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We propose a highly controllable voice manipulation system that can performany-to-any voice conversion (VC) and prosody modulation simultaneously.State-of-the-art VC systems can transfer sentence-level characteristics such asspeaker, emotion, and speaking style. However, manipulating the frame-levelprosody, such as pitch, energy and speaking rate, still remains challenging.Our proposed model utilizes a frame-level prosody feature to effectivelytransfer such properties. Specifically, pitch and energy trajectories areintegrated in a prosody conditioning module and then fed alongside speaker andcontents embeddings to a diffusion-based decoder generating a converted speechmel-spectrogram. To adjust the speaking rate, our system includes aself-supervised model based post-processing step which allows improvedcontrollability. The proposed model showed comparable speech quality andimproved intelligibility compared to a SOTA approach. It can cover a varyingrange of fundamental frequency (F0), energy and speed modulation whilemaintaining converted speech quality.

Highly Controllable Diffusion-based Any-to-Any Voice Conversion Model with Frame-level Prosody Feature