Celebrity dubbing in funny videos usually used digital audio processing technology, also known as audio editing or audio synthesis. These technologies could combine an actor's voice with a digital signal generated by a computer to create a whole new voice. In digital audio processing, software tools can be used to process and mix an actor's voice with a computer generated digital signal. This could be done by feeding the actor's voice into an audio editing software and then using various tools and techniques to adjust the volume, quality, tone, and intonation to create a voice that matched the needs of the video. Some audio editing software also provided tools to add sound effects and background music to enhance the entertainment effect of the video. For example, he could add some laughter, cheers, coughs, and other special sounds to make the video more interesting and funny. Although digital audio processing technology could make a celebrity's dubbing more realistic, the final effect still depended on the use of audio editing software and the actor's dubbing skills.