In MusicRadar's interview with Depeche Mode's techs on the Delta Machines tour it was revealed that:

"Sample wise we're using Native Instruments Kontakt and Massive a lot too. We're also using a lot of GMedia ImpOSCar and Synthogy Ivory for pianos too. There are some sounds you can't get with the synths, so we use the samples for those, but there's a lot we can do and we try to use the synths as much as possible. Stripped is a good example of that. The big lead sound is Massive and ImpOSCar all layered up to create that main riff sound."

Martin is strictly using software when he puts his guitars down for older material, he has a Roland Edirol controller as well as an Access Virus both commanding Muse Receptors with various plugins loaded.

This piano-focused virtual instrument can be found in Sky Harbor Studios' collection.

This article on the recording of the "Barking" album describes the band's then-current studio setup. It states, "Underworld relied on both software and hardware synthesizers. Soft-horses included Logic ES2; GForce ImpOSCar, ImpOSCar2, String Machine, and Oddity; Sonic Charge’s Synplant; Synthogy Ivory (piano); Rob Papen BLUE; and Native Instruments’ Battery 3, FM8, Reaktor 5, and Massive."

Imogen Heap was quoted on the Synthogy Ivory page, "Love my Ivory. My perspex piano loves it too. It's what I play live and have recorded quite a few of Ellipse's piano parts with it too. 'tis a wonderful thing"

"The piano comes from the Ivory, very nice, and sounds really good. Eats up lots of memory, but it's worth... doing that." (12:57)

Thomas opens an instance of Ivory at 13:01.

During the Delta Machines tour, DM's keyboard tech Paul Eastman informed MusicRadar... "Sample wise we're using Native Instruments Kontakt and Massive a lot too. We're also using a lot of GMedia ImpOSCar and Synthogy Ivory for pianos too. There are some sounds you can't get with the synths, so we use the samples for those, but there's a lot we can do and we try to use the synths as much as possible. Stripped is a good example of that. The big lead sound is Massive and ImpOSCar all layered up to create that main riff sound."

Michael Riesman says "Finally, the last pre-Bidule rig, initially set up in 2004, ended up consisting of a TX-816 rack, 2 TX-802s, 2 Matrix 6Rs, 5 Matrix 1000s, and a PC hosting Synthogy Ivory for piano sounds, all fed into a Pro Tools 5 system running on a Mac G4 4-slot computer housing 2 Pro Tools cards, 2 Samplecell II cards, and an instance of Soft Samplecell."

https://www.plogue.com/michael-riesman.html

"I use Synthogy Ivory for piano which is an amazing sample collection. I only ever use the Steinway though."

In the details on his 2013 album on his official music page, Billy Currie says he used the Ivory German D preset on a song.

In this interview, he says that he used Ivory in 2009.

In this interview with Marty Gelhaar, Bittan's gear features a MIDI'ed Yamaha C3 grand connected to Synthogy Ivory.

"My whole life I awaited in disbeliefe that there would ever be a great piani sample library. Finally, Ivory came about, and I have used the Steinway sample on at least 100 recordings, and no one has ever questioned that it wasn´t my real piano"