I understand your arguments. But then, what we are discussing here? Following your logic SoundPlay and CL-Amp is not needed. Why write letters to authors and request open source or fix our problems ? Now I'm learning to write DSP effects. I thought that writing a player will be a good practice. Some audio processing modules are most likely to be re-written as mediakit addons. ex. Equlizer, Stereo Enhancer, Pitch etc. About QT and the question asked above: the new build based on 4.8.3 release for alpha4 will be available next week.