Chromecast 48kHz Option gone?

Contrary to some reports on the web, my Chromecast Audio is still showing dropouts @96kHz on Toslink with FW 1.29.154182.
Interestingly, through the analogue output, no dropouts @96kHz.
When I tried to limit the samplerate to 48kHz, I found the option gone on the setup screen.

Am I doing something wrong here, or is this by design?

You are looking in the wrong place – click on the speaker icon and you’ll see an icon for DSP. Click there and you will see the option for Sample Rate Conversion

Thanks @Tom_Ryburn, got it working.
I seemed to remember that there used to be a maximum samplerate setting on the settings screen, but I must have been mistaken.