has anyone tried using optocouplers to reduce noise transmission from, say, a microcontroller to a serial-controlled audio IC like a crystal or TI volume control chip? i'm going to use a Atmel AVR chip to control a multi-channel remote control preamp i want to build using most likely the Wolfson WM8816 chip to control volume, which requires serial data to control it. i will keep the digital circuitry shielded in a separate part of the chassis, but want to minimize noise transmitted through the control lines as well. any thoughts?
thanx,
marc
thanx,
marc