Hello jack community, I am trying to run two separate Jack instances, one for low latency monitoring using Carla as a plugin host and one for recording using Ardour with a higher buffersize for performance. The two jack servers are connected by zita-njbridge. Its working quite well so far, the issue is that I cannot compensate for the latency of the zita-bridges, 2*10ms. To my knowledge, jack provides latency information to Ardour, so i need to inform jack about the latency happening. I tried the following setups: Main Jack, alsa backend using USB Interface (Presonus Audiobox USB96) Ardour Jack, dummy backend and Main Jack, alsa backend using USB Interface Ardour Jack, alsa backend using onboard audio (Intel 8 Series/C220 if it matters) Signal way in both cases for recording is: System in Main Jack - Zita to Ardour-Jack - Ardour - Zita to Main Jack - System out Main Jack So I never use the onboard physical connections. The first setup is problematic because the dummy backend doesn't have extra latency options, the latter seems to be ignoring the -I -O numbers in the Ardour-Jack, at least jack_iodelay tells me the same frame count no matter what I enter, which is not the case in the Main-Jack, where I can get it to 0 with the correct settings. So I get late recordings by 20ms from zita + the latency of the Main-Jack, that the Ardour-Jack doesn't know about. Is there any way to make this work? And why is the Ardour-Jack ignoring my extra latency settings? Even though I don't think it matters too much, I'm on Arch Linux, and using jack2 1.9.16-1 and Ardour 6.3-3. Looking forward to your replies, stay safe and healthy! Best regards, Robin