# ADAT Lightpipe > ADAT Lightpipe (Alesis Digital Audio Tape) is a proprietary optical interface protocol designed for transferring multichannel digital audio between devices. Originally released in 1991 to connect Alesis digital tape recorders, it has since become a ubiquitous industry standard used by virtually all professional audio hardware manufacturers for expanding input and output capacity. - URL: https://optimly.ai/brand/adat-lightpipe - Slug: adat-lightpipe - BAI Score: 85/100 - Archetype: Challenger - Category: Professional Audio Technology - Last Analyzed: May 7, 2026