# Directstream Mk 2 observations **URL:** \ **Category:** DACs\ **Created:** [December 22, 2022, 7:13pm UTC](https://forum.psaudio.com/t/directstream-mk-2-observations/31566 "2022-12-22T19:13:50Z")\ **Posts on this page:** 1\ **Showing post:** 2583
**Author:** ![fvector750](https://avatars.discourse-cdn.com/v4/letter/f/d6d6ee/32.png) [@fvector750](https://forum.psaudio.com/u/fvector750)\ **Post date:** [August 18, 2023, 5:17am UTC](https://forum.psaudio.com/t/directstream-mk-2-observations/31566/2583 "2023-08-18T05:17:47Z")
What you’re running into is probably within the range of expected issues you might see if auto power is enabled and is unfortunately kind of the nature of the way USB is implemented in Mk2. Rather than just disappear, Ted explained that when the active USB connection is switched off, the computer or the streamer will start seeing the passive bootstrap of the USB chip as a device. To the streamer, it may appear as if you had plugged it into a different device. On some devices, the amount of churn this causes is sometimes more trouble than it’s worth. > [@Firmware updates and fixes for the new Directstream MK2](https://forum.psaudio.com/t/firmware-updates-and-fixes-for-the-new-directstream-mk2/32755/399): > > To potentially avoid a little confusion with the new Mk II software when using it’s automatic power off (on) of the I2S and USB inputs: > > Note that if an active USB input is powered off your PC will see the USB device go away and you might see a new USB device show up which is the bootstrap USB device for the USB chip in the Mk II. Then when the USB port is powered back on the PC will see the Mk II USB again. When a USB audio device comes and goes there can be a lot of rearanging of input and output audio connections. > > Most people who plan on using USB now and then should keep the USB powered up always. > > Those who don’t use USB ever can set the USB to auto power up and if they then select USB as an input it will power up, but otherwise it will be quiet. --- _[View the full topic](https://forum.psaudio.com/t/directstream-mk-2-observations/31566)._