I'm always interested in the technology that I use and the possiblities for upgrades. The DoubleTalk synathesizer is no different. Apparently the doubletalk synthesizer is produced by RC Systems, Inc. I have several questions and wonder if anybody has some answers. (1) how old is the doubletalk synthesizer which is used in the BookPort? (2) is the company involved in development and upgrades to its current synthesizer? Thanks Jim Nuttall--Michigan