使用网络音频API没有改变音高更改音频速度 [英] Changing Speed of Audio Using the Web Audio API Without Changing Pitch
问题描述
是否有可能改变音频的速度（在加载的MP3文件的形式），而无需使用网络音频API改变音高
Is it possible to change the tempo of audio (in the form of loaded MP3 files) without changing the pitch using the Web Audio API?
我知道的<一个href=\"https://developer.mozilla.org/en-US/docs/Web/API/AudioBufferSourceNode/playbackRate\">playbackRate财产上AudioBufferSourceNode，但也改变音高。我也知道的<一个href=\"https://developer.mozilla.org/en-US/Apps/Build/Audio_and_video_delivery/WebAudio_playbackRate_explained\">playbackRate财产＆LT;音频＆GT; 和＆lt;视频方式＆gt; 元素，但我需要使用网络音频API
I'm aware of the playbackRate property on the AudioBufferSourceNode, but that also changes pitch. I'm also aware of the playbackRate property for <audio> and <video> elements, but I need to use the Web Audio API.
我很新的网络音频API。有什么我可以做什么？
I'm very new to the Web Audio API. Is there anything I can do?
推荐答案
有一种方法可以做到这一点 - 其所谓的颗粒状合成（链接指向PD理论联系，但理论是普遍的）。粒状合成的想法是，声音是在原来的速度进行采样，但它是在从每一个样本点不同的速度播放，但是与节距不会改变的优点。
There is a way to do this - its called granular synthesis (link points to a pd theory link, but the theory is universal). The idea of granular synthesis is that a sound is sampled at the original speed, but it is played at a different speed from each sample point, however with the advantage that the pitch is not altered.
这些Github的网络音频颗粒合成器链接可以帮助你（第一个是更好的）[ HTTP ：//www.github.com/urtzurd/html-audio/ 网络音频颗粒合成]
[ http://zya.github.io/granular/ </A>在Github上的另一个链接] <一个HREF =http://zya.github.io/granular/相对=nofollow称号=在Github上的另一个链接> 2
These Github Web Audio Granular Synthesiser links may help you (the first one is better) [http://www.github.com/urtzurd/html-audio/ "Web-Audio-Granular-synthesis"] [http://zya.github.io/granular/ "Another link on Github"]2
未能与任何WebAudio成功，还有就是选择;把MP3变成胆略和改变速度的方式，然后使用新的文件！ ;）
Failing any success with WebAudio, there is the alternative; bring the mp3 into Audacity and change the tempo that way, and then use the new file! ;)
相信我，我理解你的痛苦，我只花了几周时间试图做的正是与PD-扩展同样的事情。近来到撕裂我的头发。我的教授向我介绍了粒子合成的概念！
Believe me, I understand your pain, I just spent weeks trying to do exactly the same thing with pd-extended. Came near to tearing my hair out. My professor introduced me to the concept of granular synthesis!
祝你好运！
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