======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '220'
                                          'artist'  'Chris Barber'
                                     'text_people'  ''
                                         'release'  'Chris Barber  JB'
                                           'title'  'Down by the riverside'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-3', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-1', 'q-play-3', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'trad jazz', 'blues', 'jazz', 'dixieland']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-o-dixiestyle'
                                             'bpm'  '100.856'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Chris Barber  JB'
'TBPM' (BPM (beats per minute))                     '100.856'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-o-dixiestyle'
'TIT2' (Title/songname/content description)         'Down by the riverside'
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Chris Barber'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['instrumental', 'trad jazz', 'blues', 'jazz', 'dixieland']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.11 dB'
'TXXX:replaygain_track_peak'                        '0.757517'

========================== row from database ==========================
                                              'id'  670604
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Dixieland/Chris Barber__Down by the riverside.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  220
                                           'genre'  prerock-jb-jazz-o-dixiestyle
                                        'filesize'  4406046
                                           'mtime'  1620528465
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Dixieland Barber__Down prerock jb jazz dixiestyle
                                      'tag_artist'  Chris Barber
                                     'tag_release'  Chris Barber  JB
                                       'tag_title'  Down by the riverside
                                             'bpm'  100.856
                                    'search_title'  'by':2 'down':1 'riverside':4 'the':3
                                   'search_artist'  'barber':2 'chris':1
                                  'search_release'  'barber':2 'chris':1 'jb':3
                                     'search_rest'  'barber':6 'country':4 'dixieland':5 'dixiestyle':10 'down':7 'exotica':2 'jazz':1 'jb':9 'oldies':3 'prerock':8
                                    'search_combo'  'barber':6B,8C,15 'by':2A 'chris':5B,7C 'country':13 'dixieland':14 'dixiestyle':19 'down':1A,16 'exotica':11 'jazz':10 'jb':9C,18 'oldies':12 'prerock':17 'riverside':4A 'the':3A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['instrumental', 'trad jazz', 'blues', 'jazz', 'dixieland']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620528465.3630207  (2021-05-09 04:47:45)
                             'size'  4406046