======================== unified (from filesystem) ========================
                                         'bitrate'  '169.662'
                                        'duration'  '151'
                                          'artist'  'Elmore James'
                                     'text_people'  ''
                                         'release'  'The Best Blues'
                                           'title'  "Rollin' and Tumblin"
                                           'quals'  ("['Q-HAP-3', '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-3', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['blues', 'classic blues', 'chicago blues', 'jazz', 'delta blues']"
                                     'discogstags'  "['electric blues', 'blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1990'
                                        'comments'  ''
                                           'genre'  'prerock-jb-blues-rock'
                                             'bpm'  '105.587'
                                             'key'  '2A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Best Blues'
'TBPM' (BPM (beats per minute))                     '105.587'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-blues-rock'
'TDOR' (Original release time)                      '1990'
'TDRC' (Recording time)                             '1990'
'TIT2' (Title/songname/content description)         "Rollin' and Tumblin"
'TKEY' (Initial key)                                '2A'
'TPE1' (Lead performer(s)/Soloist(s))               'Elmore James'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['electric blues', 'blues']
'TXXX:lastfmtags'                                   ['blues', 'classic blues', 'chicago blues', 'jazz', 'delta blues']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.85 dB'
'TXXX:replaygain_track_peak'                        '0.616211'

========================== row from database ==========================
                                              'id'  1505352
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Elmore James - James Elmore/The Best Blues/Elmore James - Rollin_ and Tumblin.mp3
                                         'working'  None
                                         'bitrate'  169
                                    'duration_sec'  151
                                           'genre'  prerock-jb-blues-rock
                                        'filesize'  3214870
                                           'mtime'  1621627937
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Rollin_ prerock jb blues rock
                                      'tag_artist'  Elmore James
                                     'tag_release'  The Best Blues
                                       'tag_title'  Rollin' and Tumblin
                                             'bpm'  105.587
                                    'search_title'  'and':3 'rollin':1,2 'tumblin':4
                                   'search_artist'  'elmore':1 'james':2
                                  'search_release'  'best':2 'blues':3 'the':1
                                     'search_rest'  'blues':8 'country':4 'exotica':2 'jazz':1 'jb':7 'oldies':3 'prerock':6 'rock':9 'rollin':5
                                    'search_combo'  'and':3A 'best':8C 'blues':9C,17 'country':13 'elmore':5B 'exotica':11 'james':6B 'jazz':10 'jb':16 'oldies':12 'prerock':15 'rock':18 'rollin':1A,2A,14 'the':7C 'tumblin':4A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  2A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-3', 'q-syn-1', 'q-chart-3', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['blues', 'classic blues', 'chicago blues', 'jazz', 'delta blues']
                                        'tag_date'  1990
                                     'discogstags'  ['electric blues', 'blues']

============================== file details ==============================
                                           'mtime'  1621627937.369682  (2021-05-21 22:12:17)
                             'size'  3214870