======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '350'
                                          'artist'  'Caravan'
                                     'text_people'  ''
                                         'release'  'progsoup 12'
                                           'title'  'Back To Herne Bay Front'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['progressive', 'canterbury scene', 'canterbury', 'rock', 'progressive "
 "rock', 'classic rock']")
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '9'
                                      'tracktotal'  ''
                                            'date'  '1982'
                                        'comments'  ''
                                           'genre'  'rock-cppex-progressive;set-pl-progspace'
                                             'bpm'  '137.106'
                                             'key'  '1B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'progsoup 12'
'TBPM' (BPM (beats per minute))                     '137.106'
'TCON' (Content type, a.k.a. Genre)                 ['rock-cppex-progressive', 'set-pl-progspace']
'TDRC' (Recording time)                             '1982'
'TIT2' (Title/songname/content description)         'Back To Herne Bay Front'
'TKEY' (Initial key)                                '1B'
'TPE1' (Lead performer(s)/Soloist(s))               'Caravan'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '9'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['progressive',
 'canterbury scene',
 'canterbury',
 'rock',
 'progressive rock',
 'classic rock']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'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'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.66 dB'
'TXXX:replaygain_track_peak'                        '0.944635'

========================== row from database ==========================
                                              'id'  1415120
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/PROGSOUP/Progsoup 12/656 caravan - back to herne bay front.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  350
                                           'genre'  rock-cppex-progressive;set-pl-progspace
                                        'filesize'  7013557
                                           'mtime'  1620736290
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy PROGSOUP Progsoup 656 caravan back to herne bay front rock cppex progressive;set pl progspace
                                      'tag_artist'  Caravan
                                     'tag_release'  progsoup 12
                                       'tag_title'  Back To Herne Bay Front
                                             'bpm'  137.106
                                    'search_title'  'back':1 'bay':4 'front':5 'herne':3 'to':2
                                   'search_artist'  'caravan':1
                                  'search_release'  'progsoup':1
                                     'search_rest'  '656':3 'back':5 'bay':8 'caravan':4 'classicprogpsy':1 'cppex':11 'front':9 'herne':7 'pl':16 'progressive':12,14 'progsoup':2 'progspace':17 'rock':10 'set':13,15 'to':6
                                    'search_combo'  '656':10 'back':1A,12 'bay':4A,15 'caravan':6B,11 'classicprogpsy':8 'cppex':18 'front':5A,16 'herne':3A,14 'pl':23 'progressive':19,21 'progsoup':7C,9 'progspace':24 'rock':17 'set':20,22 'to':2A,13
                                    'tag_tracknum'  9
                                      'num_images'  0
                                             'key'  1B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['progressive', 'canterbury scene', 'canterbury', 'rock', 'progressive rock', 'classic rock']
                                        'tag_date'  1982
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620736290.4605913  (2021-05-11 14:31:30)
                             'size'  7013557