AptX Adaptive (2018+) is the only one that supports 96/24 at best, so well-shielded RCA cables from a wired DAC would probably degrade the signal less than the

AptX Adaptive (2018+) is the only one that supports 96/24 at best, so well-shielded RCA cables from a wired DAC would probably degrade the signal less than the downmix for AptX Adaptive would, assuming your devices even support AptX Adaptive.