Crackling with Behringer ada8000 and Profire 2626

[mattjew24]

Is the Profire properly sync'd with the ADA8000? I have a Profire 2626 sync'd with two ada's and its pretty solid.

[mattjew24]

Make sure the Behringer has the correct sample rate chosen on the back also

[Topsoul182]

Sorry for the late response,

Yes I had it synced and working correctly. The only thing I did was take it out of one rack and put it in another. I bought new lightpipe cables and its still making the cracking sound.

And I have it set to slave 44.1 on the back and I have it all set up correctly on the dsp for the 2626.

https://dl.dropbox.com/u/1950013/cubase.jpg

[Neonknight]

I had a listen to the clip and there is quite a bit of hum on there which lead me to think that it might be an ground loop issue, personally i would test removing the ADA8000 from the rack completely and also the input/output cables so that there is no other possible ground connection than the ground from the powerplug present.

Also be sure to have all equipment connected to power at the same point as closely together as possible, if you connect one piece to one wall power outlet and another to the wall outlet a few meters away it may make a big difference since there might be quite large differences in voltage potential between outlets.

Try and test if you get these noises after you have done this and the noise is gone then you can add connections, mount it in the rack step by step and test if these are the cause of the noise.

One other possibility is that this click noise is due to digital distortion at some stage, the hum noise seem pretty high in the recording, maybe it is causing digital clipping somewhere which also sounds like that.

If you are in Europe like me or another place where you can turn the power connector 180 degres it might be something to try doing this on the different pieces of your equipment one by one.

Oh, and if you use a laptop the powersupplies are known to cause problems with groundloops, try running on battery as a test if you have a laptop. I have had this problem myself.

[CJ Mastering]

Do you have the slave and master for the clocking set up correclty. Make sure you set the master to what ever you want to control the clocking

Cj

[Topsoul182]

Right now I have 2 monitors, profire, ada8000, computer, monitor, gap pre all plugged into the same power strip. I wouldnt be surprised if its a ground issue cuz i have an old house. Would a power conditioner help with that? I always thought those were just glorified power strips, but at this point I'm willing to give it a try

[mattjew24]

Definitely do what the guy above said about testing various wall outlets etc. I am personally considering selling these two ADA8000s because the preamps are the worst I've ever heard.

You could try syncing them using a BNC cable from the profire's breakout cable...

[Topsoul182]

I use them for triggers. I have the 2626 for all the mics and then the triggers and spot mics with the ada. I may be interested in buying them if the outlets aren't the problem

[mattjew24]

Ah I see. I've used them for live recording and it is fine. I would consider selling one or two. They were brand new when I bought them, just been sitting in my little rack ever since. It really is a great way to add 8ins and outs but I realize I have never used more than 16 inputs anyway.