# \#2700 twin t drums **URL:** \ **Category:** KOSMO MODULES\ **Created:** [April 5, 2021, 2:37pm UTC](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316 "2021-04-05T14:37:51Z")\ **Posts on this page:** 1\ **Showing post:** 140
**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\ **Post date:** [December 14, 2023, 10:36pm UTC](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316/140 "2023-12-14T22:36:37Z")
Could be picking up crosstalk from something else. That seems to be a common thing with these kinds of noise circuits; I had a kind of similar problem recently: [Noise source circuits - #7 by analogoutput](https://lookmumnocomputer.discourse.group/t/noise-source-circuits/6656/7) complete with the now-you-hear-it, now-you-don’t. No guarantees but if the problem recurs you might consider filtering the +12 V rail by replacing R30 with two 470 kΩ in series and then adding a 1 µF capacitor from their junction to ground. I don’t _think_ that would do any harm (certainly nothing permanent, just unsolder the cap if you don’t like it) and might be a fix? --- _[View the full topic](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316)._