You can use a DAC, according to the docs, there are loads supported as the other...

_joel on April 17, 2022 | parent | context | favorite | on: Dexed FM synthesizer similar to DX7 running on bar...

You can use a DAC, according to the docs, there are loads supported as the other commenter suggests. I've got one of these https://www.hifiberry.com/dacs/