======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '134'
                                          'artist'  'Georges Bizet'
                                     'text_people'  ''
                                         'release'  '100 Masterpieces Of Classical'
                                           'title'  'Carmen-Suite, Aragonaise'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-2', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['opera', 'composers', 'french', 'romantic', 'classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '85.273'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '100 Masterpieces Of Classical'
'TBPM' (BPM (beats per minute))                     '85.273'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TIT2' (Title/songname/content description)         'Carmen-Suite, Aragonaise'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Georges Bizet'
'TRCK' (Track number/Position in set)               '2'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['opera', 'composers', 'french', 'romantic', 'classical']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.88 dB'
'TXXX:replaygain_track_peak'                        '0.947260'

========================== row from database ==========================
                                              'id'  190507
                                            'path'  /data/Music/Bulk/00instruments-classical/Georges Bizet/MBZ;#Georges Bizet;#100 Masterpieces Of Classical Music, Volume 4;#02;#Carmen-Suite, Aragonaise.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  134
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  2149387
                                           'mtime'  1620561559
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical MBZ;#Georges Bizet;#100 Music, Volume 4;#02;#Carmen prerock classical classical instruments
                                      'tag_artist'  Georges Bizet
                                     'tag_release'  100 Masterpieces Of Classical
                                       'tag_title'  Carmen-Suite, Aragonaise
                                             'bpm'  85.273
                                    'search_title'  'aragonaise':4 'carmen':1 'carmensuite':3 'suite':2
                                   'search_artist'  'bizet':2 'georges':1
                                  'search_release'  '100':1 'classical':4 'masterpieces':2 'of':3
                                     'search_rest'  '00instruments':1 '02':15,18 '100':8,10 '4':14,17 'bizet':7,9 'carmen':16,19 'classical':2 'georges':4,6 'instruments':21 'mbz':3,5 'music':11,12 'prerock':20 'volume':13
                                    'search_combo'  '00instruments':11 '02':25,28 '100':7C,18,20 '4':24,27 'aragonaise':4A 'bizet':6B,17,19 'carmen':1A,26,29 'carmensuite':3A 'classical':10C,12 'georges':5B,14,16 'instruments':31 'masterpieces':8C 'mbz':13,15 'music':21,22 'of':9C 'prerock':30 'suite':2A 'volume':23
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-2', 'q-syn-1', 'q-chart-3', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['opera', 'composers', 'french', 'romantic', 'classical']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561558.7321095  (2021-05-09 13:59:18)
                             'size'  2149387