======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '401'
                                          'artist'  'Bathory'
                                     'text_people'  ''
                                         'release'  'Blood on Ice'
                                           'title'  'The Lake'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['thrash metal', 'metal', 'pagan metal', 'black metal', 'viking metal']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '8'
                                      'tracktotal'  '11'
                                            'date'  '1996'
                                        'comments'  ''
                                           'genre'  'eid-metal-trash'
                                             'bpm'  '127.605'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Blood on Ice'
'TBPM' (BPM (beats per minute))                     '127.605'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-trash'
'TDRC' (Recording time)                             '1996'
'TIT2' (Title/songname/content description)         'The Lake'
'TKEY' (Initial key)                                '8A'
'TMED' (Media type)                                 'DIG'
'TPE1' (Lead performer(s)/Soloist(s))               'Bathory'
'TPE2' (Band/orchestra/accompaniment)               'Bathory'
'TPUB' (Publisher)                                  'Morbid Noizz Productions'
'TRCK' (Track number/Position in set)               '8/11'
'TSOP' (Performer sort order)                       'Bathory'
'TXXX:ALBUMARTISTSORT'                              'Bathory'
'TXXX:ASIN'                                         'B000006Z9J'
'TXXX:CATALOGNUMBER'                                '666-12'
'TXXX:MusicBrainz Album Artist Id'                  'd292b4cd-37bd-4a88-a823-8710f273cc31'
'TXXX:MusicBrainz Album Id'                         '22cb3228-1122-4939-b7ed-7870dd419245'
'TXXX:MusicBrainz Album Release Country'            'PL'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        'd292b4cd-37bd-4a88-a823-8710f273cc31'
'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:involved people'                              'producer'
'TXXX:lastfmtags'                                   ['thrash metal', 'metal', 'pagan metal', 'black metal', 'viking metal']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.34 dB'
'TXXX:replaygain_track_peak'                        '0.405642'

========================== row from database ==========================
                                              'id'  1328112
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/Bathory - The Lake - Blood on Ice.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  401
                                           'genre'  eid-metal-trash
                                        'filesize'  6422408
                                           'mtime'  1620311784
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] eid metal trash
                                      'tag_artist'  Bathory
                                     'tag_release'  Blood on Ice
                                       'tag_title'  The Lake
                                             'bpm'  127.605
                                    'search_title'  'lake':2 'the':1
                                   'search_artist'  'bathory':1
                                  'search_release'  'blood':1 'ice':3 'on':2
                                     'search_rest'  '00poprockelectronic':1 'eid':7 'files':5,6 'loose':3,4 'metal':8 'trash':9 'unsorted':2
                                    'search_combo'  '00poprockelectronic':7 'bathory':3B 'blood':4C 'eid':13 'files':11,12 'ice':6C 'lake':2A 'loose':9,10 'metal':14 'on':5C 'the':1A 'trash':15 'unsorted':8
                                    'tag_tracknum'  8
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-3', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-HAP-1', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['thrash metal', 'metal', 'pagan metal', 'black metal', 'viking metal']
                                        'tag_date'  1996
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620311783.7089884  (2021-05-06 16:36:23)
                             'size'  6422408