Targeting a sample rate of 48 KHz with 8-bit samples would mean the cartridge could only fit 20 seconds of raw audio into its 1MB of storage. This wasn’t good enough, so the audio would have to ...
Specifically, the update enabled Sonos speakers to play audio up to 24-bit/48 kHz, which is much better than MP3-quality audio and even better than standard CD-quality audio (16-bit/44.1 kHz).