Blackmagic Forum

Don't know if this is just a specific problem for me, but my speakers crackle when rendering in resolve. It's like pink noise whenever CUDA gets activated and the GPUs are processing. Anybody else get this? Anybody know how to fix it?

Mac Pro - Dual GTX 690 - Intensity Pro - Dell UP2414Q

(give more food to those hamsters....)

Im speculating.. when in playback or render the same GPU process occurs but when in Render we don't limit the speed to the timeline rate. Could it be that the power supply can't deal with both GPUs working so hard and thats feeding into the audio circuit? Try setting the render speed to 20% and see if it still happens.

waltervolpatto wrote:(give more food to those hamsters....)

LOOOOOLLLL

Hamsters yes.
I've trouble shot and I'm sure it's not explicitly Resolve, but CUDA in general. The hamsters start running when I'm running Octane too. Then I tried an old game I had and it made noise as well. So I'm guessing it's a grounding issue.

I have a separate power supply running the 2 cards. I wonder if there is some feedback running back through the wires and affecting the speakers somehow. Prepping to run speakers of different circuit.

Michael McReynolds wrote:Hamsters yes.
I've trouble shot and I'm sure it's not explicitly Resolve, but CUDA in general. The hamsters start running when I'm running Octane too. Then I tried an old game I had and it made noise as well. So I'm guessing it's a grounding issue.

I have a separate power supply running the 2 cards. I wonder if there is some feedback running back through the wires and affecting the speakers somehow. Prepping to run speakers of different circuit.

Is it like a Humm? Can you check if all the grounds are well connected inside the machine/power supply and such?

I had a crazy sound coming out of a room when the two power supply where good but the ground had a differential that was creeping in one of the amplifier creating a return hiss/hhumm...

(or it just the hamster...)

It's not a hum. It's literally like static/poppy white noise, but in synchronicity with the graphics processing. Having done more research I've found that even if I move, say, my browser window around real fast, it will make real quiet static. The more intense graphics work the louder the speakers. When I render really heavy stuff through Octane (so heavy the GPU fans kick on, which they never do in Resolve) it sounds like static bullets being fired. So weird.

I know this thread is a decade old, but I found it in my quest to solve the same problem: any time I'd render in Resolve my speakers would buzz with pink/white noise. I marked this thread and continued on my quest until I found my answer: I needed balanced audio cables to the speakers.

Now, I don't know if OP was using external speakers and if so, how they were hooked up, but to anyone who finds this thread in the future, I wanted to post a possible resolution.

My setup:

- Windows 11, 32GB RAM
- Ryzen 5700G (not using onboard graphics)
- NVIDIA GeForce RTX 3060 TI
- Focusrite Scarlett 18i20 connected via USB
- Monster Power Pro 9000 PowerCenter
- Seasonic Focus GM-550, 550W 80+ Gold Power supply
- KRK Rokit monitors


The monitors were connected via 15' unbalanced 1/4" TS cables. I would notice a light hum/buzz at various times, not just when using Resolve, and before my tinnitus was bad, I could hear them start to hum when I turned my monitor on. I swapped the cable out for 15' Balanced TRS 1/4" cables and all noise disappeared.

To understand why, read up on the difference between balanced and unbalanced cables.