======================== unified (from filesystem) ========================
                                         'bitrate'  '137.698'
                                        'duration'  '166'
                                          'artist'  'Wilfred Arthur Charles Carter'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "You're The Only Star In My Blue Heaven"
                                           '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'  '105.040'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '105.040'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1945'
'TIT2' (Title/songname/content description)         "You're The Only Star In My Blue Heaven"
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Wilfred Arthur Charles Carter'
'TSSE' (Software/Hardware and settings used for encoding)  'Lavf56.40.101'
'TXXX:DeviceConformanceTemplate'                    'L1'
'TXXX:IsVBR'                                        '1'
'TXXX:Length'                                       '166800'
'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'                        '+2.49 dB'
'TXXX:replaygain_track_peak'                        '0.583098'

========================== row from database ==========================
                                              'id'  1502880
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Old Country Music/Wilf Carter (Montana Slim) - You_re The Only Star In My Blue Heaven.wma.mp3
                                         'working'  None
                                         'bitrate'  137
                                    'duration_sec'  166
                                           'genre'  loc-namerica-country
                                        'filesize'  2875392
                                           'mtime'  1621628353
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Old Country Music (Montana Slim) You_re Heaven.wma loc namerica country
                                      'tag_artist'  Wilfred Arthur Charles Carter
                                     'tag_release'  None
                                       'tag_title'  You're The Only Star In My Blue Heaven
                                             'bpm'  105.04
                                    'search_title'  'blue':9 'heaven':10 'in':7 'my':8 'only':5 're':2 'star':6 'the':4 'you':1 'youre':3
                                   'search_artist'  'arthur':2 'carter':4 'charles':3 'wilfred':1
                                  'search_release'  
                                     'search_rest'  'country':4 'exotica':2 'heaven':13 'heavenwma':15 'jazz':1 'loc':16 'montana':7,8 'music':6 'namerica':17 'old':5 'oldies':3 're':12 'slim':9,10 'wma':14 'you':11
                                    'search_combo'  'arthur':12B 'blue':9A 'carter':14B 'charles':13B 'country':18 'exotica':16 'heaven':10A,27 'heavenwma':29 'in':7A 'jazz':15 'loc':30 'montana':21,22 'music':20 'my':8A 'namerica':31 'old':19 'oldies':17 'only':5A 're':2A,26 'slim':23,24 'star':6A 'the':4A 'wilfred':11B 'wma':28 'you':1A,25 'youre':3A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9A
                                           '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'  1621628353.0638666  (2021-05-21 22:19:13)
                             'size'  2875392