British speech: Piper en_GB-alba-medium (22,050 Hz).
Voice model: https://huggingface.co/rhasspy/piper-voices/tree/217ddc79818708b078d0d14a8fae9608b9d77141/en/en_GB/alba/medium
Model card: https://huggingface.co/rhasspy/piper-voices/blob/main/en/en_GB/alba/medium/MODEL_CARD
Training dataset: University of Edinburgh, https://datashare.ed.ac.uk/handle/10283/3270
Dataset license: Creative Commons Attribution 4.0, https://creativecommons.org/licenses/by/4.0/
Voice model provided by the Piper / Rhasspy project; model unchanged.
Generated audio uses normal speaking speed (length_scale=1.0).
Piper runtime 1.4.2 (GPL-3.0): https://github.com/OHF-Voice/piper1-gpl
Speech is synthesized on the server; no phone system voice engine is required.
Mobile copies are encoded as 64 kbps MP3; original WAV clips are retained.