LibriSpeech audio and reference transcripts: Vassil Panayotov, Guoguo Chen, Daniel Povey and Sanjeev Khudanpur. LibriSpeech: an ASR corpus based on public domain audio books (2015). Source: https://www.openslr.org/12/ Distribution: https://huggingface.co/datasets/openslr/librispeech_asr Licence: Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ Original FLAC bytes are unchanged. Noise-added WAV files are modifications made by ToolGlance, using seeded synthetic white noise and uniform peak scaling. No endorsement by the corpus authors is implied. ToolGlance measured data and original chart, 2026-08-28: CC BY 4.0. Cite https://toolglance.com/guides/best-ai-transcribe-audio-free with the date, sample, settings and normalization limits. Preserve upstream attribution for audio/reference text. Model outputs may contain transcription errors and source text; no exclusive ownership of source text or automated outputs is claimed. Model weights and third-party runtime libraries are NOT included in this kit. Their own terms apply when downloaded: https://huggingface.co/Systran/faster-whisper-tiny.en (model card: MIT) https://huggingface.co/Systran/faster-whisper-base.en (model card: MIT) https://github.com/SYSTRAN/faster-whisper/blob/v1.2.1/LICENSE (MIT) Original reproduce.py wrapper: MIT License Copyright (c) 2026 ToolGlance Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), 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, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.