Hi I have added a few audio samples of the 2SC1583 based Steiner VCF at my site : http://www-timc.imag.fr/Yves.Usson/personnel/SDIY/Modular/EN/STEINERVCF/ ------------------------------------------------------------- Yves Usson http://www-timc.imag.fr/Yves.Usson/personnel/SDIY http://www-timc.imag.fr/Yves.Usson/personnel/SDIY/Modular