======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '283'
                                          'artist'  'Amon Amarth'
                                     'text_people'  ''
                                         'release'  'Once Sent From the Golden Hall'
                                           'title'  'Friends of the Suncross'
                                           'quals'  ("['Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-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-4', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['swedish', 'death metal', 'melodic death metal', 'viking metal', 'metal']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  ''
                                            'date'  '1997'
                                        'comments'  ''
                                           'genre'  'eid-metal'
                                             'bpm'  '136.276'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            'C:\\Program Files\\MusicMatch'
'COMM:MusicMatch_Path:XXX'                          'C:\\Program Files\\MusicMatch Jukebox 3\\MUSIC\\Friends of the Suncross.mp3'
'COMM:MusicMatch_Serial:XXX'                        '91FC40'
'TALB' (Album/Movie/Show title)                     'Once Sent From the Golden Hall'
'TBPM' (BPM (beats per minute))                     '136.276'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal'
'TDRC' (Recording time)                             '1997'
'TIT2' (Title/songname/content description)         'Friends of the Suncross'
'TKEY' (Initial key)                                '8A'
'TLEN' (Length)                                     '282000'
'TPE1' (Lead performer(s)/Soloist(s))               'Amon Amarth'
'TRCK' (Track number/Position in set)               '5'
'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'                                   ['swedish', 'death metal', 'melodic death metal', 'viking metal', 'metal']
'TXXX:original release date'                        ['1998', '1997']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-1.79 dB'
'TXXX:replaygain_track_peak'                        '0.434116'

========================== row from database ==========================
                                              'id'  1287699
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/amon amarth - friends of the suncross.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  283
                                           'genre'  eid-metal
                                        'filesize'  4532224
                                           'mtime'  1620301850
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] amon amarth friends suncross eid metal
                                      'tag_artist'  Amon Amarth
                                     'tag_release'  Once Sent From the Golden Hall
                                       'tag_title'  Friends of the Suncross
                                             'bpm'  136.276
                                    'search_title'  'friends':1 'of':2 'suncross':4 'the':3
                                   'search_artist'  'amarth':2 'amon':1
                                  'search_release'  'from':3 'golden':5 'hall':6 'once':1 'sent':2 'the':4
                                     'search_rest'  '00poprockelectronic':1 'amarth':8 'amon':7 'eid':11 'files':5,6 'friends':9 'loose':3,4 'metal':12 'suncross':10 'unsorted':2
                                    'search_combo'  '00poprockelectronic':13 'amarth':6B,20 'amon':5B,19 'eid':23 'files':17,18 'friends':1A,21 'from':9C 'golden':11C 'hall':12C 'loose':15,16 'metal':24 'of':2A 'once':7C 'sent':8C 'suncross':4A,22 'the':3A,10C 'unsorted':14
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', '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-4', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-1', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['swedish', 'death metal', 'melodic death metal', 'viking metal', 'metal']
                                        'tag_date'  1997
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620301849.6767328  (2021-05-06 13:50:49)
                             'size'  4532224