QR codes can be slow, and lines build up fast. Signtone replaces static codes with audio sign tones—a frictionless audio QR technology that lets organizers connect with any place in seconds. Whether you’re hosting a conference, running a retail promo, or radio ad, all you need is a speaker. Broadcast: The organizer plays a Signtone over any standard speaker. Detect: The Signtone mobile app picks up the Signtone in seconds. Connect: Users tap once to check in, claim deals, and join waitlists.