# DSD Dac Sr. Tiny little sound when turned on **URL:** \ **Category:** DACs\ **Created:** [October 18, 2019, 8:11am UTC](https://forum.psaudio.com/t/dsd-dac-sr-tiny-little-sound-when-turned-on/13520 "2019-10-18T08:11:42Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![joaopmts](https://avatars.discourse-cdn.com/v4/letter/j/b77776/32.png) [@joaopmts](https://forum.psaudio.com/u/joaopmts)\ **Post date:** [October 18, 2019, 8:11am UTC](https://forum.psaudio.com/t/dsd-dac-sr-tiny-little-sound-when-turned-on/13520/1 "2019-10-18T08:11:42Z")
Does your DSD DAC makes a little sound (it’s very little) right after you turn on the main switch ? I have never listen to it, so just cheking. And its not the relays sound few seconds before its ready. Its 1 sec after you turn on Thanks Joao ---
**Author:** ![iron](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/iron/32/31006_2.png) [@iron](https://forum.psaudio.com/u/iron)\ **Post date:** [October 18, 2019, 10:21am UTC](https://forum.psaudio.com/t/dsd-dac-sr-tiny-little-sound-when-turned-on/13520/2 "2019-10-18T10:21:43Z")
my (2) DSD sr. are quiet on turn and during play…i have high efficiency horns, so any problems would be amplified… ---
**Author:** ![joaopmts](https://avatars.discourse-cdn.com/v4/letter/j/b77776/32.png) [@joaopmts](https://forum.psaudio.com/u/joaopmts)\ **Post date:** [October 18, 2019, 1:32pm UTC](https://forum.psaudio.com/t/dsd-dac-sr-tiny-little-sound-when-turned-on/13520/3 "2019-10-18T13:32:46Z")
The poppin is a “real” one. Not on the signal. I mean is made by some component on the DAC ---
**Author:** ![brett66](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/brett66/32/92201_2.png) [@brett66](https://forum.psaudio.com/u/brett66)\ **Post date:** [October 18, 2019, 2:36pm UTC](https://forum.psaudio.com/t/dsd-dac-sr-tiny-little-sound-when-turned-on/13520/4 "2019-10-18T14:36:38Z")
I suspect you’re hearing the relays enabling the outputs. They (or something) make a bit of click as they engage. ---
**Author:** ![jamesh](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/jamesh/32/3871_2.png) [@jamesh](https://forum.psaudio.com/u/jamesh)\ **Post date:** [October 18, 2019, 2:59pm UTC](https://forum.psaudio.com/t/dsd-dac-sr-tiny-little-sound-when-turned-on/13520/5 "2019-10-18T14:59:59Z")
Yes, @brett66 is right on point. There are a number of relay clicks as it mutes and un-mutes the outputs. ---
**Author:** ![tedsmith](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/tedsmith/32/96626_2.png) [@tedsmith](https://forum.psaudio.com/u/tedsmith)\ **Post date:** [October 18, 2019, 4:36pm UTC](https://forum.psaudio.com/t/dsd-dac-sr-tiny-little-sound-when-turned-on/13520/6 "2019-10-18T16:36:44Z")
And in particular the attenuator relays are bi stable, meaning they remember their position when the power is off. When the system is booted they are all driven to the position that the software remembered from before the last power off, just in case. That’s a qualitatively different click than the mute relay. ---
**Author:** ![joaopmts](https://avatars.discourse-cdn.com/v4/letter/j/b77776/32.png) [@joaopmts](https://forum.psaudio.com/u/joaopmts)\ **Post date:** [October 18, 2019, 4:58pm UTC](https://forum.psaudio.com/t/dsd-dac-sr-tiny-little-sound-when-turned-on/13520/7 "2019-10-18T16:58:36Z")
Thank you guys. I never realize this click. Now I’m fine ---
**Author:** ![timm](https://avatars.discourse-cdn.com/v4/letter/t/8e8cbc/32.png) [@timm](https://forum.psaudio.com/u/timm)\ **Post date:** [October 18, 2019, 9:44pm UTC](https://forum.psaudio.com/t/dsd-dac-sr-tiny-little-sound-when-turned-on/13520/8 "2019-10-18T21:44:52Z")
I rarely turn mine off by the switch. Usually always standby. I used to be a system admin and i treat the ds like a Unix box. To just turn off gives me the willies. 🙂