Lunar Lander has two sources for noise.
The noise from the Delay module when you increase the BBD, and the other noise is the floor noise level of the “machine”.
The GUI now shows clearly the noise section, with a screw labeled “noise” which only affects the BBD noise.
The other is a switch to turn off floor noise, which was averaging -95 dB in previous versions but now lowered to -110dB.
v2.1.1 includes an on/off switch to turn on or off the Noise Floor. By default, the new version will have Noise Floor ON for full compatibility with previous versions.