The processSample callback was removed, because there is no need for it anymore. But you can simply do something like this:
void processFrame(span<float, 2>& frameData)
{
for(auto& s: frameData)
s = processSample(s);
}
float processSample(float input)
{
// your old code
}
The compiler will be smart enough to inline that function call so there is absolutely no overhead for wrapping the DSP signal into the processSample function.
And yes, there will be more examples, but good thing is, the HISE C++ source code of the existing nodes is also one big example because the API is almost identical
