Third-Party Attribution

License Acknowledgments

Echophrase incorporates the open-source machine learning models and libraries listed below. We thank their authors and maintainers for making this work possible.

This software includes the following third-party machine learning models and libraries:

Voice Recognition Models

NVIDIA Parakeet-TDT 0.6B v3

• Source: https://huggingface.co/nvidia/parakeet-tdt-0.6b-v3
• ONNX export: https://huggingface.co/istupakov/parakeet-tdt-0.6b-v3-onnx
• License: CC-BY-4.0
• Copyright: NVIDIA Corporation
• Description: 600M parameter multilingual ASR model supporting 25 European languages with automatic detection.

NVIDIA Parakeet Realtime EOU 120M v1 (Parakeet Lite)

• Source: https://huggingface.co/nvidia/parakeet_realtime_eou_120m-v1
• ONNX export: https://huggingface.co/altunenes/parakeet-rs (subdir realtime_eou_120m-v1-onnx)
• License: NVIDIA Open Model License (commercially usable, conditions apply - see linked agreement)
• Copyright: NVIDIA Corporation
• Description: 120M parameter streaming ASR model with end-of-utterance detection. English only.

Distil-Whisper Large-v3

• Source: https://huggingface.co/distil-whisper/distil-large-v3
• License: MIT
• Copyright: Hugging Face
• Description: Distilled Whisper model - 6x faster, 50% smaller, within 1% WER of original.

OpenAI Whisper

• Source: https://huggingface.co/openai/whisper-large-v3
• License: Apache-2.0
• Copyright: OpenAI
• Description: Base Whisper model for speech recognition.

Voice Activity Detection

Silero VAD v5

• Source: https://github.com/snakers4/silero-vad
• License: MIT
• Copyright: Silero Team (snakers4)
• Description: Pre-trained enterprise-grade Voice Activity Detector.

Transform Models

T5-Efficient-Mini Grammar Correction

• Source: https://huggingface.co/visheratin/t5-efficient-mini-grammar-correction
• License: MIT
• Author: visheratin
• Training data: C4_200M (CC-BY 4.0)
• Description: Fine-tuned T5-Efficient-MINI for English grammar correction. Optional ~60 MB download from the Settings - Transform picker.

Key Libraries

ONNX Runtime (ort)

• Source: https://github.com/microsoft/onnxruntime
• License: MIT
• Copyright: Microsoft Corporation

Candle

• Source: https://github.com/huggingface/candle
• License: MIT / Apache-2.0
• Copyright: Hugging Face

parakeet-rs

• Source: https://github.com/istupakov/parakeet-rs
• License: Apache-2.0
• Author: istupakov

Tokenizers

• Source: https://github.com/huggingface/tokenizers
• License: Apache-2.0
• Copyright: Hugging Face

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License Texts

CC-BY-4.0 (Creative Commons Attribution 4.0 International)

You are free to:

• Share - copy and redistribute the material in any medium or format
• Adapt - remix, transform, and build upon the material for any purpose, even commercially

Under the following terms:

• Attribution - You must give appropriate credit, provide a link to the license, and indicate if changes were made.

Full license: https://creativecommons.org/licenses/by/4.0/

MIT License

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files, to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED.

Apache License 2.0

Licensed under the Apache License, Version 2.0. You may obtain a copy at: http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND.