======================== unified (from filesystem) ========================
                                         'bitrate'  '123.817'
                                        'duration'  '172'
                                          'artist'  'WILF CARTER(aka Montana Slim)'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'SWEETHEART OF MY CHILDHOOD DAYS'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1945'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '92.857'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '92.857'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1945'
'TIT2' (Title/songname/content description)         'SWEETHEART OF MY CHILDHOOD DAYS'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'WILF CARTER(aka Montana Slim)'
'TSSE' (Software/Hardware and settings used for encoding)  'Lavf56.40.101'
'TXXX:DeviceConformanceTemplate'                    'L1'
'TXXX:IsVBR'                                        '1'
'TXXX:Length'                                       '172693'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.41 dB'
'TXXX:replaygain_track_peak'                        '0.422696'

========================== row from database ==========================
                                              'id'  967445
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Old Country Music/Wilf Carter (Montana Slim) - Sweetheart Of My Childhood Days.wma.mp3
                                         'working'  None
                                         'bitrate'  123
                                    'duration_sec'  172
                                           'genre'  loc-namerica-country
                                        'filesize'  2679349
                                           'mtime'  1621628337
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Old Country Music Wilf Carter (Montana Sweetheart Of My Childhood Days.wma loc namerica country
                                      'tag_artist'  WILF CARTER(aka Montana Slim)
                                     'tag_release'  None
                                       'tag_title'  SWEETHEART OF MY CHILDHOOD DAYS
                                             'bpm'  92.857
                                    'search_title'  'childhood':4 'days':5 'my':3 'of':2 'sweetheart':1
                                   'search_artist'  'aka':3 'carter':2 'carteraka':4 'montana':5 'slim':6,7 'wilf':1
                                  'search_release'  
                                     'search_rest'  'carter':8 'childhood':14 'country':4 'days':15 'dayswma':17 'exotica':2 'jazz':1 'loc':18 'montana':9,10 'music':6 'my':13 'namerica':19 'of':12 'old':5 'oldies':3 'sweetheart':11 'wilf':7 'wma':16
                                    'search_combo'  'aka':8B 'carter':7B,20 'carteraka':9B 'childhood':4A,26 'country':16 'days':5A,27 'dayswma':29 'exotica':14 'jazz':13 'loc':30 'montana':10B,21,22 'music':18 'my':3A,25 'namerica':31 'of':2A,24 'old':17 'oldies':15 'slim':11B,12B 'sweetheart':1A,23 'wilf':6B,19 'wma':28
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1945
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621628336.6654518  (2021-05-21 22:18:56)
                             'size'  2679349