# DIY Raspberry Pi HiFi

**URL:** <https://forum.headphones.com/t/diy-raspberry-pi-hifi/1724>\
**Category:** DIY Audio & Modifications\
**Tags:** raspberry-pi\
**Created:** [June 19, 2018, 2:27am UTC](https://forum.headphones.com/t/diy-raspberry-pi-hifi/1724 "2018-06-19T02:27:57Z")\
**Posts on this page:** 1\
**Showing post:** 18

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**Author:** ![pennstac](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.headphones.com/pennstac/32/381_2.png) [@pennstac](https://forum.headphones.com/u/pennstac)\
**Post date:** [November 21, 2020, 12:42am UTC](https://forum.headphones.com/t/diy-raspberry-pi-hifi/1724/18 "2020-11-21T00:42:02Z")

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I’m asking here because some of the audiophile power supplies I’ve been “researching” on the net also appear in Raspberry Pi contexts. I’m hoping that someone who has a bit more DIY experience might shed some light on the perplexing hum I’ve experienced when I add charging to an iPad or iPhone while listening to my Audeze LCDi3 and then (gasp) touching them.

> [@iPad Hum](https://forum.headphones.com/t/ipad-hum/9112/24):
>
> Tested house wiring long ago. It’s OK, correct for what it was. It nags at me too. Dead silence using a battery charge. That must mean that it is some variation in current that is causing the hum. Which should mean that smoothing out variation in current should cure it. I am reminded of the “heavier than a duck” logic from Monty Python. Maybe some of the more advanced DIY people would have an opinion.

I’m trying to figure out if I should blow $50-$150 on a better USB charger…

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