> For the complete documentation index, see [llms.txt](https://docs.acestudio.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.acestudio.ai/docs/product-wiki-zh/ai-yue-qi/create-instrument-sounds/expression-controls.md).
# 表情参数
## 什么是表情参数
表情参数是你可以随时间自动化的参数，用于增加细腻变化和真实感，让你像“绘制”一样指定效果应在何处生效。
### 可用控制
颤音
颤音是音符音高的细微而快速的波动，能为声音增添温暖、表现力和丰富度。
分割音色
分割音色是一种高级技巧，通过同时产生多个音高来营造粗粝、富有质感的声音。它非常适合为旋律增加原始、锋利的个性，或带来一种张力感。
## 编辑表情参数
1. 在钢琴卷帘窗下方选择表情参数。
2. 点击并拖动，即可“绘制”要激活的区域。
3. 只需在已激活的区域上右键拖动，即可将其擦除。
---
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