Another few updates. It has been very tricky to move through impulse responses at high zoom levels, so I have tried to tackle that by adding an impulse response navigator. It sits below the impulse graph, replacing the scroll bar, and shows the entire response with the currently displayed portion highlighted. The highlighted region can be dragged to reposition the view, with smooth scrolling even at very high zoom. Clicking anywhere in the navigator view centres the displayed portion on the click. If the mouse wheel is used while the mouse is over the navigator the graph will be zoomed along its time axis, centred on the time axis position of the mouse pointer in the main graph.
View attachment 56978
There is now an option to "Fill silence with dither" on the Measure dialog and the Measurement sweep panel of the signal generator. If this is selected the generator will replace silent parts of the sweep with 16-bit dither. This option is provided to try and counter aggressive output muting which some DACs exhibit when one of their input channels does not have any signal. There is some penalty in the impulse response noise level, though it is far below the noise floor for acoustic measurements, only potentially having an impact when measuring electronics. Nonetheless the option should only be selected if required to counter device behaviour.
There are now controls in the room simulator to set the SPL at the top and bottom of the response graph.