The Atmosphere AZM4-D is a 4-zone audio processor and the heart of an Atmosphere audio control system. Powerful DSP combined with innovative algorithms offer custom solutions for a wide variety of spaces. Dante networked audio provides convenient audio distribution to other Dante-enabled devices. A built-in message player, virtual wall controllers, learning ambient noise sensing, Tilter Filter, auto-gain, GPIO, bell scheduler, room combine, and many more features, make the AZM4 a processing powerhouse.​

The AZM4-D is compatible with all seven of the Atmosphere wall plate accessories for control, remote audio input, and ambient noise sensing. Up to 16 of these plug-and-play Accessories can be connected across 2 accessory ports on the AZM4-D. Additionally, a zone paging station can be added as an accessory. Each port is designed to work reliably up to 1000ft.​

Programming is simple through a modern on-board web interface, optimized around common use-cases. Built around Progressive Web App technology, the control interface is device agnostic, responsive, and meticulously designed for an ideal user experience without sacrificing design freedom. In addition to Ethernet, built-in Wi-Fi allows for tablets and other controlling devices to connect directly to the AZM4-D.​