tomthiel
Nice catch ! On the Sony S9000Es player. Those remotes are plentiful on eBay.
Now, to address your query. All of my spinners, minus the AYRE, have those Digital “filters”. While it is a marketing ploy, to a degree, these are fine-tuning tone controls for CD or SACD playback. Test drive each filter or setting to your ear brain. Purely customized to the user’s taste. Both S9000es and SCD-1 are very well annotated and documented in Audio forums. You will have zero trouble finding out pertinent information on both machines.
Those filters are very subtle. You will find the one that best suits your personal Playback taste. Try to have a quiet environment for best outcome. Keep me posted as you finagle this fun process. Let me know if you have any questions.
Happy Listening!