Submixing outside 001-latency problem

With my setup I have sent 14 outputs from my DIGI (8 adat + 6 analog) into a Tascam DM-24, mixed these tracks and then sent the DM-24 stereo bus back into Pro Tools LE via S/PDIF. I'm concerned with the latency here, if I increase the HW buffer setting- all the DM-24 mixed tracks go noticably out of time w/ the rest of the mix...anyone know a way around this??????????????????????????

Yes. Any tracks that are still being mixed in Pro Tools should be dedicated to 2 inputs on the DM24. This stereo pair would be most convenient on S/PDIF... but doesn't really matter. Monitor this ProTools mix with the DM24 mix and they'll both have the same latency. You may need to make use of SOLO SAFE. Command-click on a the Solo button of a track and it will grey out, showing that it will not be muted when another track is solo'd. Your only other option is to record the DM-24 submix and nudge it forward afterwards. Nudge value on a digital transfer would be 2 x buffer setting. Add 51 samples for D/A A/D conversion.

Thanks CCash. DO you mean to monitor the submixed tracks and the st. buss out of the digi together as 2 pairs of stereo mixes? Or that I should monitor the fully combined signals as 1 stereo mix on the DM-24 ( I thinks that's how Tascam explains it). If you mean the former, I guess that would be making the DM-24 the final summing buss...

Couldn't you just apply a predelay (via the mixer channel settings) for the tracks being sent externally, just like when routing to external effects?

"pre-delay" You'd think so. Doesnt exist. Youll need to delay the : "other" tracks if you want to go that route.

Yeah, either way. I don't really know exactly how you want to work, but let's assume that you want to record the DM-24 submix to a stereo track in Protools, and mix this submix with the other PT tracks... You could just final your mix in the DM-24... Combine the PT stereo mix with the DM-24 stereo mix and send that to a new stero pair in PT. Monitor that. Now you have your final mix on a stereo track. Or... you can keep them separate... you'd have both pairs up on the DM-24 and monitor there. If you monitor in ProTools, you'll need to loop the PT mix back in with the DM-24 mix (to keep the latency the same). You could return them on 2 separate stereo tracks, or on stereo auxes, etc... See, there are so many ways to do it. All depends on what you want in the end. I would: Pass a click sound from a PT track to the DM-24 and record it into a new PT track. Measure this offset (in samples) of the original track and the new track, and now you have a known, fixed, latency value. Do this for all of the various hardware buffer settings you might use, and write them down. Now monitor using the DM-24. Monitor the DM-24 submix with the PT submix. Your monitor delay is the same for both, which will be less annoying. The PT mix is just a delayed "dummy mix" in this case. Print the DM-24 mix to PT. Be sure to have the DM-24 track muted in PT while recording or you'll get a loop. When you're done recording, nudge the DM-24 region to the left by the offset amount you wrote down for the buffer setting (in samples). Now the DM-24 track is in time with the original PT tracks, and you can bounce this as your final mix. Sorry if I confused you.

thanks for the help man, it's much appreciated.