hi Kas, > stuck, but here there is actually some clue on what is happening. Right > after I set it to 1.5 the signal explodes and goes to infinity. this value is used like this in fluxus-audio: m_FFTOutput[n]=((m_FFTOutput[n]*m_SmoothingBias)+Value*(1-m_SmoothingBias)); so, i believe it should be >= 0 and < 1. we can limit it in the setter function. best, gabor