======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '274'
                                          'artist'  'Jethro Tull'
                                     'text_people'  ''
                                         'release'  "Too Old to Rock 'N' Roll: Too Young To Die!"
                                           'title'  'Pied Piper'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-3', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['folk rock', 'rock', 'progressive rock', 'progressive', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '9'
                                      'tracktotal'  ''
                                            'date'  '1976'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic;rock-cppex-progressive'
                                             'bpm'  '84.140'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     "Too Old to Rock 'N' Roll: Too Young To Die!"
'TBPM' (BPM (beats per minute))                     '84.140'
'TCON' (Content type, a.k.a. Genre)                 ['rock-cppex-classic', 'rock-cppex-progressive']
'TDRC' (Recording time)                             '1976'
'TIT2' (Title/songname/content description)         'Pied Piper'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Jethro Tull'
'TRCK' (Track number/Position in set)               '9'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['folk rock', 'rock', 'progressive rock', 'progressive', 'classic rock']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+11.71 dB'
'TXXX:replaygain_track_peak'                        '0.271591'

========================== row from database ==========================
                                              'id'  1526063
                                            'path'  /data/Music/Bulk/00poprockelectronic/Jethro Tull/Jethro Tull - 1976 - Too Old To Rock _n_ Roll Too Young To Die!/09 - Pied Piper.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  274
                                           'genre'  rock-cppex-classic;rock-cppex-progressive
                                        'filesize'  5500796
                                           'mtime'  1636039259
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 1976 _n_ 09 rock cppex classic;rock cppex progressive
                                      'tag_artist'  Jethro Tull
                                     'tag_release'  Too Old to Rock 'N' Roll: Too Young To Die!
                                       'tag_title'  Pied Piper
                                             'bpm'  84.14
                                    'search_title'  'pied':1 'piper':2
                                   'search_artist'  'jethro':1 'tull':2
                                  'search_release'  'die':10 'n':5,6 'old':2 'rock':4 'roll':7,8 'to':3 'too':1 'young':9
                                     'search_rest'  '00poprockelectronic':1 '1976':2 'classic':6,8 'cppex':5 'n':3 'progressive':10 'rock':4,7,9
                                    'search_combo'  '00poprockelectronic':15 '1976':16 'classic':20,22 'cppex':19 'die':14C 'jethro':3B 'n':9C,10C,17 'old':6C 'pied':1A 'piper':2A 'progressive':24 'rock':8C,18,21,23 'roll':11C,12C 'to':7C 'too':5C 'tull':4B 'young':13C
                                    'tag_tracknum'  9
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-3']
                                      'lastfmtags'  ['folk rock', 'rock', 'progressive rock', 'progressive', 'classic rock']
                                        'tag_date'  1976
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636039259.088797  (2021-11-04 16:20:59)
                             'size'  5500796