======================== unified (from filesystem) ========================
                                         'bitrate'  '320.002'
                                        'duration'  '303'
                                          'artist'  'Apparat Organ Quartet'
                                     'text_people'  ''
                                         'release'  'progsoup 49'
                                           'title'  '123 Forever'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['indie', 'iceland', 'icelandic', 'electronic', 'experimental']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '28'
                                      'tracktotal'  ''
                                            'date'  '1975'
                                        'comments'  ''
                                           'genre'  'rock-cppex-progressive'
                                             'bpm'  '108.762'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'progsoup 49'
'TBPM' (BPM (beats per minute))                     '108.762'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-progressive'
'TDRC' (Recording time)                             '1975'
'TIT2' (Title/songname/content description)         '123 Forever'
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'Apparat Organ Quartet'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '28'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['indie', 'iceland', 'icelandic', 'electronic', 'experimental']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.95 dB'
'TXXX:replaygain_track_peak'                        '0.436197'

========================== row from database ==========================
                                              'id'  1411318
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/PROGSOUP/progsoup 49/2793 apparat organ quartet - 123 forever.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  303
                                           'genre'  rock-cppex-progressive
                                        'filesize'  12136274
                                           'mtime'  1620737515
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy PROGSOUP 2793 apparat organ quartet forever rock cppex progressive
                                      'tag_artist'  Apparat Organ Quartet
                                     'tag_release'  progsoup 49
                                       'tag_title'  123 Forever
                                             'bpm'  108.762
                                    'search_title'  '123':1 'forever':2
                                   'search_artist'  'apparat':1 'organ':2 'quartet':3
                                  'search_release'  '49':2 'progsoup':1
                                     'search_rest'  '2793':3 'apparat':4 'classicprogpsy':1 'cppex':9 'forever':7 'organ':5 'progressive':10 'progsoup':2 'quartet':6 'rock':8
                                    'search_combo'  '123':1A '2793':10 '49':7C 'apparat':3B,11 'classicprogpsy':8 'cppex':16 'forever':2A,14 'organ':4B,12 'progressive':17 'progsoup':6C,9 'quartet':5B,13 'rock':15
                                    'tag_tracknum'  28
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['indie', 'iceland', 'icelandic', 'electronic', 'experimental']
                                        'tag_date'  1975
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1620737514.6988633  (2021-05-11 14:51:54)
                             'size'  12136274