改变声音音高（不实时） [英] change sound pitch (not in realtime)

问题描述

我送花儿给人有这个问题，在我的脑海，但无论我问，我从来没有得到一个答案或将是有益的建议：

i alway had this question in my mind, but wherever i asked, i could never get an answer or a suggestion that would be helpful:

我怎么能推销声音（不实时）？

How can i pitch a sound (not realtime) ?

即时通讯使用AVFoundation框架，发挥出自己的声音，像这样：

Im using AVFoundation framework to play my sounds like so:

AVAudioPlayer *player = [[AVAudioPlayer alloc] initWithContentsOfURL:TempRecFile error:nil];
    player.volume = 1;
    [player play];

如何设定音高或我的声音，而无需使用一些othere框架，如OpenAL的频率。尽管如此，如果你知道在那里我可以学到一些OpenAL的一个地方，你太客气：D

How can i set the pitch or the frequency of my sound without having to use some othere frameworks like OpenAL. Although, if you know a place where i could learn some OpenAl you're very welcome :D

推荐答案

有一些iPhone时变调库中提到的这个StackOverflow的答案：的实时变调在iPhone上，
这脱机工作以及可能的实时性。

There are a few iPhone time-pitch shifting libraries mentioned the this StackOverflow answer: Real-time Pitch Shifting on the iPhone, which work offline as well as potentially in real-time.

下面是关于时间间距技术一个维基百科的文章和的在话题 dspdimention概述。

Here's a wikipedia article on time-pitch technology, and a dspdimention overview on the topic.

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