# 音频资源及其参数

音频资源包含：音频参数和变速参数

* 可调整音频的音量大小、淡入淡出时长
* 调整音频播放倍速

<div align="left"><img src="/files/x05aaoh2EahTq0MDljqm" alt=""></div>

### 音频参数 <a href="#nbinb" id="nbinb"></a>

* 音量控制：用于调节音频音量大小。-∞ ～ 20db，默认0db。最大可放大20db，最小可缩减为0
* 淡入时长：可设置淡入，则音量大小从开始的0逐渐升至正常音量。由设置的淡入时长确定
* 淡出时长：可设置淡出，则音量大小从正常音量逐渐降至结束时的0。由设置的淡长时长确定

<div align="left"><img src="/files/tXaISZ0munORmkzLKC1e" alt=""></div>

* 设置淡入淡出后的音量波形

<figure><img src="/files/jvXVHfYk2XGiio6AbHRi" alt=""><figcaption></figcaption></figure>

### 变速参数 <a href="#udd6f6383" id="udd6f6383"></a>

* 变速倍数：可调节视频变速倍数，最小0.5x，最大16x。变速倍数越大，视频时长越短
* 变速时长：可通过修改变速时长，以调节变速倍数，最小0.1s
* 声音变调：由于变速会导致音频变调，我们默认采用了智能算法使得变速后的音频音调保持不变。如需变速后的音调也发生变化，请勾选声音变调

<div align="left"><figure><img src="/files/nMLv3I19cVaMzm8tB0Ho" alt="" width="325"><figcaption></figcaption></figure></div>


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