ElevenLabs is a startup and technology company that specializes in natural-sounding speech synthesis and text-to-speech software using artificial intelligence (AI) and deep learning. The company's flagship product is a browser-based text-to-speech software that can replicate natural-sounding speech by synthesizing vocal emotion and intonation.
At the core of ElevenLabs' text-to-speech software is a deep learning neural network that is trained on large datasets of human speech to learn the nuances of speech patterns, intonations, and emotions. The neural network model uses a sequence-to-sequence architecture with attention mechanisms to generate speech from input text. The input text is first converted into a sequence of vectors using an encoder, which is then fed into a decoder to generate the corresponding speech waveform.
The neural network model is trained using a combination of supervised and unsupervised learning techniques. In supervised learning, the model is trained on labeled datasets of text and speech pairs, where the text serves as input and the corresponding speech waveform serves as output. The model is optimized to minimize the difference between the predicted speech waveform and the ground truth speech waveform. In unsupervised learning, the model is trained on unlabelled datasets of speech to learn the statistical patterns of speech signals.
To generate natural-sounding speech, ElevenLabs' text-to-speech software incorporates several advanced techniques such as prosody modeling, voice conversion, and style transfer. Prosody modeling refers to the study of the rhythm, stress, and intonation of speech, which is crucial for generating natural-sounding speech. Voice conversion and style transfer techniques allow users to customize the vocal style of the synthesized speech by uploading custom voice samples.
ElevenLabs' text-to-speech software has been criticized for its potential misuse in generating controversial statements in the vocal style of celebrities and public officials. The company has responded to the criticism by stating that it is working on safeguards and identity verification measures to prevent potential abuse. Despite the controversy, the company's innovative technology holds great potential for applications in voice-enabled devices, virtual assistants, and accessibility tools for people with speech impairments.