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Default the English model's temperature to 0.3 (#223)

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## Motivation

Human evaluations consistently prefer the English model at temperature
**0.3** over the current default **0.7**, and the change is free on
every objective axis we measured.
This commit is contained in:
Manu Orsini
2026-07-16 14:42:04 +02:00
committed by GitHub
parent 9514983efd
commit d108410d23
7 changed files with 20 additions and 9 deletions
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docs/API Reference/python-api.md
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@@ -37,14 +37,14 @@ The main class for text-to-speech generation.
#### Class Methods
##### `load_model(language=None, config=None, temp=0.7, lsd_decode_steps=1, noise_clamp=None, eos_threshold=-4.0, quantize=False)`
##### `load_model(language=None, config=None, temp=None, lsd_decode_steps=1, noise_clamp=None, eos_threshold=-4.0, quantize=False)`
Load and return a TTSModel instance with pre-trained weights.
**Parameters:**
- `language` (str | None): Name of built-in language config to load. Supported values: `"english_2026-01"`, `"english_2026-04"`, `"english"`, `"french_24l"`, `"german_24l"`, `"portuguese_24l"`, `"italian_24l"`, `"spanish_24l"`. If both `language` and `config` are omitted, defaults to `"english"`, which is the same model as `"english_2026-04"`. The "24l" variants are larger models that are not distilled yet and are here only as a preview.
- `config` (str | None): Path to model config YAML file. Incompatible with `language`.
- `temp` (float): Sampling temperature for generation (default: 0.7)
- `temp` (float | None): Sampling temperature for generation. `None` uses the model's recommended default from its config file (`default_temperature`; 0.3 for the English model, 0.7 otherwise).
- `lsd_decode_steps` (int): Number of generation steps (default: 1)
- `noise_clamp` (float | None): Maximum value for noise sampling (default: None)
- `eos_threshold` (float): Threshold for end-of-sequence detection (default: -4.0)
docs/CLI Commands/generate.md
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@@ -25,7 +25,7 @@ This will generate a WAV file `./tts_output.wav` with the default text and voice
- `--config CONFIG_PATH`: Path to custom config.yaml (for loading local model files). Incompatible with `--language`.
- `--lsd-decode-steps LSD_DECODE_STEPS`: Number of generation steps (default: 1)
- `--temperature TEMPERATURE`: Temperature for generation (default: 0.7)
- `--temperature TEMPERATURE`: Temperature for generation (default: the model's recommended value from its config — 0.3 for the English model, 0.7 otherwise)
- `--noise-clamp NOISE_CLAMP`: Noise clamp value (default: None)
- `--eos-threshold EOS_THRESHOLD`: EOS threshold (default: -4.0)
- `--frames-after-eos FRAMES_AFTER_EOS`: Number of frames to generate after EOS (default: None, auto-calculated based on the text length). Each frame is 80ms.