Driver Error Compensation: random values !

Dr. Zoiberg · Post by **Dr. Zoiberg** » Mon Feb 05, 2007 10:53 pm

Yes I tried, as stated a few posts above.

Anyway I've just tried again, with built-in audio only.
First time it was 5ms. I put this value into the preferences, then I loaded one of my projects and let it play.
I went back to the driver error compensation test and this time it's 26ms later (+5ms in the preferences).

Switching from core audio to no audio, then back to core audio fixes this (just for a bit).

Dr. Zoiberg · Post by **Dr. Zoiberg** » Tue Feb 06, 2007 12:43 am

And here is a screenshot of how I set up audio preferences for the test:

Dr. Zoiberg · Post by **Dr. Zoiberg** » Tue Feb 06, 2007 2:28 pm

I repeated the test with my Powerbook G4 1.25ghz.
Mac OS 10.4.8
Live 6.0.3

Interesting results:

- Built-in audio seems stable (unlike the Macbook Pro).

- Xone 3D drifts - resetting the driver temporarily fixes the offset (goes back to 3ms)

serotoninsteve · Post by **serotoninsteve** » Tue Feb 06, 2007 10:54 pm

You where right,
seems to be a driver but couldn't remember.
I'll come back on this once I have a Jack/jack cable.
Strange that the xone drifts on the Powerbook
and uses the same driver as the inbuilt.

And why are they all called core audio?

Dr. Zoiberg · Post by **Dr. Zoiberg** » Tue Feb 06, 2007 11:27 pm

serotoninsteve wrote:Strange that the xone drifts on the Powerbook
and uses the same driver as the inbuilt.
And why are they all called core audio?

Yes that's strange, and I also found that the Powerbook built-in overall audio latency is 10ms less than the macbook pro.
I don't know, the two built-in audio devices are quite different: 16bit/44.1khz vs. 24bit/96khz, the latter also has digital in/out... maybe the driver behaves in a different way.

I find more reassuring the fact that the Xone 3D drifts on both laptops: at last there's evidence that I don't imagine things.

Think of "Core Audio" = "Asio"

Dr. Zoiberg · Post by **Dr. Zoiberg** » Wed Feb 07, 2007 4:03 pm

Allen&Heath has confirmed the problem and they believe this is an issue with the Apple driver.

Serotoninsteve, you don't need to test

Thanks for the help!

A&H is recommended, great products and the best support !

Now let's see how long it takes Apple to fix this.

EDIT: on second thought, I don't think Ableton have been able to reproduce this.

samusaran · Post by **samusaran** » Mon Jul 02, 2007 10:51 pm

i just posted about this issue here:
http://www.ableton.com/forum/viewtopic. ... 533#504533
but this is driving me crazy, any new info on this situation?

Dr. Zoiberg · Post by **Dr. Zoiberg** » Tue Jul 03, 2007 1:33 pm

maybe 10.4.10 fixes this issue ?
have you tried?

samusaran · Post by **samusaran** » Wed Jul 04, 2007 9:50 pm

tried upgradin to 10.4.10, still having the same problem... i mention this in the other post but ill say it here too, i ran live 6.0.7 on my old 2ghz celeron pc desktop i got in 04 and it runs perfectly, no more jumping compenstation values!! so this would definately appear to be a core audio problem.. ive been going thru the forums on apple.com but cant find any helpful or hopeful info yet.. lemme know if you find anything out!! thanks