I cannot detect what people name " digital glare" in my audio system (files read from the computer)… But I remember very well when I listened to that " glare" on some very known and atrocious dac, or some few others less atrocious one some years ago... Thanks to my actual dac, Starting Point Systems nos dac, my sound is organic, 3-d, musical, with an increasing better imaging, but mostly thanks to my continuous tweaking...
Very good dac exist, this is the first point.... Taking care of the level of noise in your electrical house audio embeddings my second point... After that you will be no more hearing glare...
(By the way a power conditioner are not a solution for that in itself, it is not enough,neither some cables change are sufficient to kill the "glare")