In-Reply-To: <memo.712859 at cix.compulink.co.uk> > I used a 1K resistor in line with the input and a cap, > then a 5V1 zener across this, then to the reset pin. (IIRC) Done this now and it sound great, more like what I call synch, that great oscillator tearing sound. thanks Keith http://home.freeuk.net/lowpass