Guest interviews don’t have to be complicated. Expert guests (like entertainers, political pundits, athletes, and others) don’t always have access to engineers; they need something as simple to use and familiar as a phone call. However, that doesn’t mean a radio program should settle for phone quality audio. Comrex Opal is a Web Audio Gateway designed for studio use making it simple for guest contributors to send broadcast audio back to the studio by simply clicking a link. It provides HD quality audio from consumer-grade equipment, like a cellphone or a computer with a microphone. It’s easy enough to use without a technical background, and most importantly, it sounds great. It allows two-way delivery of audio to and from remote guests, similar to a telephone call-in system, without the use of phone lines. Opal receives audio calls from users on computers and smartphones and delivers high-fidelity, studio- quality audio while maintaining the delay of a typical mobile phone – whilst being extremely simple for remote guest use.