There’s no part of a 565 that does 96k. Not the digital inputs, not the ADC, not the processing, not the DACs and not the digital outputs.
The best thing to do with a spare 565 is give it away, or use it as a case for a project. It was great in its day, but its day was 30 years ago. After only 6 of those years we had the 568.

Why not just get an optical to SPDIF converter that does 96k and bypass the 565? You could hook up the 565 for comms only to have a working volume control…


Lounge: G61RSL, DSP3200, DSP3300, DSW, HD621+Vertex2, SBT, Kef Ci160.
Office: DSP33, D1500, SBT
Archive: 568.2m, 562v3, 562v, DSP3100