======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '279'
                                          'artist'  'System of a Down'
                                     'text_people'  ''
                                         'release'  'Nativity in Black 2'
                                           'title'  'Snowblind'
                                           'quals'  ("['Q-HAP-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-OLDST-3', 'Q-JZFKS-1', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['alternative metal', 'alternative', 'metal', 'nu metal', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '05'
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'eid-unsorted'
                                             'bpm'  '145.476'
                                             'key'  '5A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Nativity in Black 2'
'TBPM' (BPM (beats per minute))                     '145.476'
'TCON' (Content type, a.k.a. Genre)                 'eid-unsorted'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'Snowblind'
'TKEY' (Initial key)                                '5A'
'TLEN' (Length)                                     '279745'
'TMED' (Media type)                                 'DIG'
'TPE1' (Lead performer(s)/Soloist(s))               'System of a Down'
'TRCK' (Track number/Position in set)               '05'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['alternative metal', 'alternative', 'metal', 'nu metal', 'rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.62 dB'
'TXXX:replaygain_track_peak'                        '0.510322'

========================== row from database ==========================
                                              'id'  1316623
                                            'path'  /data/Music/Bulk/00poprockelectronic/System Of A Down/Nativity in Black 2/System of A Down - Snowblind - 05.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  279
                                           'genre'  eid-unsorted
                                        'filesize'  4476800
                                           'mtime'  1620521326
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Of A A 05 eid unsorted
                                      'tag_artist'  System of a Down
                                     'tag_release'  Nativity in Black 2
                                       'tag_title'  Snowblind
                                             'bpm'  145.476
                                    'search_title'  'snowblind':1
                                   'search_artist'  'a':3 'down':4 'of':2 'system':1
                                  'search_release'  '2':4 'black':3 'in':2 'nativity':1
                                     'search_rest'  '00poprockelectronic':1 'a':3 'eid':4 'of':2 'unsorted':5
                                    'search_combo'  '00poprockelectronic':10 '2':9C 'a':4B,12 'black':8C 'down':5B 'eid':13 'in':7C 'nativity':6C 'of':3B,11 'snowblind':1A 'system':2B 'unsorted':14
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  5A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-HAP-1', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['alternative metal', 'alternative', 'metal', 'nu metal', 'rock']
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620521325.8567896  (2021-05-09 02:48:45)
                             'size'  4476800