Smoother for Snex Parameters

[orange]

Turning knobs is causing some zipper noise, depending on the dsp code in the Snex.

How can we add a smoother to a parameter inside Snex?

[Dan Korneff]

@orange There is one already. You can even adjust the smoothing time :)

[Christoph Hart]

@dustbro you might need to add a fix32 block around it or you still might hear the zipper noises from the once-per-buffer update of the smoother.

[Dan Korneff]

@Christoph-Hart In my experiments, I actually have to wrap all of my dsp in a sample accurate container. It not only removed unwanted artifacts, but made offline bounces work properly.

[Christoph Hart]

@dustbro Yeah, that shouldn't be necessary.

BTW, there's a inbuilt smoothed float type in SNEX, which might be better (from a design perspective it's more elegant to smooth the parameters that you need directly in the algorithm / node so that you don't have to add this construct around it anytime you try to change its parameters:

template <int NV> struct simple_ramp_test
{
	SNEX_NODE(simple_ramp_test);
	
	sfloat value = 1.0f;
	
	
	// Initialise the processing specs here
	void prepare(PrepareSpecs ps)
	{
		

		// uses the sample rate from the processing specs
		  // to create a 100ms ramp.
		  value.prepare(ps.sampleRate, 100.0);
	}
	
	// Reset the processing pipeline here
	void reset()
	{
		// reset the ramp when this is called
		value.reset();
	}
	
	// Process the signal here
	template <typename ProcessDataType> void process(ProcessDataType& data)
	{
		for(auto& s: data[0])
		{
			s *= value.advance();
		}
	}
	
	// Process the signal as frame here
	template <int C> void processFrame(span<float, C>& data)
	{
	}
	
	// Process the MIDI events here
	void handleHiseEvent(HiseEvent& e)
	{
		
	}
	
	// Use this function to setup the external data
	void setExternalData(const ExternalData& d, int index)
	{
		
	}
	
	// Set the parameters here
	template <int P> void setParameter(double v)
	{
		// set the ramp target in the parameter callback
		value.set((float)v);
	}
};

Example use:

HiseSnippet 1082.3ocwW0saaaCElxILa1ocnsXO.9xTfr.6tttArKZichGL1RpPUVPuyfghNlvTjBTTI1aX2uGq8H02fsyQTNRJwHnwHayWj3ye77wyuzgVCWjkYrjf1msLUPBdBMZo1Ma3LlTSFeDI3qnmvxbBaWOqAKSYYYhXRPvV+DxHn81jhOe5sCXJllKpXQHmajbwuHSjtJtgu6mkJ0HVr3LYRMse86FyM5gFkIGvyVzdjTFeN6RwoLTsVTRvNGGKcFaji4DYfNCLwKilYtV60+bYl7Bk.I5ShfCxylLblTEGt5tlQHAaGVcy2xey+Z5IxX4M7qh.OqPP2JKpGCBZcePp+C.RA0fz1dH8bZD2JScURP7rKcrFRHSYPntNT75RB9K5PCnf1cPBatXjEHtwf8dSud62E9yK+wo4ZtSZzcM5SMNw6068xN+dm1c9iNcusnoSWqLzMViRIrqULlcs2mg6oyStPX2u6ULUt3FEgqeyX5NedwTt+VWSQidrV5depnjdjQEiwJ762MCPJCav290wGwbLLoTxCzKUXcRDNAGItBpp8on1ziDYyclTnt9N4OnxwDmqXtlkSXeSo.HdzHGhIJclzsrde0CnFq28Vi84BwmSCkN9r0iwVqAiPj5eCLV1Y9T5wSmJ3tJ.tMczG2z1vdO31vNksgfOQm+jRxti9X+01.9mzph8TqHkYEmYBUrk6kwRRUhO.Xb+tWnL74QxeSb2NjTODFfZrGeFSqEprMoQZmGogSjOXxcR8kmvbV4BR.8z7jHXLMWLrDc.ufVXOjmtGRi0EQBcbAweCeJE1GoCJE1ekvZsemJbWaryKRGkeGRF9XeVQPdxzE8IGpTlqGZRRkkUoPNnfWnQsLclQK4HKuFqP5gIlbvIkvMn0olXH.PGw3PfZYHyMCq+wYIPwlvd.+lhtF9tddGOhUqs72ZvkI3UoXo0V0Fd3quPJn6ok+TGmcNJkyTjyw7G1iQvyrXQUI9PUoTVbLoAR6PSf+e.x+AfnV0QDIjYgErvBBO7VQAUOmH0kHppQ+D1haw6SuMxIRwJ455EMWbsGp00DuFeA0e.24XH0tq6RyzhESzHmF23mA4Fq3fJoOZYh1zgJ3jFGuBYuflIw90IPDIcBzA4JNOfyhx0CzyXP+CFDiTxXgMDdvBRcXdrzLR5EA+2GbIGIyRgw.CxgwY1+OB86Rq7w8F9eJMwnMuBe3mvzLA7BeBnt7GkRu5teGZpfMuoe2062BAO.GtcCGVsR6Ll8Rgyu1udJM31IoawAKVzwhEqFacLL4MFdUQg4qFk03d0fXfwLOgULaaydkw+EShSXbqYB2ubACAeYAGnARW7T71vuI.n61mbkuHhR6cPORB7L4IbNtd9afGXsdad0FXy2tA175MvluaCr4MafMe+FXyObu1f+BkCyclD+hPfQ3w9Jxfi03LphVEx+DNNOO.

(you might have to manually create a SNEX node file called simple_ramp_test and paste the code above

[Dan Korneff]

@Christoph-Hart I'll try to make a test example to see if I can pinpoint the issue. I was getting Buffer crashes without the frame container.

[orange]

@Christoph-Hart & @dustbro Thank you for the tip guys.

@dustbro said in Smoother for Snex Parameters:

I'll try to make a test example to see if I can pinpoint the issue. I was getting Buffer crashes without the frame container.

Does the node requires fast calculations? I think Frame nodes are especially for fast operations (like detailed, more accurate signal analyzing...etc.) and maybe there is some overload.