WRT the H9000, each FX Chain's latency is variable, and depends upon a few things: https://www.eventideaudio.com/support/faq/whats-latency
We will be implementing a "DAW mode" which will make each FX Chain's latency fixed, instead of variable, but I don't have a timeline for that yet.
For now, a workaround would be to start with an algorithm in the 4th row of each FX Chain, and work upwards. This way the FX Chain's latency will be less variable than if you start with an algorithm in the 1st row and work downwards.
