======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '364'
                                          'artist'  'Celtic Frost'
                                     'text_people'  ''
                                         'release'  'To Mega Therion'
                                           'title'  'Necromantical Screams'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['thrash metal', 'death metal', 'black metal', 'doom metal', 'metal']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  ''
                                            'date'  '1985'
                                        'comments'  ''
                                           'genre'  'eid-metal-trash'
                                             'bpm'  '144.233'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'To Mega Therion'
'TBPM' (BPM (beats per minute))                     '144.233'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-trash'
'TDOR' (Original release time)                      '1985'
'TDRC' (Recording time)                             '1985'
'TIT2' (Title/songname/content description)         'Necromantical Screams'
'TKEY' (Initial key)                                '1A'
'TLEN' (Length)                                     '364512'
'TMED' (Media type)                                 'DIG'
'TPE1' (Lead performer(s)/Soloist(s))               'Celtic Frost'
'TRCK' (Track number/Position in set)               '10'
'TXXX:Q-HAP'                                        '1'
'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'                                   ['thrash metal', 'death metal', 'black metal', 'doom metal', 'metal']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.39 dB'
'TXXX:replaygain_track_peak'                        '0.515735'

========================== row from database ==========================
                                              'id'  1304180
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/Celtic Frost - Necromantical Screams.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  364
                                           'genre'  eid-metal-trash
                                        'filesize'  7299081
                                           'mtime'  1620311784
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] eid metal trash
                                      'tag_artist'  Celtic Frost
                                     'tag_release'  To Mega Therion
                                       'tag_title'  Necromantical Screams
                                             'bpm'  144.233
                                    'search_title'  'necromantical':1 'screams':2
                                   'search_artist'  'celtic':1 'frost':2
                                  'search_release'  'mega':2 'therion':3 'to':1
                                     'search_rest'  '00poprockelectronic':1 'eid':7 'files':5,6 'loose':3,4 'metal':8 'trash':9 'unsorted':2
                                    'search_combo'  '00poprockelectronic':8 'celtic':3B 'eid':14 'files':12,13 'frost':4B 'loose':10,11 'mega':6C 'metal':15 'necromantical':1A 'screams':2A 'therion':7C 'to':5C 'trash':16 'unsorted':9
                                    'tag_tracknum'  10
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-1', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['thrash metal', 'death metal', 'black metal', 'doom metal', 'metal']
                                        'tag_date'  1985
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620311783.7272208  (2021-05-06 16:36:23)
                             'size'  7299081