Alejandra is a new Americas Spanish voice.Allison has 20 percent more source material.Some voices were enhanced and are now available with higher definition audio (22kHz).All voices have had their audio re-optimized for better audio.The Cepstral 6 Synthesis Engine eliminates pronunciation errors with smarter algorithms for selection and text analysis.Users can personalize the voice with Speech FX filters such as Dizzy Droid, Old Robot, and Spacetime Echo.Cepstral Personal Voices is a collection of natural-sounding text-to-speech (TTS) voices designed for use by individuals who are blind or have low vision that works with emails, documents, or any speech-enabled application.