Eric Persing has had a unique and influential relationship with Roland Corp for two decades. He started as a product demonstrator in 1984, showing some of Roland's first MIDI instruments. He quickly became involved in the R&D side with Roland Japan, earning the title "Chief Sound Designer", and began contributing his design ideas, real-world studio experience and sound design expertise. Persing's skills have left their mark on countless classic Roland instruments.

He is the originator of many legendary Roland sounds that have become part of the vocabulary and lexicon of musical sound. These include the Factory D-50 sounds such as Fantasia, Soundtrack and Digital Native Dance, a majority of the JV/XP/XV series Classics, all the Factory JD-800 sounds, the original Juno "Hoover" sound and thousands of others.

Here is a partial list of the Roland instruments that Eric has contributed his sound design, sampling and design consulting skills:

Juno-106 Alpha Juno 1&2 JX-3P JX-8P JX-10 Jupiter 6 Super Jupiter D-50 D-550 D-110 D-10 D-20 D-70 MT-32 U-110 U-20 U-220 Sound Canvas JD-800 JD-990 JV-80 JV-90 JV-1000 JV-1080 JV-2080 XP-10 XP-50 XP-60 XP-80 XV-3080 XV-5050 XV-5080 Fantom JP-8000 JP-8080 S-10 S-220 S-50 S-550 S-770 S-760 S-750 MC-303 MC-500 MC-505 VP-9000 MSQ-700 MSQ-100 MKS-20 MKS-30 MKS-50 MKS-70 MKS-80 R-8 R-5 DR-660 DR-770 R-70 V-Drums V-Drums expansion board SRV-2000 DEP-5 RSP-550 R-880 SRV-330 SE-50 SE-70 VS-880 VS-1680 SR-JV series expansion boards SRX series expansion boards Sound Canvas Project series CD-ROM libraries Archives series CD-ROM libraries Composers series CD-ROM libraries

Email from Tommy Tallarico from a fan who replied to him.

"Hi Dell!, I use the S-550 for sampling, and The Roland JD-800 for my main synth (which I also used as a controller for GEMS) and a little later the JP-8000. I would also add in some Roland Juno 1 stuff as well. The other thing I used was a Kawai K3 Keyboard, K4 Rack mount and Kawai Q-80"

In a Facebook video posted by Jim Noir, a Roland Alpha Juno-1 can be briefly seen among his equipment.

Spotted using a Rolan Alpha Juno 1 on his instagram account.

In this interview with Guitar World, Emerson talks about the instruments that were used on the 'Emerson Snowe's Splatterpunk' EP.

In a photograph, Eric Ragno is shown with a Roland Alpha Juno-1 positioned directly behind him, confirming his use of this synthesizer.

Used live at the Natural History Museum of Los Angeles County, as can be seen in this May 5, 2017 Instagram post.