HD Native - delay compensation

[jdproject1]

Hi

I have a HD Native card with Protools HD 9..

I am running hardware inserts... i have the 'delay compenstation engine' in the settings set to 'none' ... and buffer set to 128 samples... and i get a clean great sound from my hardware..

however when i turn the 'delay compensation engine' to long or short.. the sound from the hardware gets all funny and out of time when i playback...

is this normal?

[AllBread]

No, that doesn't sound right. What convertors are you using? I have the HD I/O's and they have never even cracked wise, much less been actually funny.

[mirrorboy]

Just to make sure.....

Once you change the settings....I believe you're supposed to restart PT.

Have you tried that or are you changing the delay comp settings then testing your hardware?


Scott

[Kingtone]

Originally Posted by mirrorboy

Just to make sure.....

Once you change the settings....I believe you're supposed to restart PT.

Have you tried that or are you changing the delay comp settings then testing your hardware?


Scott

You dont need to restart protools, it resets the audio engine automatically when you open and close the playback engine settings box.

Some more information from the OP would be helpful...
How are hardware inserts being used? individual tracks or on busses?
Are the tracks being routed to busses or direct to a hardware output?

[psycho_monkey]

The delay comp occasionally goes screwy with PT. We get it on the FW Lynx driver (which the more I use it, the more I wish I had the PCIe card!). Restarting the computer, not just PT or the lynx, fixes it. I assume you've done this already, so it's probably not the same issue for you...

[dbjp]

Originally Posted by psycho_monkey

The delay comp occasionally goes screwy with PT. We get it on the FW Lynx driver (which the more I use it, the more I wish I had the PCIe card!). Restarting the computer, not just PT or the lynx, fixes it. I assume you've done this already, so it's probably not the same issue for you...

HD's integration of adc is surely better though..
Not used HD Native yet but I've never had that problem with TDM.

[psycho_monkey]

Originally Posted by dbjp

HD's integration of adc is surely better though..
Not used HD Native yet but I've never had that problem with TDM.

Well, I'm pretty sure the problems I have are due to the Lynx driver - it's not actually PT at all. When it's working fine, the HD ADC and PT9 ADC should be the same. I've not had the issue with TDM either (well - I have seen PT TDM ADC not working correctly, and had to reboot to fix it - but it was a different issue).

[jdproject1]

Here is my system setup

mac osx 10.6.8
protools hd 9.0.3
hd native card
lynx aurora 16

im inserting hardware on the i/o inserts... i have an api lunchbox...
with 128 samples buffer size i get an awesome sound on my hardware.. very punchy.... this is when i dont use any delay compensation in the softwware setting...

however as soon as i turn on the delay compensation... it all goes screwy and out of time with the hardware...

now i must advise you the only reason i want to turn on delay compensation in the settings is in relation to the software plugins such as antares autotune i want to use... when the delay compensation is off.,,, the antares autotune is heavliy delayed and out of time.... but when i turn the delay compensation on... the antares autotune plugin works perfectly....

so i guess in the end... hardware inserts work like a dream with delay compensation switched OFF... but dont work correctly when its switched ON

and software plugins are heavily delayed when the delay compensation is switched OFF... but works great when switched on..

[mahler007]

Does HD automatically do delay compensation on inserts for non-Digi hardware? I know that the regular Pro Tools 9 does not, and you have to adjust it manually in the I/O --> Insert setup dialog.

If it doesn't, then this could be the problem. A previous GS user posted this handy little latency chart for use with the Lynx Aurora... I use it in my setup and never have any issues, but then again, I use non-HD PT 9, so it may be moot.

At 44.1k - 29 Samples - 0.66ms

At 48k - 29 Samples - 0.60ms

At 88.2k - 22 Samples - 0.25ms

At 96k - 22 Samples - 0.23ms

* These figures were computed by following the instructions in the Pro Tools User Guide (Page 963)

* The number of Samples divided by the Sample Rate = Milliseconds

Example: At 44.1k - 29 Samples divided by 44.1 = .66ms

Anyway, maybe this will be helpful...

[clipgod]

I am running the exact same setup and no problems at all here.
I always thought the lynx`s latency is identical to the Digi 192s, at least here it is without adding any manual values.
Is it possible that your session delay is longer than the max. value ADC can compensate?
I had this the other day using Waves DeBreath

[mirrorboy]

Originally Posted by mahler007

Does HD automatically do delay compensation on inserts for non-Digi hardware? I know that the regular Pro Tools 9 does not, and you have to adjust it manually in the I/O --> Insert setup dialog.

If it doesn't, then this could be the problem. A previous GS user posted this handy little latency chart for use with the Lynx Aurora... I use it in my setup and never have any issues, but then again, I use non-HD PT 9, so it may be moot.



Anyway, maybe this will be helpful...

I also run a Lynx Aurora 16. Except I run it with the Lynx AES 16e card / Pro Tools 9....not HD.

I've been having a nightmare of a time trying to get my hardware i/o right.

BUT...the above quote makes sense. Maybe what's happening is when you have it off, Pro Tools compensates correctly (the outboard gear). I know that when I instantiate an outboard i/o plug....the numbers change in the delay values area. So it appears to be compensating for something.

I imagine when turning it on...(the delay comp), unless you have the right numbers inserted into the hardware delay comp (under i/o settings) that the hardware would be all screwed up while the software would be fine.

On the other hand....I thought one of the advantages of having a native card (HD) was that you didn't have to worry about this.

I always have D.C. turned on (running at 88.2 so the longest one avail.) and the software plugs run great. It's just a matter of getting the numbers inserted into the Delay Comp area right. Maybe it is the same with HD Native....


Scott

[MTStudios]

You haven't got silly settings in your hardware inserts tab under I/O?

[dbjp]

Originally Posted by mahler007

Does HD automatically do delay compensation on inserts for non-Digi hardware? I know that the regular Pro Tools 9 does not, and you have to adjust it manually in the I/O --> Insert setup dialog.

If it doesn't, then this could be the problem. A previous GS user posted this handy little latency chart for use with the Lynx Aurora... I use it in my setup and never have any issues, but then again, I use non-HD PT 9, so it may be moot.



Anyway, maybe this will be helpful...

Lynx Aurora with the LT-HD card is precisely the same latency as the 192 i/o (purposely).
Absolutely no need to input manual delay time. It would screw things up if you do.
Like another poster said, maybe there's a plugin in there that's got too much latency?

If I were the OP I'd create a new session with a couple of tracks, ADC enabled, insert hardware and see how it goes.
Also make sure the i/o are like-for-like for your inserts. ie HW insert 1 will be out -> 9 in-> 9. Not out->9 in->12

Are you also in Advanced routing mode? (32 channel mode)