Who’s got talent? Comparing TTS systems for comprehensibility, naturalness, and intelligibility

Abstract

The current study compared five free Text-To-Speech (TTS) systems, selected based on characteristics such as availability and capabilities. Tasks were completed by 37 English learners to evaluate these systems in terms of their comprehensibility, naturalness, and intelligibility. Our findings indicate that IBM Watson and Google Translate are the best TTS systems, according to the evaluation criteria employed.