Protools HD11 - Coreaudio - negative H/W Insert Offset required?

[LDS]

Hey Chaps!

I am just setting up my system and have hit a hurdle when it comes to the I/O menu. Specifically the H/W Delay Offsets.

I have followed the instructions in the manual about determining the amount of hardware offset needed... but it appears as though I need a negative value???

If you have a look at this - http://www.soundonsound.com/sos/feb1...es/pt-0213.htm

There are images that show how the protools mixer is set up, and the resulting tracks. The problem I have currently is that the newly recorded track (track 2 in the SOS article) is 200 samples AHEAD of track 1.

If I enter the value in milliseconds (about 5.something), then repeat the process recording the output of channel 1 to a new track - the resulting waveform is ANOTHER 200 odd samples ahead again.

What the fugg is going on? Why is my audio time traveling?

[LDS]

Nothing?

Nadda?

No one else experiencing this problem?

[Matt Hepworth]

Are you running plugins on Master? I believe PDC is still not supported on Master.

[LDS]

Hey Matt!

Thanks for the reply.

There is nothing on the master at all. The only 'plugin' is one instance of external effect as per the instructions in the Protools manual.

I upgraded from HD 11.1.2 to HD 11.2.1.

There was a noticeable improvement running exactly the same test.
The offset dropped to just 7 samples! But it still means the resulting audio is being delay compensated too much!

I have run the same test in HD10 and I get exactly the same result - the audio being recorded to track 2 is 7 samples too early!

If you have a look at the screenshot of the protools mixer of HD11, you will notice that channel 1 is being delay compensated by 1240 samples. This happens as soon as I add the external effect to the channel.

What I don't understand is, why is it doing this? Is 1240 samples the absolute value of ADC needed by HDx/HDn to make hardware inserts phase accurate?

If it is, why isn't it bypassed when running coreaudio? This bug is effectively making the I/O plugin delay menu absolutely useless. It is set to 0.00ms in this test. If I add any other value to it, the audio on track 2 moves even further in front of the audio on track 1.

[Matt Hepworth]

What's your interface? Are you running HDN or HDX?

[LDS]

The problem doesn't exist with HDN. It occurs when running a Lynx Aurora 16 via USB and coreaudio.

[LDS]

Nobody has anything to add on this??

Surely this indicates a bug somewhere?

Either in Protools ADC or the latency being reported by the Lynx USB card?

[Southsidemusic]

Originally Posted by LDS

Nobody has anything to add on this??

Surely this indicates a bug somewhere?

Either in Protools ADC or the latency being reported by the Lynx USB card?

Can you please keep it to one thread per problem as you now have 2 threads with the same discussion and thats against the TOS seen on the top of the pages.

Thanks
Christopher

[LDS]

Its much worse than you think, Chris.

I have asked this same question 5 times over 4 forums in the last 12 days. So far the only response it has garnered from an affiliate of either company involved is a reprimand for the efforts I am going to to try and actually get a response to the question.

While the TOS have been duly noted, and your role and commitment to the forum respected, your reply has only fuelled my frustration.

Where can I find someone whom will address my question, Chris?

[Southsidemusic]

Originally Posted by LDS

Its much worse than you think, Chris.

I have asked this same question 5 times over 4 forums in the last 12 days. So far the only response it has garnered from an affiliate of either company involved is a reprimand for the efforts I am going to to try and actually get a response to the question.

While the TOS have been duly noted, and your role and commitment to the forum respected, your reply has only fuelled my frustration.

Where can I find someone whom will address my question, Chris?

Well regarding your problem the only thing is to wait for someone who knows this to answer. Unfortunately the double and tripple posts will de removed and if you need to revive a thread just bump it. Rules are rules and the one post per issue is there for a reason. Imagine if everyone posted the same things in several threads and sections

Anyway, if you don't get any help here you might have to buy a ASC from Avid and call them to help you out but making several threads is nit the answer,

Best Regards
Christopher