Any way to prevent Avid HD I/O default to 192kHz
 

I've got the HD I/O, loop sync master, feeding a Focusrite 16Line and a Focusrite HD32R.

When protools is quit, the HD I/O defaults to 192kHz, which throws the Focusrite HD32R into 'expansion' mode, so when I restart ProTools, it sees a different number of audio interfaces and makes me quit and restart until I can get it started in 48kHz.

Any way to prevent?

Re: Any way to prevent Avid HD I/O default to 192kHz
 

Are you on Mac or Windows? If Mac, can you change the sample rate in audio midi setup? If Windows, can you change the sample rate in the Windows audio device settings or via the ASIO driver in a third party audio app?

Re: Any way to prevent Avid HD I/O default to 192kHz
 

On a Mac. Audio Midi setup doesn't seem to have any settings that would relate.

Re: Any way to prevent Avid HD I/O default to 192kHz
 

Can you access the hardware settings via another audio app using coreaudio?

Re: Any way to prevent Avid HD I/O default to 192kHz
 

It is AudioMidi Setup that needs to be changed.
Close Pro Tools
Open AudioMIDI Setup
Go to the "Avid HDX" audio device
At the top in the right column, set your clock source (if using an external word clock otherwise internal). And then in Format, set it to what you want it to default to. (I set mine to 48k)

Re: Any way to prevent Avid HD I/O default to 192kHz
 

Awesome! Great info! Been dealing with this issue myself. It always defaults to 192.


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Re: Any way to prevent Avid HD I/O default to 192kHz
 

Same thing happens with the MTRX- it is Avid's Core Audio HDX driver, which I am not a fan of anyway.

Re: Any way to prevent Avid HD I/O default to 192kHz
 

So I realized I am using the native thunderbolt and not HDX after I read this again. I change the default sample rate and interface but as soon as the interfaces are turned off and I come back to it, It still defaults to 192. My main issue is I have an apogee DA16X as my second interface after my Red Line 16 and thats what seems to get more confused and "Stuck" especially after changing sample rates... I guess its just something the core audio won't remember in the setup?

Re: Any way to prevent Avid HD I/O default to 192kHz
 

every couple weeks I have the "stuck at 192" issue with one of my HD I/O interfaces freaking out, all metering led's fully lit.. it is a major pain and involves multiple reboots / turning interfaces on and off until everything is smooth again.

It would be super helpful to create a startup script for MacOS to change Audio Midi Setup defaults to 44.1 or 48 KHz to prevent the interfaces going to 192 KHz in the first place.

I never go above 96 KHz, which is also a limitation of the 100ft DigiLink cables in the studio.

Re: Any way to prevent Avid HD I/O default to 192kHz
 

You don't need a startup script. Setting the clock once in Audio MIDI Setup makes it stick. (only unless you update/change the driver could it change because then it sees it as a new device)
If it doesn't stick, you have a corrupt system file (best to delete the plist file for AMS and let it rebuild)