======================== unified (from filesystem) ========================
                                         'bitrate'  '134.768'
                                        'duration'  '155'
                                          'artist'  'Wilf Carter'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'My Only Memories Of You (1938)'
                                           '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']")
                                      'lastfmtags'  "['country', 'cowboy', 'folk', 'yodel', 'canadian']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1945'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '118.706'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '118.706'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1945'
'TIT2' (Title/songname/content description)         'My Only Memories Of You (1938)'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Wilf Carter'
'TSSE' (Software/Hardware and settings used for encoding)  'Lavf56.40.101'
'TXXX:DeviceConformanceTemplate'                    'L1'
'TXXX:IsVBR'                                        '1'
'TXXX:Length'                                       '154926'
'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:lastfmtags'                                   ['country', 'cowboy', 'folk', 'yodel', 'canadian']
'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'                        '+1.96 dB'
'TXXX:replaygain_track_peak'                        '0.501273'

========================== row from database ==========================
                                              'id'  967214
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Old Country Music/Wilf Carter (Montana Slim) - My Only Memories of You (1939).wma.mp3
                                         'working'  None
                                         'bitrate'  134
                                    'duration_sec'  155
                                           'genre'  loc-namerica-country
                                        'filesize'  2615296
                                           'mtime'  1621628326
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Old Country Music (Montana Slim) of (1939).wma loc namerica country
                                      'tag_artist'  Wilf Carter
                                     'tag_release'  None
                                       'tag_title'  My Only Memories Of You (1938)
                                             'bpm'  118.706
                                    'search_title'  '1938':6,7 'memories':3 'my':1 'of':4 'only':2 'you':5
                                   'search_artist'  'carter':2 'wilf':1
                                  'search_release'  
                                     'search_rest'  '1939':12 '1939wma':14 'country':4 'exotica':2 'jazz':1 'loc':15 'montana':7,8 'music':6 'namerica':16 'of':11 'old':5 'oldies':3 'slim':9,10 'wma':13
                                    'search_combo'  '1938':6A,7A '1939':21 '1939wma':23 'carter':9B 'country':13 'exotica':11 'jazz':10 'loc':24 'memories':3A 'montana':16,17 'music':15 'my':1A 'namerica':25 'of':4A,20 'old':14 'oldies':12 'only':2A 'slim':18,19 'wilf':8B 'wma':22 'you':5A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           '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'  ['country', 'cowboy', 'folk', 'yodel', 'canadian']
                                        'tag_date'  1945
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621628325.7323713  (2021-05-21 22:18:45)
                             'size'  2615296