Lyle Mays

This article mentions that Mays replaced his Prophet 5 with a Roland JX-10.

In this music radar article, it mentions Mays originally used an Oberheim Four Voice while with the Pat Metheny Group.

This music radar article mentions Mays' signature ocarina sound was created on the Prophet 5 rev 2.

As stated on his MusicDatabase biography, Lyle Mays used a Kurzweil K250 digital synthesizer:

Mays plays a Steinway Grand Piano with built-in MIDI. He has used an Oberheim 8 Voice Synth, a Sequential Circuits Prophet 5, Kurzweil K250, Korg DW-8000, Korg Triton keyboards, and many more.

As stated on his MusicDatabase biography, Lyle Mays used a Korg DW-8000 digital synthesizer:

Mays plays a Steinway Grand Piano with built-in MIDI. He has used an Oberheim 8 Voice Synth, a Sequential Circuits Prophet 5, Kurzweil K250, Korg DW-8000, Korg Triton keyboards, and many more.

As stated on his MusicDatabase biography, Lyle Mays used a Steinway Model D Grand Piano:

Mays plays a Steinway Grand Piano with built-in MIDI. He has used an Oberheim 8 Voice Synth, a Sequential Circuits Prophet 5, Kurzweil K250, Korg DW-8000, Korg Triton keyboards, and many more.

He can be seen playing this piano in every live video too. You can see a collection of them on this Synthopia.com biography / portrait: https://www.synthtopia.com/content/2020/02/11/lyle-mays-has-died-at-the-age-of-66/

Starting with Speaking of now tour, Lyle Mays replaced JX10 and Oberheim 4voices with 76-keys Korg Triton. He appeared in some Korg advertising too.

A 1980 interview reveals that Lyle Mays played a Yamaha CP-30 with Pat Metheny Group. It can be heard clearly on 'Airstream'.

A photograph depicts Lyle Mays on stage with a Kurzweil K250 RMX positioned to his left.