[PD] control signal sample speed

[padawan12]

Yes, convert your control signals to audio rate with [sig~] (maybe interpolate
them too using [line~]) and then use [vcf~] which has an audio rate Cf 

I'm not sure about a-rate control od Q though.

On Tue, 31 Oct 2006 17:22:47 +0000
"Þurstan Skallagrimsson" <thurstan666 at hotmail.com> wrote:

> In a project I am working on I am using a [bp~] to mimic a helmholtz 
> resonator. The difficult part is that this cilinder I am modeling is 
> constantly changing its volume, thereby changing its resonant frequency and 
> Q.
> 
> This works well at lower speeds but the trouble is that the cycles go up to 
> once every 30 milliseconds. This means that the frequency and Q go up and 
> down again 33 times per second. Long before these frequencies this setup 
> tends to explode and create feedback.
> 
> My thoughts about my problem tend to point at the Nyquist frequency of 
> control signal sample time. Is this true and can I change the sampling speed 
> of control signals? Of course I thought about sending the data in audio 
> signal but [bp~] does not accept that of course.
> 
> Is there another filter out there that I can control with audio signals if I 
> cannot change the control signal sample speed?
> 
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