======================== unified (from filesystem) ========================
                                         'bitrate'  '158.264'
                                        'duration'  '404'
                                          'artist'  'Deep Purple'
                                     'text_people'  ''
                                         'release'  'In Concert with the London Symphony Orchestra'
                                           'title'  'Wait a while'
                                           'quals'  ("['Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-1', 'q-other-3', 'q-vocals-4', 'q-mixbeat-1', "
 "'Q-PIANO-3']")
                                      'lastfmtags'  "['heavy metal', 'rock', 'hard rock', 'progressive rock', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  '9'
                                            'date'  '1999'
                                        'comments'  ''
                                           'genre'  'rock-cppex-progressive;eid-metal;rock-cppex'
                                             'bpm'  '145.163'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'In Concert with the London Symphony Orchestra'
'TBPM' (BPM (beats per minute))                     '145.163'
'TCON' (Content type, a.k.a. Genre)                 ['rock-cppex-progressive', 'eid-metal', 'rock-cppex']
'TDRC' (Recording time)                             '1999'
'TIT2' (Title/songname/content description)         'Wait a while'
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Deep Purple'
'TPOS' (Part of a set)                              '1/2'
'TRCK' (Track number/Position in set)               '2/9'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:iTunes_CDDB_IDs'                              '9+350F43BCE221A3797E5E4D88871CED17+768271'
'TXXX:lastfmtags'                                   ['heavy metal', 'rock', 'hard rock', 'progressive rock', 'classic rock']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.41 dB'
'TXXX:replaygain_track_peak'                        '0.725070'
'TXXX:tempo'                                        '00000 BPM'

========================== row from database ==========================
                                              'id'  1338355
                                            'path'  /data/Music/Bulk/00poprockelectronic/Deep Purple/In Concert with the London Symphony Orch/1-02 Wait a while.mp3
                                         'working'  None
                                         'bitrate'  158
                                    'duration_sec'  404
                                           'genre'  rock-cppex-progressive;eid-metal;rock-cppex
                                        'filesize'  8016197
                                           'mtime'  1636038744
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 1 02 rock cppex progressive;eid metal;rock cppex
                                      'tag_artist'  Deep Purple
                                     'tag_release'  In Concert with the London Symphony Orchestra
                                       'tag_title'  Wait a while
                                             'bpm'  145.163
                                    'search_title'  'a':2 'wait':1 'while':3
                                   '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 '1':2 'cppex':4 'eid':6,8 'metal':9,11 'progressive':5,7 'rock':3,10,12
                                    'search_combo'  '00poprockelectronic':13 '1':14 'a':2A 'concert':7C 'cppex':16 'deep':4B 'eid':18,20 'in':6C 'london':10C 'metal':21,23 'orchestra':12C 'progressive':17,19 'purple':5B 'rock':15,22,24 'symphony':11C 'the':9C 'wait':1A 'while':3A 'with':8C
                                    'tag_tracknum'  2
                                      'num_images'  1
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-3', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-1', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['heavy metal', 'rock', 'hard rock', 'progressive rock', 'classic rock']
                                        'tag_date'  1999
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636038744.0740037  (2021-11-04 16:12:24)
                             'size'  8016197