atan mini processor

 void AtanMiniProcessor::processBlock(juce::AudioBuffer<float>& buffer, int inputChannels, int outputChannels, ProcessParameters& p) {  
   ScopedNoDenormals noDenormals;  
   for (auto i = inputChannels; i < outputChannels; ++i)  
     buffer.clear(i, 0, buffer.getNumSamples());  
   for (int channel = 0; channel < inputChannels; ++channel) {  
     auto* channelData = buffer.getWritePointer(channel);  
     for (int sample = 0; sample < buffer.getNumSamples(); sample++) {  
       float cleanSig = *channelData;  
       *channelData *= p.drive * p.range;  
       *channelData = (((((2.0f / float_Pi) * atan(*channelData)) * p.blend) + (cleanSig * (1.0f - p.blend))) / 2) * p.volume;  
       channelData++;  
     }  
   }  
 }