1. A method comprising: receiving a first sequence of feature vectors associated with a source speaker for processing based on operations controlled by a processor; receiving a second sequence of feature vectors associated with a target speaker; generating a third sequence of joint feature vectors, wherein the generation of each joint feature vector is based on: a first vector from the first sequence; a first vector from the second sequence; and a first probability value representing the probability that the first vector from the first sequence and the first vector from the second sequence are time aligned to the same feature in their respective sequences; and applying the third sequence of joint feature vectors as a part of a voice conversion process.