I’ve added a Toslink output to my Blu 2 as follows: A male BNC to RCA male adaptor on the Blu 2’s digital out: https://www.amazon.co.uk/gp/product/B009OARV4K/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1 The following SPDIF to Toslink convertor: https://www.amazon.co.uk/gp/product/B002WSAB8E/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1 I have a spare LPS-1 (after upgrading to the LPS 1.2) which I use to power it - 5v/1A The Toslink cable supplied with the Dave goes from the convertor to the Dave. All upsampling is turned off, so it’s just plain vanilla Red Book into the Dave. It sounds glorious and much better than BNC Blu 2 to Dave. I’m afraid the interface between the RFI generated by the BLU 2 and Dave’s ground plane is a major issue for me. I accept, this is a rather odd arrangement, and probabably not for anyone apart from an oddball like me. I now have two optical sources into the Dave — the above and and Aries Mini for Tidal, and battery USB, an IsoRegen with LPS-1.2 battery power supply. All sound good to me.