播放不同的声音 [英] PlayBack different voices

问题描述

我正在使用iPhone应用程序，我需要多种声音，例如成人的声音变成孩子的声音.

I am working on iphone app, I required multiple voices , e.g. Adult voice become children voice.

我如何使用AVFoundation播放声音.

How can i implement it, I am using AVFoundation for playing voice.

请提供一些编码.

推荐答案

要实现所需的功能，您需要音高转换功能.您可以使用OpenAL来实现.

To implement what you need, you need pitch shifting capabilities. You can use OpenAL to achieve this.

具体来说，在OpenAL中，您可以设置音高

Specifically, in OpenAL, to set pitch you do

alSourcef(source, AL_PITCH, 1.2f); 

其中source是OpenAL声音源的ID.

where source is the id of the OpenAL sound source.

如果您不熟悉OpenAL，请从此处开始: http://benbritten.com/2008/11/06/openal-sound-on-the-iphone/

If you are new to OpenAL, get started here: http://benbritten.com/2008/11/06/openal-sound-on-the-iphone/

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