6. The method of claim 1 , wherein the speech synthesizer front end incorporates the supplemental phoneset as an extra feature.
6. The method of claim 1 , wherein the speech synthesizer front end incorporates the supplemental phoneset as an extra feature. 7. The method of claim 6 , wherein preselecting of the units further comprises assigning costs to units in one phoneset based on whether a unit of interest agrees in terms of another phoneset.