======================== unified (from filesystem) ========================
                                         'bitrate'  '138.338'
                                        'duration'  '182'
                                          'artist'  'Blind Blake'
                                     'text_people'  ''
                                         'release'  'Old Country Music'
                                           'title'  " That'll Never Happen No More 1927"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', '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-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['country blues', 'guitar', 'ragtime', 'piedmont blues', 'blues', 'delta "
 "blues']")
                                     'discogstags'  "['blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1945'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '144.233'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Old Country Music'
'TBPM' (BPM (beats per minute))                     '144.233'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1945'
'TIT2' (Title/songname/content description)         " That'll Never Happen No More 1927"
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Blind Blake'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'blues'
'TXXX:lastfmtags'                                   ['country blues', 'guitar', 'ragtime', 'piedmont blues', 'blues', 'delta blues']
'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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+2.65 dB'
'TXXX:replaygain_track_peak'                        '0.426317'

========================== row from database ==========================
                                              'id'  1514176
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Old Country Music/Blind Blake - That_ll Never Happen No More 1927.wma.mp3
                                         'working'  None
                                         'bitrate'  138
                                    'duration_sec'  182
                                           'genre'  loc-namerica-country
                                        'filesize'  3163326
                                           'mtime'  1621628015
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country That_ll 1927.wma loc namerica country
                                      'tag_artist'  Blind Blake
                                     'tag_release'  Old Country Music
                                       'tag_title'   That'll Never Happen No More 1927
                                             'bpm'  144.233
                                    'search_title'  '1927':8 'happen':5 'll':2 'more':7 'never':4 'no':6 'that':1 'thatll':3
                                   'search_artist'  'blake':2 'blind':1
                                  'search_release'  'country':2 'music':3 'old':1
                                     'search_rest'  '1927':7 '1927wma':9 'country':4 'exotica':2 'jazz':1 'll':6 'loc':10 'namerica':11 'oldies':3 'that':5 'wma':8
                                    'search_combo'  '1927':8A,20 '1927wma':22 'blake':10B 'blind':9B 'country':12C,17 'exotica':15 'happen':5A 'jazz':14 'll':2A,19 'loc':23 'more':7A 'music':13C 'namerica':24 'never':4A 'no':6A 'old':11C 'oldies':16 'that':1A,18 'thatll':3A 'wma':21
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['country blues', 'guitar', 'ragtime', 'piedmont blues', 'blues', 'delta blues']
                                        'tag_date'  1945
                                     'discogstags'  ['blues']

============================== file details ==============================
                                           'mtime'  1621628014.9553645  (2021-05-21 22:13:34)
                             'size'  3163326