======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '528'
                                          'artist'  'The Who'
                                     'text_people'  ''
                                         'release'  "Who's Next (disc 1)"
                                           'title'  "Won't Get Fooled Again (New Yo"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-4', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['hard rock', 'rock', '60s', 'british', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '15'
                                      'tracktotal'  ''
                                            'date'  '2003'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic'
                                             'bpm'  '91.391'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     "Who's Next (disc 1)"
'TBPM' (BPM (beats per minute))                     '91.391'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-classic'
'TDRC' (Recording time)                             '2003'
'TIT2' (Title/songname/content description)         "Won't Get Fooled Again (New Yo"
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Who'
'TRCK' (Track number/Position in set)               '15'
'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'                                   ['hard rock', 'rock', '60s', 'british', 'classic rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-1.08 dB'
'TXXX:replaygain_track_peak'                        '0.406361'

========================== row from database ==========================
                                              'id'  1523876
                                            'path'  /data/Music/Bulk/00poprockelectronic/album top 1000/0235 The Who - Who_s Next/CD1/Who_s Next (disc 1)-15-Won_t Get Fooled Again (New York Record Plant session outtake).mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  528
                                           'genre'  rock-cppex-classic
                                        'filesize'  12688837
                                           'mtime'  1636039370
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic album top 1000 0235 Who_s CD1 Who_s 15 Won_t York Record Plant session outtake) rock cppex classic
                                      'tag_artist'  The Who
                                     'tag_release'  Who's Next (disc 1)
                                       'tag_title'  Won't Get Fooled Again (New Yo
                                             'bpm'  91.391
                                    'search_title'  'again':6 'fooled':5 'get':4 'new':7,8 't':2 'won':1 'wont':3 'yo':9
                                   'search_artist'  'the':1 'who':2
                                  'search_release'  '1':7,8 'disc':5,6 'next':4 's':2 'who':1 'whos':3
                                     'search_rest'  '00poprockelectronic':1 '0235':5 '1000':4 'album':2 'cd1':8 'classic':19 'cppex':18 'outtake':15,16 'plant':13 'record':12 'rock':17 's':7 'session':14 't':10 'top':3 'who':6 'won':9 'york':11
                                    'search_combo'  '00poprockelectronic':20 '0235':24 '1':18C,19C '1000':23 'again':6A 'album':21 'cd1':27 'classic':38 'cppex':37 'disc':16C,17C 'fooled':5A 'get':4A 'new':7A,8A 'next':15C 'outtake':34,35 'plant':32 'record':31 'rock':36 's':13C,26 'session':33 't':2A,29 'the':10B 'top':22 'who':11B,12C,25 'whos':14C 'won':1A,28 'wont':3A 'yo':9A 'york':30
                                    'tag_tracknum'  15
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-4', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['hard rock', 'rock', '60s', 'british', 'classic rock']
                                        'tag_date'  2003
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636039369.7434354  (2021-11-04 16:22:49)
                             'size'  12688837