In this photo from 08 or 07, Hayley is seen playing the Korg X3 in a performance.

In the official music video for "Deadnight Warrior" by Children of Bodom, Janne Wirman is observed using the Korg X3 synthesizer at the 1:17 mark. This particular synth was utilized during the recording of their debut album, "Something Wild," before Wirman transitioned to using the Korg X5D.

In this video Caleb states he used a korg x3 to record keys and synth for attack attack

the synthesizer underneath the MicroKorg is an X3 like PDM stated after being asked if it was an M1

Korg X3 featured in the photo of his home studio in SOS article

https://www.soundonsound.com/people/prefab-sprout

"The M1R gets used for its Bottle Bell patch, but I have to say that I'm a bit disappointed by Studio Electronics' MIDIMini analogue synth, as the tuning drifts quite badly. However, I also have their SE1 analogue synth which is great for bass. Surprisingly, the little Peavey Spectrum Bass also has some great bass sounds that I use — patches three and four. My Vintage Keys is only used occasionally, mainly for the Wurlitzer piano, while the Korg X3 is left set to patch 10, a kind of Rhodes sound. The JV1080 also has a lovely electric piano sound on it, but I'm a bit disappointed with the Technics WSA1R as it doesn't have many really usable sounds. I've just bough a Yamaha CS2X for a bit of fun, for sequencing and so on, and the Trinity I still like."

At he beginning of the video you can see schmotz use a Korg X3 as one of his keyboards

Tilo Wolff used the Korg X3 during Lacrimosa's 1997 live performances, as evidenced by a user-uploaded photo.

Sverd uses a Korg X3 workstation, one can be seen and heard in most - if not all Arcturus live footage and recordings.

"A picture of my music studio from 2001. Roland JV1080, Kurzweil K2000, Korg X3, Korg Wavestation, Yamaha Promix01, Sony DTC-790 DAT Recorder and more :) #studio #homestudio"

Anne Nurmi of Lacrimosa used the Korg X3 synthesizer during the band's live performances in the 1990s, as evidenced by a user-uploaded photo.

Andrea De Paoli, a keyboardist known for his work with the band Labyrinth, confirmed in an article on Audiofader that he used the Korg X3 synthesizer both in the studio and on stage starting in 1997. He stated, "I started playing keyboards with Labyrinth in 1997. At the time, both in the studio and on stage, I used a Korg X3 and an 01W for mainly acoustic sounds." This disclosure provides direct evidence of his usage of the Korg X3 during his early years with the band.