# Question on U1 and U1 Mini

**URL:** <https://community.roonlabs.com/t/question-on-u1-and-u1-mini/96203>\
**Category:** Lumin\
**Created:** [February 28, 2020, 4:38pm UTC](https://community.roonlabs.com/t/question-on-u1-and-u1-mini/96203 "2020-02-28T16:38:37Z")\
**Posts on this page:** 1\
**Showing post:** 14

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**Author:** ![fernand\_lambert](https://community.roonlabs.com/user_avatar/community.roonlabs.com/fernand_lambert/32/39644_2.png) [@fernand\_lambert](https://community.roonlabs.com/u/fernand_lambert)\
**Post date:** [July 9, 2020, 1:42pm UTC](https://community.roonlabs.com/t/question-on-u1-and-u1-mini/96203/14 "2020-07-09T13:42:20Z")

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A question for you,

1. I found when playing Hi-Res files that when the volume of my dac/preamp is low I hear a lot of noise to even distortion, now I have been able to solve this by setting the Simple Rate Conversion to Enable in Roon, I find this strange.

2. Is it disadvantageous to have the Lumin U1mine connected to the dac/preamp with both AES/ EBU and USB or should I not do this?

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_[View the full topic](https://community.roonlabs.com/t/question-on-u1-and-u1-mini/96203)._