PT Not Reading Mic Signal on MOTU 8Pre USB
 

Hi guys,

I added a new secondary (slave) preamp unit to my DAW yesterday but when I went for a mic test I’m not getting signal in PT, even though I’m seeing signal readings on both the unit itself, as well as within the virtual mixer software.

Here are my setup specs:

I’m on PT 12.5 on Mac laptop OS 10.11.6
Main audio interface is MOTU 828 mkiii
Slave preamp unit is MOTU 8Pre USB (the newer usb version, not the older FireWire version)

I have the two Motu units connected via ADAT expansion, with the 8Pre as slave unit.

PT is not recognizing mic pre input via ADAT expansion. It recognizes the primary interface’s (828 mkiii) line level, but not the slave’s line level.

All settings changed appropriately on computer. Aggregate set to same bit depth. Sample rate 44100. Using master as clock.

To be clear, we are seeing signal readings on the interface and on the virtual mixer software (Cue FX) but PT is not reading level. This makes me think that it could be some PT setting that needs adjusting? Or is there a compatibility issue with the 8Pre and the Mac OS version I’m using? Not sure.

If anyone has ideas on what to try I’d appreciate it. Thanks!








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Re: PT Not Reading Mic Signal on MOTU 8Pre USB
 

Hi by your description everything seems good to me in the setup . All i can think is that you can default the I/O and buss in PT preferences and see of this makes any change .

I don't have any experience with that interfaces so i can't go beyond .

Hope this help !

Re: PT Not Reading Mic Signal on MOTU 8Pre USB
 

If you’re connecting the 8Pre to the 828 via ADAT, you should not be using the aggregate layer, but directly addressing the 828 instead.

If you only use one ADAT cable, the 8Pre would be clock master and the 828 would slave to the incoming ADAT connection. If you use two ADAT cables, one each direction, then the 828 can be clock master and the 8Pre would sync to the incoming ADAT connection.

In Pro Tools, you would find the 8Pre signal appearing at the 828 ADAT input channels. If you change the order or number of I/O channels available with your interface post session creation, you need to update those in Pro Tools. Go to the I/O setup window in Pro Tools and delete and default the paths on the input, output, and bus tabs and all will be good.

Re: PT Not Reading Mic Signal on MOTU 8Pre USB
 

Hi jimmy, thanks for replying. We gave that a shot but it didn’t seem to make a difference.
With a little more fiddling however, we realized it had to do with settings on MOTU’s CueFX software setup. You have to route the inputs as pairs in the virtual mixer and it’s a really counterintuitive process, probably other brands of interfaces are way easier to setup.

That said, issue is now solved. Just wanted to get back and say thanks for your input, much appreciated!



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