To dub videos

My roomates were all out, the room was quiet like midnight. I thought it was a good time for me, because I could would be able to dub some videos in Chinese.
After one hour, I had completed my work. In the video I dubbed for * an innocent girl who was kind-hearted. So my voice needed to be pure and clean, and I did it smoothly. Actually, I had dubbed for a sexy role five days ago. Because the role was coquettish, so my voice was coquettish too.
Those were two completely different voices, my roomates thought it difficult to make do. But for me, as I can control my voice, I didn't think it is a big problem, haha.

* I don't know anything about dubbing but I would use the verb that you dub another actor/ a voice/ a role/ a part... playing the character of an innocent girl.  

eg. I dubbed the voice of a character of an innocent girl.