> For the complete documentation index, see [llms.txt](https://frostember-studios.gitbook.io/frostspeech-tts/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://frostember-studios.gitbook.io/frostspeech-tts/getting-started/editor.md).

# Understanding the Generation Settings

Depending on the engine selected, different sliders will appear to fine-tune the output.

#### Universal Settings

* **Speed:** Controls the speaking rate. `1.0` is default. `0.5` is half speed, `2.0` is double speed.
* **Silence Scale:** Adjusts the duration of pauses generated by punctuation (commas, periods). Lower values make the speech feel more rushed or continuous.

#### Piper & VITS Specific

* **Noise Scale:** Controls the variance/randomness in the speaker's tone. Lower values (e.g., `0.333`) make the voice sound more monotonous and stable. Higher values (e.g., `0.667`) add more expressiveness but can sometimes introduce audio artifacts.
* **Noise W (Phoneme Duration):** Controls the variance in how long specific phonemes are held. `0.8` is the standard default.
* **Speaker ID:** Some models contain multiple voices (multi-speaker models). Changing this ID (e.g., `0`, `1`, `2`) switches the voice within the same model file.

#### ElevenLabs Specific

* **Stability:** Higher values make the voice more consistent but less emotional. Lower values allow for dynamic expression but might cause the AI to stutter or break character.
* **Similarity Boost:** Higher values ensure the output closely matches the original voice clone's timbre.
* **Style:** Introduces exaggerated stylistic acting. Can cost extra latency/credits.
* **Use Speaker Boost:** Enhances the similarity to the original voice, slightly increasing generation time.


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