Just start with one or a few tracks and H/W inserts on an audio track. When doing this test do it all first with no plugins and very simple session, you don't want to be chasing other plugin delay comp or phase change issues. nothing here should be too difficult to do to get great results. Yes Avid could make all this easier with a ping function, and UI/UX improvements, and it's embarrassing for them that Pro Tools is so bad here, but add that to a list of other latency comp bugs including with Carbon. And this latency is physically fixed and cannot change (unless you change sample rates). and I never would when I have a tool in front of me that can measure those values, and let me set them, and confirm they are correct to a sample or so). No need to rely on any vendor latency specs. You need to change this only if you change the sample rate. Measure the difference accurately in samples (you should be able to measure that latency to ~one sample accuracy) and apply that in the +/- field for every track that has a H/W insert on it using that same box. You need to make one measurement comparing a transient that you send to the H/W insert to the return signal. And you can't set those insert latencies to negative time so it won't handle many cases. Probably better to null out any latency compensation errors there then in the Setup>I/O>Insert settings which is really intended to correct for latency in the outboard insert box. You can manually adjust the track delay comp +/- setting to correct this. All this happens once you turn delay comp on which is required to correct for hardware inserts. If your box has less real latency the signal will be offset negative time compared to others, if your box takes more time to do a conversion it will be shifted to positive time compared to other signals. Not all vendors' Digilink interfaces deliver that same latency the Avid box they emulate. Pro Tools is correcting for whatever latency the genuine Avid box has that your box is emulating. When you say "insert external I/O" you mean you are just enabling the H/W insert on that track but the insert is physically just a straight through cable? You should be able to fix this as well as you can get with any Avid interface(s). What you are seeing is expected behavior, but finding interfaces with claims of the same latency is likely not worth worrying about, just fix it in your session. My question is with genuine Avid interfaces (MTRX, MTRX Studio, Carbon, Analog HD 16 I/O) is it 100% solid timing even when using parallel compression? Trying to figure out if I set my expectations to high or if the issue is just the Antelope interface. I don't think routing to external hardware and back would be a problem unless it's parallel compression and some of that faint phasing sound would be a problem. Antelope provide Delay Compensation Settings where you can manually adjust which locks it in 99.9%. I realize it's not a genuine Avid branded interface. I was hoping with the Galaxy 64 setup to HDX Auto Delay Compensation, Pro Tools would take of this automatically. In Pro Tools Ultimate when I insert external I/o for one of the click tracks there is a slight phasing. I'm just running analog DB25 output 9-16 to DB25 input 9-16. On one of the tracks I am routing to analog out 9 on my Galaxy, and back in on input 9. I've setup 2 Aux tracks, each with Click II. I'm using an Antelope Galaxy 64 which has four Mini Digilink ports. Hi all, I'm attempting to use external hardware inserts on my HDX2 system.
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