Merge pull request #106 from descriptinc/ag/real

Fix to use `real` instead of `real()`

Author: anjoola

tests/core/test_grad.py

@@ -28,7 +28,7 @@ def _test_audio_grad(attr: str, target=True, kwargs: dict = {}):
                 if result.stft_data is not None:
                     result.istft()
                 if result.audio_data.dtype.is_complex:
-                    result.audio_data.real().sum().backward()
+                    result.audio_data.real.sum().backward()
                 else:
                     result.audio_data.sum().backward()
             else: