There is a precedence for embedding x86 in music hardware. Roger Linn's original LM-1, LinnDrum and Linn 9000 (http://studiorepair.com/gallery/Linn/9000/index.html https://www.elektronauts.com/t/the-seminal-groovebox-linn-90...) were full 8088 PCs with custom cards. Successor MPC60 designed by Roger Linn for Akai was powered by Intel 80186. Final Linn's sampler, the legendary Akai MPC3000 is based on SOC form (NEC V53) of NEC V33, a 80186 compatible with microcode replaced by hardwired logic giving it clock for clock performance of 286 and immunity from Intel Microcode lawsuits.
It's coming to an end due to the proliferation of cheap ARM boards. I think the Korg Kronos is the last holdout using a standard x86 PC mainboard now.
Fascinating, thank you!