======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '162'
                                          'artist'  'Muddy Waters'
                                     'text_people'  ''
                                         'release'  'The Best of Muddy Waters'
                                           'title'  'Trouble No More'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-3', 'Q-LOCALNESS-3', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-2', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['delta blues', 'guitar', 'blues', 'chicago blues', 'classic blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '06'
                                      'tracktotal'  ''
                                            'date'  '1957'
                                        'comments'  ''
                                           'genre'  'prerock-jb-blues'
                                             'bpm'  '145.895'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Best of Muddy Waters'
'TBPM' (BPM (beats per minute))                     '145.895'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-blues'
'TDOR' (Original release time)                      '1957'
'TDRC' (Recording time)                             '1957'
'TIT2' (Title/songname/content description)         'Trouble No More'
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'Muddy Waters'
'TRCK' (Track number/Position in set)               '06'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['delta blues', 'guitar', 'blues', 'chicago blues', 'classic blues']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.30 dB'
'TXXX:replaygain_track_peak'                        '0.401126'

========================== row from database ==========================
                                              'id'  670957
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Muddy Waters/MBZ;#Muddy Waters;#The Best of Muddy Waters;#06;#Trouble No More.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  162
                                           'genre'  prerock-jb-blues
                                        'filesize'  2604967
                                           'mtime'  1620402443
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country MBZ;#Muddy Waters;#The Waters;#06;#Trouble prerock jb blues
                                      'tag_artist'  Muddy Waters
                                     'tag_release'  The Best of Muddy Waters
                                       'tag_title'  Trouble No More
                                             'bpm'  145.895
                                    'search_title'  'more':3 'no':2 'trouble':1
                                   'search_artist'  'muddy':1 'waters':2
                                  'search_release'  'best':2 'muddy':4 'of':3 'the':1 'waters':5
                                     'search_rest'  '06':14,17 'blues':21 'country':4 'exotica':2 'jazz':1 'jb':20 'mbz':5,7 'muddy':6,8 'oldies':3 'prerock':19 'the':10,12 'trouble':15,18 'waters':9,11,13,16
                                    'search_combo'  '06':24,27 'best':7C 'blues':31 'country':14 'exotica':12 'jazz':11 'jb':30 'mbz':15,17 'more':3A 'muddy':4B,9C,16,18 'no':2A 'of':8C 'oldies':13 'prerock':29 'the':6C,20,22 'trouble':1A,25,28 'waters':5B,10C,19,21,23,26
                                    'tag_tracknum'  6
                                      'num_images'  1
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-2', 'q-syn-1', 'q-chart-3', 'q-other-2', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['delta blues', 'guitar', 'blues', 'chicago blues', 'classic blues']
                                        'tag_date'  1957
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620402443.1113718  (2021-05-07 17:47:23)
                             'size'  2604967