Recent content by John Mulcahy

Java applications are abstracted from the hardware and cannot directly control it. On Windows the WASAPI exclusive and ASIO drivers use 3rd party Java libraries that run native code to enable that access. I don't have an equivalent for macOS.

Thanks, I have fixed it for the next build.

Under macOS the device runs at the rate configured for it in Audio Midi Setup and if REW is asking for something different the OS will resample.

Uncorrelated noise has been on my todo list for a long time, I'll add it in the next build.

Of course, REW uses the impulse response to generate the response, the IR itself is on another graph:

The figures shown are for the position of the graph cursor.

You can adjust the graph range by clicking the "Limits" button at the top right of the graph or moving your mouse over the ends of the axes and using the scroll wheel.

Display resolution doesn't matter too much as long as the effective resolution (native/scale factor) isn't too low (preferably not less than 1280H), which shouldn't be an issue with a 17" screen. REW can scale fonts to suit:

That's the frequency response of the IR. I have added support for the emulator files as well, but REW will ask for the sample rate when importing them since that cannot be determined from the file.

A distortion graph image doesn't convey much if it doesn't show any of the distortion data :). Below 80 Hz or so the result is in the noise floor, so noise will register as distortion there and could trigger a warning.

Check the buffer settings in the REW soundcard preferences, if they are very large the latency that causes can mean the end of the sweep is missed. 16k buffers should be sufficient. If reducing buffer size doesn't help use the acoustic timing reference option to make sure the replay latency...

The shelf Q is 0.7071. You can see that in REW by going into the filters and changing the type from LS to LSQ.

The emulator output isn't much use, it is just a list of numbers so could be anything. The impulse file is OK though, I have added support for that for the next build:

Strange. Since you are using a UMIK-1 you shouldn't really use a rectangular window since it is unlikely the replay and receive clocks are identical, though it shouldn't make much difference at those frequencies and FFT lengths. Worth trying with BH-7 though.

Look at the distortion graph to see what that shows.