> 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/yue-qi/create-instrument-sounds/expression-controls.md).
# 表情参数
了解 ACE Studio AI 乐器表情参数。
## 什么是表情参数
表情参数是你可以随时间自动化的参数，用来增加细节和真实感，让你能“绘制”效果应生效的位置。
### 可用控制项
颤音
颤音是一种细微而快速的音高波动，可为声音增添温暖感、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、富有纹理的声音。它非常适合为旋律增添原始、锋利的特质，或带来张力感。
## 编辑表情参数
1. 选择钢琴卷帘窗下方的表情参数。
2. 单击并拖拽以“绘制”要激活的区域。
3. 只需在已激活区域上右键拖拽即可擦除。
---
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