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POHow does kAudioUnitSubType_NBandEQ work? Or equalizing using DSP formulas with Novocaine?
 

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  1. POHow does kAudioUnitSubType_NBandEQ work? Or equalizing using DSP formulas with Novocaine?
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    <p>I'm trying to make a 10-band equalizer and the <code>kAudioUnitSubType_NBandEQ</code> audio unit seems the way to go, but Apple's documentation doesn't cover how to set/configure it.</p> <p>I've already connected the nodes but it errors out when I try to connect the EQNode with the iONode (output): <a href="https://gist.github.com/2295463" rel="nofollow">https://gist.github.com/2295463</a></p> <p>How do I turn the effect into a working 10-band equalizer?</p> <p><strong>Update:</strong> A working DSP formula with <a href="http://alexbw.github.com/novocaine/" rel="nofollow">Novocaine</a> is also a solution, any ideas! Those DSP formulas are quite complicated.</p> <p><strong>Update2:</strong> I prefer a working DSP formula with <a href="http://alexbw.github.com/novocaine/" rel="nofollow">Novocaine</a> since that'd be much cleaner/smaller than programming Audio Nodes.</p> <p><strong>Update3:</strong> "The Multitype EQ unit(of subtype kAudioUnitSubType_NBandEQ) provides an equalizer that can be configured as any one of the types described in “Mutitype EQ Unit Filter Types” (page 68)." Source: <a href="http://developer.apple.com/library/ios/DOCUMENTATION/AudioUnit/Reference/AudioUnit_Framework/AudioUnit_Framework.pdf" rel="nofollow">http://developer.apple.com/library/ios/DOCUMENTATION/AudioUnit/Reference/AudioUnit_Framework/AudioUnit_Framework.pdf</a> But still no example.</p> <p><strong>IMPORTANT Update (17/05):</strong> I recommend everyone to use my DSP class I released on github: <a href="https://github.com/bartolsthoorn/NVDSP" rel="nofollow">https://github.com/bartolsthoorn/NVDSP</a> It'll probably save you quite some work. It will make developing a n-band equalizer or any kind of audio filters a breeze.</p>
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      1. POHow does kAudioUnitSubType_NBandEQ work? Or equalizing using DSP formulas with Novocaine?
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      1. POHow does kAudioUnitSubType_NBandEQ work? Or equalizing using DSP formulas with Novocaine?
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    1. COIt looks like there are ~0 people who have used it on the whole internet. Good luck.
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      1. POHow does kAudioUnitSubType_NBandEQ work? Or equalizing using DSP formulas with Novocaine?
      1. USAdam Shiemke
    2. COThanks, someone has to be the first to ask about it, I know some people have used it, like the people that're writing new CoreAudio books!
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    3. COWhen implementing Audio Nodes I found this Apple doc really helpful: http://developer.apple.com/library/ios/#qa/qa1717/_index.html
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      1. POHow does kAudioUnitSubType_NBandEQ work? Or equalizing using DSP formulas with Novocaine?
      1. USAlastair Stuart
 

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