Re: Clicking filter
Re: Clicking filter
- Subject: Re: Clicking filter
- From: tahome izwah <email@hidden>
- Date: Fri, 11 Nov 2011 08:00:31 +0100
What you need to do is limit the rate of change, ie apply a smoothing
(=lowpass) filter on the *parameter changes* (NOT on your audio
signal). It's hard to be more specific without knowing what you're
doing in your app.
--th
2011/11/10 Pascal <email@hidden>:
> Hi,
>
> I had no luck finding some help from the internet or the CoreAudio List
> Archives for writing an anti-clicking filter. I have sequenced sounds (on
> an iOS application) with parameters (length, pitch, etc) that can very be
> modified. When changed abruptly, clicks are heard. I have tried to apply a
> LP or HP filter on the changed portion of the modified sound, I have tried
> to detect abrupt variations of data value on the rendering callback in order
> to smooth them. But no luck so far.
>
> I am writing to you to see if anyone has some hints or advice to give me.
>
> Many thanks in advance.
>
> Pascal
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