Altered Studio vs ESPnet
Altered Studio
altered.ai
ESPnet
espnet.github.ioSide by side
| Figure | Altered Studio | ESPnet |
|---|---|---|
| Price from | $30/mo | Free |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | — | Yes |
| Web | Yes | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 6 | 2 |
| Spec score · Text-to-Speech Software | 9.5 (#1) | 8.9 (#17) |
| Spec score · Text-to-speech tools | 9.3 (#6) | 8.8 (#28) |
| API access | The FAQ says API access is offered to Enterprise customers for integrating Studio into other systems. | Yes |
| Integrations | The online Voice Editor can work with audio files in Google Drive, and RealTime Pro routes audio through a virtual microphone to apps including Discord, Zoom, Microsoft Teams, and Google Meet. | The installation guide lists W&B and TensorBoard among the training dependencies. |
| Licence | Terms describe Attribution, Creator, Commercial and Streaming licences rather than an open-source licence. | The repository and website identify the software as Apache License 2.0. |
| Text-to-speech | Text-to-speech offers more than 70 languages and third-party voices from Azure, Google, AWS Polly and IBM. | ESPnet includes text-to-speech recipes and Python modules. |
| Voice cloning | Users can make a Rapid Voice Clone with 4–8 seconds of audio; custom voice models are available by contacting Altered. | No |
| What it does | Altered Studio combines speech-to-speech voice morphing, text-to-speech, cloning, transcription, translation, dubbing and audio editing in one platform. | ESPnet is an end-to-end speech-processing toolkit for recognition, synthesis, translation, enhancement, diarization, spoken-language understanding and related tasks. |
Plans
Altered Studio
- FreeFree
- Creator$30 a month
- Professional$90 a month
- Creator$360 a year
- Professional$1,080 a year
- EnterprisePriced on request
In their own words
Altered Studio
Altered Studio combines voice transformation and audio production tools for creating professional voice content. Its Speech-to-Speech and Performance-to-Performance morphing changes a voice while retaining the speaker’s performance. Other tools include text-to-speech, voice cloning, AI voice cleaning, denoising, audio editing, DSP effects and batch processing. Studio supports transcription and translation in 75+ languages, and text-to-speech voice-over in 70+ languages. A Rapid Voice Clone can be made from 4–8 seconds of audio; custom voice models are available by contacting Altered. The online Voice Editor can work with Google Drive audio, while RealTime Pro routes audio through a virtual microphone to apps including Discord, Zoom, Microsoft Teams and Google Meet. The free plan includes 3 minutes per month of voice morphing and 10,000 AI tokens. Creator costs $30 a month billed annually; Professional costs $90 a month billed annually. Desktop use requires a Windows PC with an 8GB+ Nvidia GPU, and mobile devices are not currently supported.
ESPnet
ESPnet is an open-source toolkit for speech processing, including recognition, text-to-speech, translation, enhancement, speaker diarization, and spoken language understanding. It provides complete recipes for a range of tasks, plus tutorials, notebooks, and demos for existing models. Users can install ESPnet and espnet-model-zoo with pip to run inference on existing models; published models can also run in CPU or GPU inference containers without checking out the repository. Installation supports editable pip setup and optional dependency groups for tasks such as ASR, TTS, and speech enhancement. Training requires a separate extra that includes Lightning, TensorBoard, W&B, torch_optimizer, matplotlib, and Dask. Some task-specific packages must also be installed separately when a recipe needs them. ESPnet 1 is no longer supported, while ESPnet2 users can skip installing Kaldi. The toolkit is released under Apache License 2.0 and permits commercial use. It offers API access and lists Linux, macOS, Windows, and self-hosted platforms; WAV is the listed export format.