Latency offset problem (I/O plugin) [SOLVED]

Hi,

 

Logic Pro X shows ping +7293 samples. It's very big and strange latency offset. Normally i get ping +85 samples.

I have checked Logic 9 and ping is +85 as usual.

 

Where is the problem?

 

Thanks.

 

I use 2 x Mytek 8/192k.

It's really strange. Yesterday I made a few test page and the problem appears very random. Once opened, the project shows the correct value of ping +64 samples and re-opened changes the value to +7293 samples. In any case, the I / O plugin properly compensates for latency. I do not know quite what it is.

 

I suspect that this is a matter of Mytek's drivers...

Where's your Recording Delay set at? Should be 0 samples.

Where's your Recording Delay set at? Should be 0 samples.

 

No.

The recording delay will not change the ping values.

It will only move the recorded audio with the amount of samples that you specify to compensate for the delay.

 

The OP has has a roundtrip latency of +64 samples at the sample rate he is using.

He should then set the Recording delay to -64 samples to get sample accurate recordings.

I suspect that this is a matter of Mytek's drivers...

 

Could very well be it.

I remember issues with Apple's generic firewire driver where similar things could happen.

How are the converters connected to your computer, MADI, FW, USB?

Hey, it was a wild guess. I think we've seen enough cases with recording delay set to -5000 samples creating havoc.

Isn't Mytek one of the expensive brands?

The recording offset is set to "0". The problem is that LPX and LP9 shows totally different ping / latency offset of the I/O plugin. Why?

The recording offset is set to "0". The problem is that LPX and LP9 shows totally different ping / latency offset of the I/O plugin. Why?

 

How are the converters connected to your computer, MADI, FW, USB?

They are in the chain with firewire.

The problem is that LPX and LP9 shows totally different ping / latency offset of the I/O plugin. Why?

 

That is pretty strange.

Have you tried trashing the LPX preferences?

 

~/Library/Preferences/com.apple.logic10.plist

 

Is this on the same project converted to X or are you measuring the round trip on new empty projects?

Which version of OS X do you use?

 

They are in the chain with firewire.

 

Ok, I see that the driver is from June 2013. Have you tried contacting Mytek?

Hey, it was a wild guess.

 

Sorry if my reply was to harsh.

I just don't think that "Should be 0 Samples" is a good advice, specially not in this case where the OP has provided his roundtrip latency measurement.

 

I think we've seen enough cases with recording delay set to -5000 samples creating havoc.

 

We certainly have. I even had a local dealer call me asking why his recordings where misplaced.

 

Isn't Mytek one of the expensive brands?

 

Yes, I would not call them cheap.

Mytek Digital 8X192 ADDA - Vintage King Audio

Thnx a lot for yout help. Looks like drivers messed up with roundtrip latency. I have installed drivers one more time and it looks like problem gone. Anyway the offset is bigger - not 85 samples but 96... 44.1 kHz.

 

All the best & happy eastern

That's great Jurek!

Now set your recording delay to -96 if you are using 44,1 kHz.

How does one ping in LogicX? Is this usually automatic? I've had some weird latency things happening lately. Thanks for this thread.

Peace,

Kevin

You can use the I/O plug-in.

Thanks Eric!

You're welcome.

Hello everyone,

 

I've lost my original Recording Delay Offset numbers for the Apogee Duet (iOS/Mac).

My i/o ping plugin shows a latency of -1 sample @ 44.1khz. In Logic X, does that mean my "Recording Delay" slider [General < Devices] should be set to -1 samples or +1 samples? My latency is a little different than in Logic 9.1.8.

Update: Getting the system's "perceived" latency of -1 sample from the i/o ping plugin, I adjusted the "Recording Delay" slider to +1, and that seems to do the trick. I used the "Don't Stop Believin" loop test because it has real instruments and lots of different kinds of transients. It's not a complete null as I can make happen in Pro Tools LE 5.x-9.x, but it's extremely close. The buffer size seems not to matter, nor the plug in compensation: I punched in and out in different parts of the tune. The only thing that makes a difference is the Recording Delay slider. This may be a change in Logic X. Anyway, watch out for your preferences and offsets getting changed with software updates. Yikes.