<pre>
======================== unified (from filesystem) ========================
                                         'bitrate'  '164.987'
                                        'duration'  '1183'
                                          'artist'  'Deep Purple'
                                     'text_people'  'Jon Lord'
                                         'release'  'In Concert With The London Symphony Orchestra'
                                           'title'  'Concerto For Group And Orchestra - Movement II'
                                           'quals'  ("['Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['heavy metal', 'rock', 'hard rock', 'progressive rock', 'classic rock']"
                                     'discogstags'  "['prog rock', 'classic rock', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  '7'
                                            'date'  '1999'
                                        'comments'  ''
                                           'genre'  'rock-cppex-progressive;eid-metal;rock-cppex'
                                             'bpm'  '138.702'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================<mutagen.mp3.MPEGInfo object at 0x7f954215a5e0>

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''<br/>                                     <img style="width:150px" src="image?fid=1313281"/>
'TALB' (Album/Movie/Show title)                     'In Concert With The London Symphony Orchestra'
'TBPM' (BPM (beats per minute))                     '138.702'
'TCOM' (Composer)                                   'Jon Lord'
'TCON' (Content type, a.k.a. Genre)                 ['rock-cppex-progressive', 'eid-metal', 'rock-cppex']
'TDRC' (Recording time)                             '1999'
'TIT2' (Title/songname/content description)         'Concerto For Group And Orchestra - Movement II'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Deep Purple'
'TPOS' (Part of a set)                              '2/2'
'TRCK' (Track number/Position in set)               '2/7'
'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:discogstags'                                  ['prog rock', 'classic rock', 'rock']
'TXXX:iTunes_CDDB_IDs'                              '7+496EE9ADC8FE5583AA10605E9D7BE78B+638635'
'TXXX:lastfmtags'                                   ['heavy metal', 'rock', 'hard rock', 'progressive rock', 'classic rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+0.95 dB'
'TXXX:replaygain_track_peak'                        '0.631331'
'TXXX:tempo'                                        '00000 BPM'

========================== row from database ==========================
                                              'id'  1313281
                                            'path'  /data/Music/Bulk/00poprockelectronic/Deep Purple/In Concert with the London Symphony Orch/2-02 Concerto For Group And Orchestr.mp3
                                         'working'  None
                                         'bitrate'  164
                                    'duration_sec'  1183
                                           'genre'  rock-cppex-progressive;eid-metal;rock-cppex
                                        'filesize'  24431997
                                           'mtime'  1636038749
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic with the 2 02 rock cppex progressive;eid metal;rock cppex
                                      'tag_artist'  Deep Purple
                                     'tag_release'  In Concert With The London Symphony Orchestra
                                       'tag_title'  Concerto For Group And Orchestra - Movement II
                                             'bpm'  138.702
                                    'search_title'  'and':4 'concerto':1 'for':2 'group':3 'ii':7 'movement':6 'orchestra':5
                                   'search_artist'  'deep':1 'purple':2
                                  'search_release'  'concert':2 'in':1 'london':5 'orchestra':7 'symphony':6 'the':4 'with':3
                                     'search_rest'  '00poprockelectronic':1 '2':4 'cppex':6 'eid':8,10 'metal':11,13 'progressive':7,9 'rock':5,12,14 'the':3 'with':2
                                    'search_combo'  '00poprockelectronic':17 '2':20 'and':4A 'concert':11C 'concerto':1A 'cppex':22 'deep':8B 'eid':24,26 'for':2A 'group':3A 'ii':7A 'in':10C 'london':14C 'metal':27,29 'movement':6A 'orchestra':5A,16C 'progressive':23,25 'purple':9B 'rock':21,28,30 'symphony':15C 'the':13C,19 'with':12C,18
                                    'tag_tracknum'  2
                                      'num_images'  1
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', '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-HAP-1', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['heavy metal', 'rock', 'hard rock', 'progressive rock', 'classic rock']
                                        'tag_date'  1999
                                     'discogstags'  ['prog rock', 'classic rock', 'rock']

============================== file details ==============================
                                           'mtime'  1636038748.8754792  (2021-11-04 16:12:28)
                             'size'  24431997