Hello. Convolution reverb might not be a best approach. The impulses I have seen (including at Noisevault) are puzzling. One impulse has square wave impulses. Another has exp decaying step impulse. Third has something close to sinc impulse. What is the "correct" impulse type? How the reverberations differ in the above examples if all have sampled the same device? Worse: The big Eventide impulse response archive at Noisevault has a sample with good impulses in left channel but fuzzy impulses in the right channel. -*- I will code Dattorro's plate reverb first, because it is close to Lexicon plates. I have coded it already but controls are missing. I'm sure it can be already found as a plugin written by somebody else (google it) but I will spend time in matching the response with Lexicon plate responses found at Noisevault. One of Creative's reverb (the one described in DAFX 2000) is similar to the plate reverb. I will write that kind of plate reverb as well. Juhana -- http://music.columbia.edu/mailman/listinfo/linux-graphics-dev for developers of open source graphics software