# Noise during boot up?

**URL:** <https://squarp.community/t/noise-during-boot-up/1452>\
**Category:** Hermod\
**Created:** [August 12, 2018, 7:06pm UTC](https://squarp.community/t/noise-during-boot-up/1452 "2018-08-12T19:06:13Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![waggles](https://squarp.community/user_avatar/squarp.community/waggles/32/611_2.png) [@waggles](https://squarp.community/u/waggles)\
**Post date:** [August 12, 2018, 7:06pm UTC](https://squarp.community/t/noise-during-boot-up/1452/1 "2018-08-12T19:06:13Z")

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Just got my Hermod and have only had a few minutes with it so far, but one thing I’ve noticed is that I’ll get a few seconds of buzzing out of my speakers during the boot up, even if nothing is patched to the output (meaning it’s something happening with the ground, right?). I just was wondering if this is happening to anyone else or if it’s just me. Using a synthrotek case power mini drawing far under the specs. I’ll investigate more tonight to see if any voltage is present, etc. If this is normal I can live with it, but I’m a bit nervous about other modules getting strained via their grounds…

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**Author:** ![waggles](https://squarp.community/user_avatar/squarp.community/waggles/32/611_2.png) [@waggles](https://squarp.community/u/waggles)\
**Post date:** [August 14, 2018, 10:44am UTC](https://squarp.community/t/noise-during-boot-up/1452/2 "2018-08-14T10:44:52Z")

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I figured it out- I have a Trogotronic power filtering cable connecting the busboard the Hermod was plugged into and that seems to be causing the delayed warming-up sound. Removing it and connecting the busboards without filtering shortens the noise so that it’s barely noticeable (think of the sound in a set of speakers when an amp is turned on). I think maybe it’s caused by the larger caps on the filter taking another second to fill up? Not really sure, but issue resolved.