# Noisy Delay problem **URL:** \ **Category:** DIY STUFF\ **Created:** [February 29, 2024, 11:48am UTC](https://lookmumnocomputer.discourse.group/t/noisy-delay-problem/7038 "2024-02-29T11:48:42Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![VincentEklund](https://avatars.discourse-cdn.com/v4/letter/v/3ec8ea/32.png) [@VincentEklund](https://lookmumnocomputer.discourse.group/u/VincentEklund)\ **Post date:** [February 29, 2024, 11:48am UTC](https://lookmumnocomputer.discourse.group/t/noisy-delay-problem/7038/1 "2024-02-29T11:48:42Z")
Hey everyone! I have just built the LMNC super simple delay, but I am finding it being a bit noisy, I think It is picking up noise from the power supply/other modules… would it help to put caps from +12v to gnd and -12v and gnd? If possible? Which value should they be? All the best! Vincent ---
**Author:** ![Bpbby](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/bpbby/32/15259_2.png) [@Bpbby](https://lookmumnocomputer.discourse.group/u/Bpbby)\ **Post date:** [February 29, 2024, 1:34pm UTC](https://lookmumnocomputer.discourse.group/t/noisy-delay-problem/7038/2 "2024-02-29T13:34:05Z")
Is it noisy all the time or mostly at high feedback level ? The PT2399 chip is quite lowfi. I have 3 PT2399 delay modules and they make quite a bit of white noise. I use a low pass filter on the output, helps quite a bit. ---
**Author:** ![VincentEklund](https://avatars.discourse-cdn.com/v4/letter/v/3ec8ea/32.png) [@VincentEklund](https://lookmumnocomputer.discourse.group/u/VincentEklund)\ **Post date:** [February 29, 2024, 2:47pm UTC](https://lookmumnocomputer.discourse.group/t/noisy-delay-problem/7038/3 "2024-02-29T14:47:59Z")
Hmm, it seems to be as you say, it doesn’t sound noisy when I’ve got nothing plugged in or use a bit shorter delay… I sat down for a jam and it sounds real funky, in a sort of good way, it distorts the signal a bit and I can get it to sort of feedback internally… It wasn’t originally what I had hoped for but I think it’s quite cool in this way aswell… How do you have the low-pass set up on your module? Is it fixed or is it with a pot? ---
**Author:** ![Bpbby](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/bpbby/32/15259_2.png) [@Bpbby](https://lookmumnocomputer.discourse.group/u/Bpbby)\ **Post date:** [February 29, 2024, 5:56pm UTC](https://lookmumnocomputer.discourse.group/t/noisy-delay-problem/7038/4 "2024-02-29T17:56:47Z")
Sorry, I meant into a VCF module. But yes I guess you can add a very simple Sallen key low pass filter. And I aslo agree, it sounds nice but very different from what one could excpect from a digitial delay. ---
**Author:** ![zorch](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/zorch/32/5586_2.png) [@zorch](https://lookmumnocomputer.discourse.group/u/zorch)\ **Post date:** [March 1, 2024, 3:15am UTC](https://lookmumnocomputer.discourse.group/t/noisy-delay-problem/7038/5 "2024-03-01T03:15:52Z")
Just out of curiosity, what LED’s are you using? I am using different ones on each stage and I feel like this might have an effect. ---
**Author:** ![Bpbby](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/bpbby/32/15259_2.png) [@Bpbby](https://lookmumnocomputer.discourse.group/u/Bpbby)\ **Post date:** [March 1, 2024, 2:28pm UTC](https://lookmumnocomputer.discourse.group/t/noisy-delay-problem/7038/6 "2024-03-01T14:28:32Z")
I assume that you are referring to the triple splashback delay LEDs. I do have different ones yes, cheap ones. But I don’t think they are causing much noise. I would lean towards the fact that there is a big random factor from chip to chip. I always wanted to try different PT2399 batch on the same delay and see how much difference it makes.