3A 'effect':1A 'how':8C 'instruction':20 'melodia':6B 'nonmusic':18 'of':2A 'recording':7B 'speech':19 'stereo':9C 'there':4A 'unknown':16 'ussr':5B 'works':10C,12
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620562242.964024  (2021-05-09 14:10:42)
                             'size'  3266673