Audioinput example: [5.15 -> 6.3] a lot of noise for the volume level

In the 6.3 "audioinput" example the behavior has changed significantly from what it was in 5.15. In 5.15 the bar depicting audio level seems quite consistent with the amount of noise while in 6.3 the same bar is constantly jumping somewhere between 0-100 even in a quiet room.

It seems like every other call to AudioInfo::calculateLevel consistently returns significantly higher values than the value before it without a clear reason.

Steps to reproduce the problem:

1. Run the example