Avid HDX latency PTHD vs other DAWs

[kikidi]

Hello,

I'm a new hdx user, maybe you could help me.

Is it possible to have the same low latency for tracking in Logic (or whatever daw) as in PT HD ?

When I record in PT HD, this is perfect I cannot hear the latency. But in Logic, even if I put the lowest buffer, I can hear a little latency, as it was phasey.

I tried to put the lowest buffer inside Logic and also inside the avidaudioserver.app.

Moreover, the buffers change seems to be taken into account only in the avidaudioserver app and not when I change in Logic. Is it normal ?

Also, weird things : Some youtube videos or some wav files (not all) plays under 3/4 output instead of the 1/2 output when I play in firefox or quicktime player.
But when I play in google chrome or in old quicktime 7 player it works fine.

I'm really thinking of formatting and redo a fresh start with my mac :)

Thank in advance for your help !

[BScout]

No.

[Darryl Ramm]

^^^. And the reason why is Pro Tools is talking to the DSP based hardware mixer in HDX directly, and running DSP plugins there as well if wanted. Other DAWS only get to talk to the HDX hardware via CoreAudio or ASIO... which implicitly is going out through latency adding IO buffers to the DAW. And if plugins are wanted there they can't run those on the HDX DSP either.

[kikidi]

Awesome ! Thanks a lot for your replies.

[JCollet]

I know this thread is old, but since I was looking forever for a solution, there is: right-click HDX in audio-midi setup, select "configure device". There you can the the buffer which adds onto your DAW's

[LDS]

Originally Posted by JCollet

I know this thread is old, but since I was looking forever for a solution, there is: right-click HDX in audio-midi setup, select "configure device". There you can the the buffer which adds onto your DAW's

According to the first post, the OP has already tried setting the buffer to its lowest setting. Their experience with Avid coreaudio drivers is similar to a lot of other peoples, I think. Reducing the sample buffer will help minimise the latency, but it still doesn't get HDX or HDN devices anywhere near the latency they have inside Pro Tools, or other low-latency native counterparts like RME or Lynx devices.

Some food for thought. At 48kHz:
- HDX has a base latency of ~1.7ms in Pro Tools.
- HD Native with a 32 sample buffer will have a latency of ~2.5ms in Pro Tools.

When running in Logic with a 32 sample buffer using the coreaudio drivers, they both have a latency of around ~14ms. For some people that will work just fine, but for many people who purchased HDX or HDN to use for low latency monitoring, it is obviously magnitudes worse under coreaudio/ASIO than it is inside of Pro Tools. Just for comparisons sake, an RME HDSPe Madi card will have a latency of ~3ms at 32 sample buffers in both Pro Tools & Logic. To get anywhere near the ~14ms of HDX or HDN running under coreaudio, you would need to set the RME to a sample buffer of 256.