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iPhone音频过滤器

[英]iPhone audio Filter

原文 2010-05-13 02:35:45 7 1 iphone/ objective-c

I am considering an app which takes sound (eventually an audio track) and applies an audio filter to it. 我正在考虑一个需要声音（最终是音轨）并对其应用音频过滤器的应用。

So I can play sounds with AudioServicesPlaySystemSound via AudioToolbox framework just fine. 因此，我可以通过AudioToolbox框架使用AudioServicesPlaySystemSound播放声音。

What I need is a very simple example of how I might take a sound and apply (for instance) midrange boost etc. Actually the kind of alteration is irrelevant -- if I can get my head around how the alteration is done I can figure out the rest. 我需要的是一个非常简单的示例，说明如何获取声音并应用（例如）中音增强等。实际上，这种改变是无关紧要的-如果我能直截了当地了解改变的完成方式，我可以弄清楚其余的部分。 I am just finding both docs and examples of altering audio in code to be very scarce. 我只是发现文档和更改代码中音频的示例非常稀缺。

Thanks for any help! 谢谢你的帮助！

1 个解决方案

Unfortunately, anything beyond basic recording and playing of PCM data requires digging into the more murky depths of Core Audio. 不幸的是，除了基本的录制和播放PCM数据外，任何其他事情都需要深入研究Core Audio更加黑暗的深度。 I would probably start by looking at the Core Audio Overview documentation from Apple. 我可能首先查看Apple的Core Audio Overview文档。 They provide an entire mechanism with Audio Units for writing a signal processor or "effect units" that sit in the audio processing graph. 它们提供了带有音频单元的整体机制，用于编写位于音频处理图中的信号处理器或“效果单元”。