The article fails to mention this somehow, so I'd like to mention that Sony designed the SNES sound chip, the SPC700. It is unsurprising then that the Playstation's sound hardware is similar.
> The SNES APU was designed by Ken Kutaragi, who was also working on a CD-ROM add-on for the SNES before Nintendo canceled the project (likely due to seeing the Sega CD’s poor sales). After Nintendo shafted Sony on the SNES CD, Sony decided to make their own gaming console called the PlayStation, with Kutaragi as the lead hardware designer. Given this history, it’s no surprise that the SNES APU and PS1 SPU are extremely similar chips - they were designed by the same person!