But true 24 bit audio is NOT on CD. And DVD-A High Res is not universal, and the most annoying user interface for 2 channel audiophiles. Only selected players equipped to play it could. Only 16 bit/44.1 Khz audio for CD. SACD hybrids were the superior high res disc format for everyman.
Also remember Philips and Sony had to work around the limitations of digital technology (and data for premastered digital audio was not stored on computer workstations, it was on Sony PCM-1600, PCM-1610, and PCM-1630 processors, which used U-Matic video cassettes or Beta cassettes to store the digital audio data). That technology then was the Lingua Franca of CD pre-mastering for glass masters to be prepared for CD replication. This is early 1980's technology being discussed.