======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '172'
                                          'artist'  'Benny Goodman'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Sentimental Journey'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['big band', 'jazz', 'clarinet', 'oldies', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '1950'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-soft-swing'
                                             'bpm'  '90.210'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '90.210'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-soft-swing'
'TDRC' (Recording time)                             '1950'
'TIT2' (Title/songname/content description)         'Sentimental Journey'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Benny Goodman'
'TRCK' (Track number/Position in set)               '1'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['big band', 'jazz', 'clarinet', 'oldies', 'swing']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.51 dB'
'TXXX:replaygain_track_peak'                        '0.518673'

========================== row from database ==========================
                                              'id'  793220
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Lee, Peggy/New Folder/Peggy Lee - Sentimental Journey.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  172
                                           'genre'  prerock-jb-jazz-soft-swing
                                        'filesize'  2763648
                                           'mtime'  1620531250
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Lee, Peggy New Folder Peggy Lee prerock jb jazz soft swing
                                      'tag_artist'  Benny Goodman
                                     'tag_release'  None
                                       'tag_title'  Sentimental Journey
                                             'bpm'  90.21
                                    'search_title'  'journey':2 'sentimental':1
                                   'search_artist'  'benny':1 'goodman':2
                                  'search_release'  
                                     'search_rest'  'country':4 'exotica':2 'folder':9 'jazz':1 'jb':11 'lee':5,6 'new':8 'oldies':3 'peggy':7 'prerock':10 'soft':12 'swing':13
                                    'search_combo'  'benny':3B 'country':8 'exotica':6 'folder':13 'goodman':4B 'jazz':5 'jb':15 'journey':2A 'lee':9,10 'new':12 'oldies':7 'peggy':11 'prerock':14 'sentimental':1A 'soft':16 'swing':17
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-3', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['big band', 'jazz', 'clarinet', 'oldies', 'swing']
                                        'tag_date'  1950
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620531250.3794262  (2021-05-09 05:34:10)
                             'size'  2763648