======================== unified (from filesystem) ========================
                                         'bitrate'  '122.384'
                                        'duration'  '256'
                                          'artist'  'John Williams & Boston Pops'
                                     'text_people'  ''
                                         'release'  'Pops In Space'
                                           'title'  'Empire: Asteroid Field'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'q-syn-1', 'q-bass-1', "
 "'q-busy-2', 'q-grit-2', 'q-play-3', 'Q-OLDST-1', 'q-chart-3', 'q-drums-3', "
 "'q-other-4', 'q-piano-1', 'q-vocals-1', 'Q-HHRNBTT-1', 'q-mixbeat-1']")
                                      'lastfmtags'  "['xmas', 'ironman christmas', 'instrumental', 'classical', 'game music']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1980'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '113.5'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Pops In Space'
'TBPM' (BPM (beats per minute))                     '113.5'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '1980'
'TIT2' (Title/songname/content description)         'Empire: Asteroid Field'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'John Williams & Boston Pops'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['xmas', 'ironman christmas', 'instrumental', 'classical', 'game music']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'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'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.65 dB'
'TXXX:replaygain_track_peak'                        '0.644962'

========================== row from database ==========================
                                              'id'  1213776
                                            'path'  /data/Music/Bulk/00instruments-classical/John Williams/John_Williams_&_Boston_Pops_-_Asteroid_Field.mp3
                                         'working'  None
                                         'bitrate'  122
                                    'duration_sec'  256
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  3919166
                                           'mtime'  1620561589
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical John_Williams_&_Boston_Pops_ _Asteroid_Field prerock classical or classical instruments
                                      'tag_artist'  John Williams & Boston Pops
                                     'tag_release'  Pops In Space
                                       'tag_title'  Empire: Asteroid Field
                                             'bpm'  113.5
                                    'search_title'  'asteroid':3 'empire':1,2 'field':4
                                   'search_artist'  'boston':3 'john':1 'pops':4 'williams':2
                                  'search_release'  'in':2 'pops':1 'space':3
                                     'search_rest'  '00instruments':1 'asteroid':11 'boston':5,9 'classical':2 'field':12 'instruments':15 'john':3,7 'or':14 'pops':6,10 'prerock':13 'williams':4,8
                                    'search_combo'  '00instruments':12 'asteroid':3A,22 'boston':7B,16,20 'classical':13 'empire':1A,2A 'field':4A,23 'in':10C 'instruments':26 'john':5B,14,18 'or':25 'pops':8B,9C,17,21 'prerock':24 'space':11C 'williams':6B,15,19
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-3', 'q-syn-1', 'q-chart-3', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['xmas', 'ironman christmas', 'instrumental', 'classical', 'game music']
                                        'tag_date'  1980
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561589.0686123  (2021-05-09 13:59:49)
                             'size'  3919166