5. The method of claim 1 , wherein the synthesized speech is synthesized using selected voice units from the database, wherein the selected voice units comprise a first voice unit from the first text-to-speech voice, and comprise a second voice unit from the second text-to-speech voice.
5. The method of claim 1 , wherein the synthesized speech is synthesized using selected voice units from the database, wherein the selected voice units comprise a first voice unit from the first text-to-speech voice, and comprise a second voice unit from the second text-to-speech voice. 6. The method of claim 5 , wherein the synthesized speech is synthesized without parameterizing the first text-to-speech voice and without parameterizing the second text-to-speech voice.