Nice, I was mistaking "filter length" that X-MCFX convolver shows for latency.On my M1 Mac I have less overall latency. I can operate with smaller buffers. The convolver itself has the same latency. I am using Jriver into Element (convolver host) into MOTU pro audio interface. The audio is routed from Jriver to Element with Loopback software from Rogue Amoeba.
Indeed for me 65k tap filter (1.7s length, not delay) works wonderfully with minimum phase target and min phase crossover and TTD off
Zero latency added, no lip sync issues at all
I'll experiment with a little added TTD too, keeping everything else minimum phase and crossover. See if there's any lip sync