  In this paper, we study the controllability of an Expressive TTS system
trained on a dataset for a continuous control. The dataset is the Blizzard 2013
dataset based on audiobooks read by a female speaker containing a great
variability in styles and expressiveness. Controllability is evaluated with
both an objective and a subjective experiment. The objective assessment is
based on a measure of correlation between acoustic features and the dimensions
of the latent space representing expressiveness. The subjective assessment is
based on a perceptual experiment in which users are shown an interface for
Controllable Expressive TTS and asked to retrieve a synthetic utterance whose
expressiveness subjectively corresponds to that a reference utterance.
