Modulating Filters - problem...

d.healey

@Lindon
Do you have a minimal snippet, preferably with just a single synth and the necessary fx and scripts to demonstrate the issue? The snippet you shared is asking for a serials.js file and seems quite complicated for an outsider to try to figure out the issue.

Lindon

@d-healey I will go build one.

Lindon

@d-healey here, its even worse in this instance...

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d.healey

I think it's related to this issue I had - https://forum.hise.audio/topic/1149/how-to-add-lag-to-a-knob

Christoph Hart

Yeah, just don't use the Moog filter it's crap.

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Lindon

@d-healey - hmm lag - maybe if there was some sensible way to add that in, but (and I dont want to be some sort of dram queen here) its pretty fundamental that instruments can have filters that are modulated.

@Christoph-Hart - any idea how to get filters to work here?

Lindon

@Christoph-Hart - as are all the other low pass filters - as they all do the same thing to some extent.

Christoph Hart

Check my snippet there are no artefacts there.

If you're using an envelope make sure that the attack times are not too fast or it will click.

Lindon

@Christoph-Hart - yeah exactly - I need to use an envelope - I did check your snippet - nice - but not what I need. Still as you say its better - but still not right. I will replace all the moog filters with the ladder - but I'm still getting artifacts out of it and the other low pass filters with my audio.

Christoph Hart

Also no artefacts:

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Lindon

@Christoph-Hart said in Modulating Filters - problem...:

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But give it some audio material like a sine wave and back they come.

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Replace the audio with a sine wave and back they come...

Lindon

even with some small attack time (not zero)

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In fact adding in some attack seems to make it worse..

Christoph Hart

Well, if you're using the sine wave generator with the unisono feature, you'll start with a click because of the random phase offset which might get amplified if you run a fast envelope with a high Q filter over it, but this is the only artifact I hear...

Lindon

@Christoph-Hart yeah I can see that - however when I run a sampler through it with "complex" audio there are still artifacts... but let me do a bit more testing and see if I can track it down

Lindon

@Lindon OK well its a LOT better using the Ladder filter - the Moog is, as has been mentioned, really not worth the time. "Complex" audio can at times expose the limitations in the filters(more than one of them) but I can live with it.

It just leaves me wondering about the filters in Kontakt - which exhibit none of these problems. My knowledge of filter design is limited to say the least - but my mental model says its all about working out the coefficients and applying them - so I cant see why NI's filters seem much more "friendly" - but as I say I'm no filter designer...

Modulating Filters - problem...

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