Troubles with live flash using

[agent_kith]

Good: web interface from remote laptop working.
Not possible in bios to put flash as primary boot, so had to launch its booting from bios manually and quickly turn off keyboard/monitor/mouse ))
Unfortunately can not play some music from live flash to check clicks issue I had with dac,  as no music library is available on image flash.
Should I install OS to play some music or...?

For testing, you can:

1. connect another USB HDD, or
   
2. copy one or two files over to the music share folder
   
3. Mount a share folder from a NAS
   
4. Install Snakeoil on another USB stick (but remember to remove the LiveCD stick after installation)
   

Live CD is meant for a quick evaluation. To use it properly as a OS, yes you have to install it.

 

Bad: dac connected to PC start whistling like ultra short radio waves. After some times amplitude of whistles is decreasing untill total silence.  The same sound was if I plug in DAC at loading my normal OS.  But it was not the case when dac was plugged after booting my OS and HQPlayer started.

This could likely point to a ground loop noise issue. If you have more than 1 equipment that's grounded, you will hear noises like that.

The SnakeoilOS LiveCD will boot up the graphical environment, and it is likely the graphics card is the culprit of this noise. The graphical environment will not start once the OS is installed. All graphical things from there on is run in a virtal desktop (VNC) environment. Runnig the OS in text mode will reduce the amplitude of high pitch noises, but not rid it totally.

To check, go through every equipment that's in your audio system, and check if it has an earth pin or not. If you have more than 1 equipment with an earth pin, then there is a ground loop problem.