A Momentary Lapse of Reason was Pink Floyd's first digital album.

That 1987 album was the band’s first to use digital multitrack recording. They recorded it on Sony PCM-1600 digital processors, which was a big deal at the time. The earlier albums were all analog tape.

Worth noting: the album’s sound is very much of its era – clean, a bit sterile, digital reverb everywhere. That’s partly why some fans prefer the warmth of The Wall or Dark Side. But if you’re asking about the technical first, it’s A Momentary Lapse of Reason.

David Gilmour’s later solo work and The Division Bell also used digital, but this was the first.