Microphone input is freezing/having a long delay in Ultra Star Deluxe

[kalpana]

Hi there,

I posted this almost a year ago at the usdx github projcet and got redirected to these boards. I hope somebody can help.

In the mean time I upgraded to Ubuntu 20.04.5 LTS.

Actual behaviour

Singing into the microphone is registered by the program with a big delay. You can see the visualization of the sung pitch freezes or updates only every few seconds (in the game itself, when you sing a song or also in the Options/Record screen).

This also influences the score of your singing, as the program counts the frozen pitch. So this isn't only a visual issue.
Expected behaviour

There should be no freeze/delay.
Steps to reproduce

Open the ultrastardx program
Start the game by choosing a song or open Tools/Options/Record
Sing/Speak into the microphone
Notice the frozen pitch visualization at the singing screen or the Assigned Player option.

Details

Provide some additional information:

USDX version: 2020 4.1 dev
Operating System + version: Ubuntu 20.04.5 LTS
I noticed this bug happened only since I updated my operating system (from Ubuntu 18) to Ubuntu 20.04.2 LTS at the beginning of this year. The problem still persists with 20.04.5 LTS.