Meridian Upsampling Filters

What filters do I need to use in Roon to most closely mimic Meridian upsampling?

IIRC, smooth (= slow roll off), minimum phase. In a test though, I preferred smooth linear phase (I think).

But bear in mind, there are an infinite number of “apodizing” minimum phase filters. Bob once said that they had a variety of candidates and the one that sounded the best --from listening tests-- required the most DSP, much to Rhonda Wilson’s chagrin. He once also said at an AES meeting I attended that the Meridian filter had a “hand-crafted null”, whatever that means; and he is on record as saying that he was pretty sure that no one else had anything quite the same.

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