======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '172'
                                          'artist'  'Muddy Waters'
                                     'text_people'  ''
                                         'release'  'The Best Of Muddy Waters'
                                           'title'  'Hoochie Coochie'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-3', 'Q-LOCALNESS-3', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['delta blues', 'guitar', 'blues', 'chicago blues', 'classic blues']"
                                     'discogstags'  "['blues', 'chicago blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '07'
                                      'tracktotal'  ''
                                            'date'  '1957'
                                        'comments'  ''
                                           'genre'  'prerock-jb-blues'
                                             'bpm'  '143.721'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Best Of Muddy Waters'
'TBPM' (BPM (beats per minute))                     '143.721'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-blues'
'TDOR' (Original release time)                      '1957'
'TDRC' (Recording time)                             '1957'
'TIT2' (Title/songname/content description)         'Hoochie Coochie'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Muddy Waters'
'TRCK' (Track number/Position in set)               '07'
'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:discogstags'                                  ['blues', 'chicago blues']
'TXXX:lastfmtags'                                   ['delta blues', 'guitar', 'blues', 'chicago blues', 'classic blues']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.56 dB'
'TXXX:replaygain_track_peak'                        '0.496802'

========================== row from database ==========================
                                              'id'  672483
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Muddy Waters/MBZ;#Muddy Waters;#The Best Of Muddy Waters;#07;#Hoochie Coochie.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  172
                                           'genre'  prerock-jb-blues
                                        'filesize'  2768682
                                           'mtime'  1620402443
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country MBZ;#Muddy Waters;#The Waters;#07;#Hoochie prerock jb blues
                                      'tag_artist'  Muddy Waters
                                     'tag_release'  The Best Of Muddy Waters
                                       'tag_title'  Hoochie Coochie
                                             'bpm'  143.721
                                    'search_title'  'coochie':2 'hoochie':1
                                   'search_artist'  'muddy':1 'waters':2
                                  'search_release'  'best':2 'muddy':4 'of':3 'the':1 'waters':5
                                     'search_rest'  '07':14,17 'blues':21 'country':4 'exotica':2 'hoochie':15,18 'jazz':1 'jb':20 'mbz':5,7 'muddy':6,8 'oldies':3 'prerock':19 'the':10,12 'waters':9,11,13,16
                                    'search_combo'  '07':23,26 'best':6C 'blues':30 'coochie':2A 'country':13 'exotica':11 'hoochie':1A,24,27 'jazz':10 'jb':29 'mbz':14,16 'muddy':3B,8C,15,17 'of':7C 'oldies':12 'prerock':28 'the':5C,19,21 'waters':4B,9C,18,20,22,25
                                    'tag_tracknum'  7
                                      'num_images'  1
                                             'key'  8A
                                           '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-3', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['delta blues', 'guitar', 'blues', 'chicago blues', 'classic blues']
                                        'tag_date'  1957
                                     'discogstags'  ['blues', 'chicago blues']

============================== file details ==============================
                                           'mtime'  1620402443.0548708  (2021-05-07 17:47:23)
                             'size'  2768682