Linear fade-out

Programming and Development General Audio Programming
1

Dear forum members,

I have a short question regarding the built-in linear fade in/out.
I tried to find the fade code in the archive, but drowned in the numerous threads :slight_smile:
I would be happy to see the code if someone has easy access to it, otherwise, I would like to know if the linear function is applied to the intensity, i.e. it’s the db measure that gets linearly changed.

Many thanks,
Moran

2

The linear function is applied to the sample value, thus to the linear scale level, not “dB” (which would be an exponential fade).

The code is in /src/effects/Fade.cpp

bool EffectFadeIn::ProcessSimpleMono(float *buffer, sampleCount len)
{
   for (sampleCount i = 0; i < len; i++)
      buffer[i] = (float) (buffer[i] * (float) (mSample + i)
                           / (float) (mLen));
   mSample += len;

   return true;
}




bool EffectFadeOut::ProcessSimpleMono(float *buffer, sampleCount len)
{
   for (sampleCount i = 0; i < len; i++)
      buffer[i] = (float) (buffer[i]
                           * (float) (mLen - 1 - (mSample + i))
                           / (float) (mLen));
   mSample += len;

   return true;
}
3

Many thanks for the quick and informative reply!