Computer Noise with Digi Core Audio Manager

[Adam Peters]

Hi, I've just purchased an MBox with LE 6.7 when i use the MBox as my audio outs within any application includine Pro Tools i have a high pitched computer noise coming through. I have reconnected my previous soundcard and this problem goes away so it is specifically with the Digi Core Audio manager as when i quit this it also disappears. I would be very grateful if someone could help me with this issue as i'm going insane trying to solve it. All conections have been swapped and checked. Thanks Add

[vinark]

as I said on the pc forum , Try a powered usb hub!

[Adam Peters]

I'm coming out of the port from the back of the mac is that not powered? It's one of the ports that come with the mac.

[vinark]

yes ofcourse it is powered but sometimes that powerline is very noisy, not well shielded. That´s why a powered hub might help it´s saperate from your mac. Without power the m box doesn´t work and if you use an unpowered hub you are using the same noisy power from your mac.
good luck!

[Adam Peters]

I've just tried a powered USB hub and it has made no difference the problem is still there. When i use headphones out of the MBoz headphone out there is no noise. Any ideas? Its not the speakers as with my old sound card the was no problem.

[vinark]

sorry to hear that, when I had the problem it was also on the headphones out. But just as with you it started with the audio driver.( so no noise when it wasn´t running). I think because there is no noise on the headphones, the noise is comming through the shielding/ground. Sincs the m-box has symetrical outs, you could try connecting it with (if you use symetrical cabling) withouth the earth/shielding connected. Just modifie one cable and only make one connection at that point. If it helps make another one. To exclude a defective m-box you could try it on a different system (a pc maybe) and see if that helps. I f it has the exact same problem, the unit might be the problem.
Good luck!!

[Niljam]

Try using a very short USB-cable. It worked for me, reducing the noise/whine by about 50% to an acceptable level.
It's strange though, that Digi has never recognized this fairly common issue...