Recent developments in generative language modeling and conversational Text-to-Speech present transformative potential for enhancing Augmentative and Alternative Communication (AAC) devices. Practical application of these technologies requires extensive research and testing. To address this, we introduce ConnecTone, a modular platform designed for rapid integration and testing of language generation and speech technology. ConnecTone implements context-sensitive generative text prediction, using conversational context from Automatic Speech Recognition inputs. The system incorporates a neural TTS that supports interpolation between reading and spontaneous conversational styles, along with adjustable prosodic features. These speech characteristics are predicted using Large Language Models, but can be adjusted by users for individual needs. We anticipate ConnecTone will enable us to rapidly evaluate and implement innovations, thereby contributing to faster benefit delivery to AAC users.