======================== unified (from filesystem) ========================
                                         'bitrate'  '202.861'
                                        'duration'  '139'
                                          'artist'  'R.E.M.'
                                     'text_people'  ''
                                         'release'  'Supernatural Superserious'
                                           'title'  'Airliner (Non-Album Track)'
                                           'quals'  ("['Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-OLDST-3', 'Q-LOCALNESS-1', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-4', "
 "'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-1', 'q-mixbeat-2']")
                                      'lastfmtags'  "['alternative rock', 'indie', 'alternative', 'pop', 'rock']"
                                     'discogstags'  "['rock', 'pop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '2008'
                                        'comments'  ''
                                           'genre'  'rock-unsorted'
                                             'bpm'  '109.231'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Supernatural Superserious'
'TBPM' (BPM (beats per minute))                     '109.231'
'TCON' (Content type, a.k.a. Genre)                 'rock-unsorted'
'TDRC' (Recording time)                             '2008'
'TIT2' (Title/songname/content description)         'Airliner (Non-Album Track)'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'R.E.M.'
'TRCK' (Track number/Position in set)               '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'pop']
'TXXX:lastfmtags'                                   ['alternative rock', 'indie', 'alternative', 'pop', 'rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'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'                        '-2.02 dB'
'TXXX:replaygain_track_peak'                        '0.367124'

========================== row from database ==========================
                                              'id'  1318916
                                            'path'  /data/Music/Bulk/00poprockelectronic/B-Sides/0102 R.E.M. - Airliner (B).mp3
                                         'working'  None
                                         'bitrate'  202
                                    'duration_sec'  139
                                           'genre'  rock-unsorted
                                        'filesize'  3534210
                                           'mtime'  1620389215
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic B Sides 0102 (B) rock unsorted
                                      'tag_artist'  R.E.M.
                                     'tag_release'  Supernatural Superserious
                                       'tag_title'  Airliner (Non-Album Track)
                                             'bpm'  109.231
                                    'search_title'  'airliner':1 'album':3 'non':2 'nonalbum':4 'track':5,6
                                   'search_artist'  'e':2 'm':3 'r':1 'rem':4
                                  'search_release'  'supernatural':1 'superserious':2
                                     'search_rest'  '00poprockelectronic':1 '0102':4 'b':2,5 'rock':6 'sides':3 'unsorted':7
                                    'search_combo'  '00poprockelectronic':13 '0102':16 'airliner':1A 'album':3A 'b':14,17 'e':8B 'm':9B 'non':2A 'nonalbum':4A 'r':7B 'rem':10B 'rock':18 'sides':15 'supernatural':11C 'superserious':12C 'track':5A,6A 'unsorted':19
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['alternative rock', 'indie', 'alternative', 'pop', 'rock']
                                        'tag_date'  2008
                                     'discogstags'  ['rock', 'pop']

============================== file details ==============================
                                           'mtime'  1620389214.7904296  (2021-05-07 14:06:54)
                             'size'  3534210