I've decided to go the cheap route to begin experimentation. Purchased a Chromecast Audio, a 3ft Toslink adaptor/cable, and a subscription to Tidal.
Let's see if the jitter issue truly becomes an issue (no pun) with the Toslink/optical connectivity to the 861 DAC. If so, then I will look into Steve's suggestion which enables BNC and RCA connectivity to the DAC.
Thanks again for your suggestions.