Geddy used a QX1 on Power Windows tour and a pair of them on Hold Your Fire tour.

In the September 1987 issue of Keyboard Magazine, the bottom right column on page 30 mentioned that Danny Elfman used a Yamaha QX-1 for sequencing at live shows. The article was authored by Bob Doerschuk and Jeff Burger.

[This tweet] from Morris mentions that he bought a QX-1 shortly after New Order recorded Low Life.

In this transcription of a Sound on Sound article, former New Order tech Michael Johnson states that during the making of the Brotherhood album, the band utilized "a Yamaha QX1 Sequencer with dedicated software [and a] Yamaha RX11 drum machine." In this live performance from 1985, we can see both mounted atop Gillian's keyboard rack at the 5:36 mark.

"It's the very first track I've had the production credit on actually. A lot of the hard work was removed though, in terms of production, because I'd done some work preparing the arrangements before we went into the studio. At home I've got some new 'toys' that are well useful for that, like the Yamaha QX1. It's a digital sequencer... This is a technical magazine isn't it? You know, I could never talk to Smash Hits like this!"

In this video tour of Harold Faltermeyer's home, he shows his Yamaha QX1 sequencer at the 3:47 mark.

"The QX1 has been very useful because we can connect up a DX7, take turns putting down ideas, then take the results into the studio, listen to what we've got and change the structure around. On the last few songs, for instance, we've spent a day on each one working out the structure, what key is best for Jon to sing in, and refining the bits that weren't played very well before we put it onto tape."

"Up until recently we used the Yamaha QX1 sequencer with great success but that wasn't a popular machine - people didn't realise how brilliant it was. It was a really excellent machine. The only problem was it wouldn't record an external sync signal, but there are ways around that as well. Our problem was we were always running out of tracks because the QX1 only has eight. We were finding we were doing more and more things before we actually put them on tape. So then we changed over to the Steinberg Pro-24."

These are the list of synthesizers and certain pieces of equipment that the Radiophonic Workshop had in 1985.

In this frame from Mr Mister video, from 1985 Live at Ritz, Steve George has Yamaha QX1.

The instrument appears on the list of instruments on official artist's website (http://olszak.pl/).

Kristian Schultze is associated with the Yamaha QX-1 audio sequencer, as noted in the booklet of the source image on Discogs.