1. A speech synthesizer comprising: means for receiving an input from an external control device; first memory means for permanently storing a first plurality of coded speech data; second memory means coupled to said receiving means for temporarily storing a second plurality of coded speech data, said second plurality of coded speech data being provided by said external control device; speech synthesizer processor means for converting coded speech data into digital speech signals representative of human speech; selector means for selectively activating one of said first and second memory means to apply selected coded speech data to said speed synthesizer processor means from either one of said first and second pluralities of coded speech data in response to a control signal provided by said external control device designating which of said first and second memory means is active; and digital-to-analog converter means operably associated with said speed synthesizer processor means for converting said digital speech signals into analog signals representative of human speech.
2. A speech synthesizer as set forth in claim 1, wherein said first memory means is a read-only-memory.