All 8 outputs have a constant noise floor of -50db. All outputs require lots of gain so that noise floor is amplified. Seems to be lots of grounding issues with these units. I love the workflow but this noise floor is bad. The fact the outputs are not line level and more like a mic level doesn’t help.
I can’t say I have that issue , is this with compression of some sort ?
To get any floor I have to ramp up the gain to a level I’d never have it.
That said the individual out are a little quiet , but assumed their was a technical reason for that.
I think I’m gonna get the dsp board though because I love the sound of everything summed through the main outs.
Your post caught my interest, so I decided to test my own 2400 and system.
Outputs 1 and 2 (dynamic filter off) directly into the audio interface (line in channels) with TRS cables - recorded silence at 48Khz 24 bit. Gain at 0db on the 2400 channels and unity on the interface.
There is no discernible noise floor present - with the lowest amplitude of the range being at -158.9db RMS. I’ve never had any grounding issues causing a problem either.
Not sure what’s happening with your set-up.
My unit seems to have a grounding issue too, the main out isn’t as noisy as the 8 outputs, and it seems worse when the usb cable is connected.
It’s pretty bad actually, especially when adding compression or pushing the output levels.
I generally dont have noise issues, but there was noise when dynamic filters where on, and i also get noise when connecting from patchbay to s2400 inputs (but not when connecting from other gear to the inputs).
In my case I suspect grounding issues but am not sure. I tried different cabling set-ups with alligator clips to test but couldnt solve the issue. Also lifted ground with nil change.
In my case, the issue was actually a grounding issue stemming from connecting s2400 outputs to balanced inputs. It was likely exacerbated by the connecting inputs from console back to s2400, which was more obvious.
To fix issue, i rewired cables as following:
-Hot/positive (s2400 end) to hot/positive (console end).
-ground pin (s2400 end) to cold/negative (console end).
Edit: ring to sleeve on sample inputs to s2400 when
coming from balanced gear also minimises ground hum.
Nice and quiet now. I would suspect any similar issues with other people to potentially be connection issues. Connecting to mic inputs as oppossed to line inputs is also another potential issue.
Hey guys thanks for the updates, I have traced the noise problems I was having, it 100% usb related. I work 99% of the time analog but haveing the usb plugged in was causing all sorts of noise floor issues with the analog outputs. Since then Iv just decided to never use the usb ports and have had zero issues. There is def a grounding issues with the usb ports. I wish I could keep usb plugged in 24 7 but I just attached when needed and usb audio mode has no noise (audio over usb) it’s just the analog outputs when usb is connected.
So glad you solved this and yes USB is a REALLY COMMON way to introduce noise into a setup.
without trying to sound like a tit.
it is not the S2400, it’s whatever you are plugging it into.
it could even be your cable.
the USB subsystem on the S2400 has never changed throughout production.
make sure your computer has a good ground, if it’s a laptop, does the noise stop when you run it off battery?
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