======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '188'
                                          'artist'  'Lucille Bogan'
                                     'text_people'  ''
                                         'release'  '1923-35'
                                           'title'  'Pot Hound Blues'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', "
 "'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']")
                                      'lastfmtags'  "['american', 'blues', 'jazz', 'female vocalists', '1920s']"
                                     'discogstags'  "['blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  '20'
                                            'date'  '1980'
                                        'comments'  ''
                                           'genre'  'set-th-novelty'
                                             'bpm'  '107.265'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            ' 00000BFA 00000031 00006D78'
'COMM:iTunNORM:eng'                                 (' 00000BFA 00000031 00006D78 000026DB 0001A2C6 00017305 000078D0 000070DC '
 '000215C6 000215C6')
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000894 00000000007EBB5C 00000000 00000000 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '20+0BF55DE293556E644CB6E449ED66A585+888699'
'TALB' (Album/Movie/Show title)                     '1923-35'
'TBPM' (BPM (beats per minute))                     '107.265'
'TCON' (Content type, a.k.a. Genre)                 'set-th-novelty'
'TDRC' (Recording time)                             '1980'
'TENC' (Encoded by)                                 'iTunes v5.0.1'
'TIT2' (Title/songname/content description)         'Pot Hound Blues'
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Lucille Bogan'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '6/20'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'blues'
'TXXX:lastfmtags'                                   ['american', 'blues', 'jazz', 'female vocalists', '1920s']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.03 dB'
'TXXX:replaygain_track_peak'                        '0.472666'

========================== row from database ==========================
                                              'id'  761919
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Zimelis [Chow, Baby!]/Lucille Bogan - Pot Hound Blues.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  188
                                           'genre'  set-th-novelty
                                        'filesize'  3770074
                                           'mtime'  1620343087
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Zimelis [Chow, Baby!] set th novelty
                                      'tag_artist'  Lucille Bogan
                                     'tag_release'  1923-35
                                       'tag_title'  Pot Hound Blues
                                             'bpm'  107.265
                                    'search_title'  'blues':3 'hound':2 'pot':1
                                   'search_artist'  'bogan':2 'lucille':1
                                  'search_release'  '1923':1 '192335':3 '35':2
                                     'search_rest'  'baby':8,9 'chow':6,7 'country':4 'exotica':2 'jazz':1 'novelty':12 'oldies':3 'set':10 'th':11 'zimelis':5
                                    'search_combo'  '1923':6C '192335':8C '35':7C 'baby':16,17 'blues':3A 'bogan':5B 'chow':14,15 'country':12 'exotica':10 'hound':2A 'jazz':9 'lucille':4B 'novelty':20 'oldies':11 'pot':1A 'set':18 'th':19 'zimelis':13
                                    'tag_tracknum'  6
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['american', 'blues', 'jazz', 'female vocalists', '1920s']
                                        'tag_date'  1980
                                     'discogstags'  ['blues']

============================== file details ==============================
                                           'mtime'  1620343087.0750043  (2021-05-07 01:18:07)
                             'size'  3770074