New Mac Pro... Now I Have Latency Via Busses...

[rainmaker]

I just bought a new 12 core Mac Pro to update my aging Mac Pro and have been loving the added power. Everything seems to be going pretty well with the transition. However, I have run into one thing that I just can't figure out.

I have always been able to assign a group of tracks to a bus (let's say bus 9-10) and then create an aux track with the input set to bus 9-10 to control the volume of the sub-group. This has always worked with my older Mac Pro and DP 7.24. I haven't changed anything else except for the computer and now when I assign tracks to a stereo bus and try to route that into an aux track, I get a bunch of latency/delay on whatever tracks are being routed there.

I can't figure out what is different? I have checked that latency compensation is turned on and it is. I get the latency with no plugins on the tracks at all. Just routing the tracks into the stereo bus and assigning it to an uax creates the latency. Funny thing is when I turn auto latency compensation off, everything is in time.

What am I missing here? It's got to be a setting or something I'm just not thinking about.

Thanks,
Rainmaker

[rainmaker]

Ok, even weirder. In the time I spent writing the initial post I just let DP sit open in the background. When I closed Safari after posting, I clicked play and everything was magically in time again. I didn't do anything. So I thought maybe I had left auto latency compensation off by mistake since that was the only way I was getting it to play in time. So I went into the Studio Settings to check and it was still turned on. So I canceled that window thinking everything was just somehow working and once it got done with the beachball now everything is late again.

I don't get it.

[rainmaker]

Hmmm... still just playing around with this and trying different things. I deleted the aux track and the stereo bus in the Bundles and recreated the aux track and now everything is playing in time.

Weird. I've never seen DP do that before with a bus and an aux. Has anyone else seen this behavior?

[Dan Worley]

Once in a great while DP will get confused and do that to me. Maybe three of four times a year. My thing is to quit and restart and that has always fixed it. I don't know the cause of it.

Here's hoping it will continue working glitch free for you from here on out.

[ccrane]

Oh yeah, this will happen from time to time. DP gets a little flaky in the aux dept occasionally. Usually what will fix it is going to bundles and changing the bus assignment that the delayed aux is assigned to. It sometimes creeps back though. Sometimes it's such a slight delay that it only causes a little phase shift in the sound - that happens far more rarely. I'm not sure, but sometimes freezing a track (which uses a DP assigned aux temporarily) seems to contributes to the problem. Also, for some reason, I seem to have better results with an aux stereo bus if it starts on an odd number, i.e 23/23 not 24/25 - this may just be coincidence however. Ultimately though, I don't know why this behavior happens.

[ccrane]

Just had this happen again. Restarting computer made no difference, re-routing aux to a different bus/s made no difference. Loading chunk into a new session also did not fix the latency. Deleting the aux and then recreating it is what fixed it.