Potential Paths: Path 1: Combining the tools Otter.ai and ElevenLabs would provide a two-way solution. Otter.ai could be used to transcribe speech into text, and then ElevenLabs could be used to turn this text back into speech with different speech speed and voice type options. However, this method might be complex and time-consuming due to the need for interactions between two separate apps. Path 2: The ElevenLabs tool fits the user's query the closest, since it already has features allowing adjustment of voice type and turning text into speech. Although the speech speed adjusting feature was not explicitly mentioned, this might be part of the voice creation process which is a natural part of voice synthesis.
Based on your request for a text-to-speech tool that can read aloud written content, with adjustments for speech speed and voice type, the ElevenLabs application appears to be the most suitable. This tool utilizes voice AI to help create or clone voices that can speak in up to 30 languages, making learning materials more engaging and adaptable to various learning needs.
With ElevenLabs, you can create synthetic voices from scratch by selecting gender, age, and accent to fit your teaching style or cater to your students' preferences. The generated voices can speak in up to 30 languages while maintaining their unique characteristics, which can be particularly useful in a multilingual teaching environment.
The tool's speech synthesis feature allows you to convert written lessons into spoken words, making your content more accessible to students, especially those who might struggle with reading.
Please note that though the speech speed adjustment feature was not explicitly mentioned in the product description, it may be part of the voice modulation process within ElevenLabs. If this feature crucial, I recommend contacting ElevenLabs directly for clarification.
Finally, please aware that the service has different pricing tiers depending on your needs, ranging from a free plan for short interactive lessons to a Creator plan designed for producing longer educational materials or audiobooks. Before making a purchase, you could try the free plan to see if this tool meets your needs.
Remember, my recommendation is based on the information available and your specific request. Teachers find this tool beneficial due to its lifelike voice quality and utility for language pronunciation, which could potentially be a game-changer in your teaching methodology.