Wasn’t that MQA? Ok, a bit more than just firmware, but didn’t > 96/24 get to select DSP’s in the end?

Meridian owner since 1992
Prime & PSU, Focal Elear headphones, Roon (ROCK 8Gi5 NUC), Explorer 1 & 2, F80. 200/203, various Sonos (via Roon).