======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '241'
                                          'artist'  'Bruce Haack'
                                     'text_people'  ''
                                         'release'  'Electric Lucifer, Book 2'
                                           'title'  'Ancient Mariner'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['electronica', 'space age pop', 'electronic', 'psychedelic', 'experimental']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '02'
                                      'tracktotal'  ''
                                            'date'  '1979'
                                        'comments'  ''
                                           'genre'  'electronic-experimental'
                                             'bpm'  '125.2'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Electric Lucifer, Book 2'
'TBPM' (BPM (beats per minute))                     '125.2'
'TCON' (Content type, a.k.a. Genre)                 'electronic-experimental'
'TDRC' (Recording time)                             '1979'
'TIT2' (Title/songname/content description)         'Ancient Mariner'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Bruce Haack'
'TRCK' (Track number/Position in set)               '02'
'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'                                  'electronic'
'TXXX:lastfmtags'                                   ['electronica', 'space age pop', 'electronic', 'psychedelic', 'experimental']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.63 dB'
'TXXX:replaygain_track_peak'                        '0.690616'

========================== row from database ==========================
                                              'id'  918779
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Bruce Haack/1979 - Bruce Haack - The Electric Lucifer Book 2 (unreleased) [128k-256k]/Bruce Haack - 02 - Ancient Mariner.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  241
                                           'genre'  electronic-experimental
                                        'filesize'  7762939
                                           'mtime'  1622801507
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm 1979 The (unreleased) [128k 256k] 02 electronic experimental
                                      'tag_artist'  Bruce Haack
                                     'tag_release'  Electric Lucifer, Book 2
                                       'tag_title'  Ancient Mariner
                                             'bpm'  125.2
                                    'search_title'  'ancient':1 'mariner':2
                                   'search_artist'  'bruce':1 'haack':2
                                  'search_release'  '2':5 'book':4 'electric':1 'lucifer':2,3
                                     'search_rest'  '128k':5,6 '1979':1 '256k':7,8 'electronic':9 'experimental':10 'the':2 'unreleased':3,4
                                    'search_combo'  '128k':14,15 '1979':10 '2':9C '256k':16,17 'ancient':1A 'book':8C 'bruce':3B 'electric':5C 'electronic':18 'experimental':19 'haack':4B 'lucifer':6C,7C 'mariner':2A 'the':11 'unreleased':12,13
                                    'tag_tracknum'  2
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-3', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['electronica', 'space age pop', 'electronic', 'psychedelic', 'experimental']
                                        'tag_date'  1979
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1622801507.4103048  (2021-06-04 12:11:47)
                             'size'  7762939