Investigation of effects caused by catastrophic forgetting in continual learning of end-to-end text-to-speech synthesis Google slides: https://docs.google.com/presentation/d/1dj2eudW3MH1gh_M6ML0oPN8wHLGTtkSLJjCuboROfNY/edit?usp=sharing Speech samples: http://sarulab.sakura.ne.jp/ysaito/demo_continual.html