REW Beta Release REW API beta releases

majorwong · Oct 22, 2024

Hi,

John Mulcahy

4 more suggestions for you to add in REW:
1.Would you think of adding an unit of exportation of group delay,which can be imported in other simulation tools?
2.Measure the SPL and Imp,adding a sweep signal range from 20kHz~20Hz(from high to low) might increase stability of the test result just like soundcheck.To some extent it may reduce the 'hush' sound annoying during the test.
3.A brown theme like sunset should be considered to put into TO-DO-LIST.
4.Volume or adding mass method should show the optimal fs shift percentage(20％~50％) after 2 curves overlay,which can get rid of the manual calculation.

Thanks for your reply.

newbiejl · Oct 23, 2024

Hi, I couldn't figure out the body (REST API) to set "Mic cal files" where "separateCalFileForEachInput" =true.
Have anyone tried this?
Thanks!

Here's my PUT/audio/input-cal
{
"currentInputSelection": "Microphone (E.A.R.S Gain: 24dB ) MICROPHONE (Master Volume)",
"separateCalFileForEachInput": true,
"inputDeviceIsCWeighted": false,
"calDataAllInputs": {},
"perInputCalData": {
"L":{
"calFilePath": "C:\\Users\\xxxx\\Downloads\\L_RAW_xxxx.txt"
},
"R":{
"calFilePath": "C:\\Users\\xxxx\\Downloads\\R_RAW_xxxx.txt"
}
}
}

======================================================================
But while setting up manually on the REW interface, GET input-cal will show:
{
"currentInputSelection": "Microphone (E.A.R.S Gain: 24dB ) MICROPHONE (Master Volume)",
"separateCalFileForEachInput": true,
"inputDeviceIsCWeighted": false,
"perInputCalData": {
"L": {
"calFilePath": "C:\\Users\\xxxx\\Downloads\\L_RAW_xxxx.txt",
"dBFSAt94dBSPL": -20.38971
},
"R": {
"calFilePath": "C:\\Users\\xxxx\\Downloads\\R_RAW_xxxx.txt",
"dBFSAt94dBSPL": -20.38971
}
}
}

Seems like the current API doesn't support "separateCalFileForEachInput": true
Any thoughts?

John Mulcahy · Oct 23, 2024

newbiejl said:
Seems like the current API doesn't support "separateCalFileForEachInput": true

It is supported but there is a bug which is preventing the paths being saved properly (unless the files have a sensitivitydBFS entry). I have fixed it for the next build. I also noticed the fullScaleSineVrms field was mislabelled fullScalSineVrms, that has also been fixed in the next build.

John Mulcahy · Oct 23, 2024

majorwong said:
Would you think of adding an unit of exportation of group delay,which can be imported in other simulation tools?

That wouldn't be a unit, it would need a separate export for the group delay graph. I'll add it to the todo list.

majorwong said:
Measure the SPL and Imp,adding a sweep signal range from 20kHz~20Hz(from high to low) might increase stability of the test result

Why would a reversed sweep increase test result stability? Reversing the sweep would mean harmonic distortion could no longer be extracted.

serko70 · Oct 23, 2024

John Mulcahy said:
Reversing the sweep would mean harmonic distortion could no longer be extracted

But it would be more inline with the impulse graph

newbiejl · Oct 23, 2024

John Mulcahy said:
It is supported but there is a bug which is preventing the paths being saved properly (unless the files have a sensitivitydBFS entry). I have fixed it for the next build. I also noticed the fullScaleSineVrms field was mislabelled fullScalSineVrms, that has also been fixed in the next build.

Thanks! Just to double confirm, can you check my assumption below is correct? API document doesn't tell much about this

John Mulcahy · Oct 24, 2024

Yes, that's correct. You can omit structures that aren't relevant.

John Mulcahy · Oct 24, 2024

Builds updated today (beta 58) with these changes:

Added: Show busy indicator while updating FSAF signal
Added: Ctrl+click can be used to bring up the right click menus on macOS
Fixed: Filter text export for LSQ and HSQ shelf filters had incorrect Q values
Fixed: Selecting dBr as the Y axis on the SPL & Phase graph for a saved RTA measurement was not handled correctly
Fixed: FSAF measurement could give a "file too short" warning on changing the signal duration when not using a file
Fixed: API InputCalData structure fullScaleSineVrms field was mislabelled fullScalSineVrms
Fixed: API per-input cal file paths posted to /audio/input-cal were not saved properly in the cal data

Chroma · Oct 24, 2024

Moving measurements around the screen with mouse right-click don't work anymore on Beta 58, this is on Mac.

Mike0815 · Oct 25, 2024

Hello John,

I'm measuring with pro version and 8 microphones.
Could you add an option to automatically cross correlate to the first mic and then to vector average the correlated? (immediately after measuring) Currently the options allow to average without cross correlating things first I think.
This would speed up things considerably here.

Thanks
Michael

John Mulcahy · Oct 25, 2024

Chroma said:
Moving measurements around the screen with mouse right-click don't work anymore on Beta 58, this is on Mac.

I have rebuilt the macOS installer to fix that, if you download again it should be OK.

Chroma · Oct 25, 2024

John Mulcahy said:
I have rebuilt the macOS installer to fix that, if you download again it should be OK.

Thanks works again...

John Mulcahy · Oct 25, 2024

Mike0815 said:
Could you add an option to automatically cross correlate to the first mic and then to vector average the correlated?

I can add options for that, with a couple of caveats:

It will only work when the Save inputs individually option is selected
The vector average will have uniform weighting for all inputs, regardless of the weightings chosen for the rms average

dcibel · Oct 26, 2024

Minor bug report. In the measurement setup, when entering the number of measurement repeats, if you don't hit the Enter key in the box and just click off the drop-down, the number of repeats isn't updated. Selecting the drop down will still show the value entered, and the number of repeats is then updated when you click in the box.

This has caught me a few times, that I enter a value and click off the box and don't notice that it hasn't been changed.

John Mulcahy · Oct 26, 2024

dcibel said:
In the measurement setup, when entering the number of measurement repeats, if you don't hit the Enter key in the box and just click off the drop-down, the number of repeats isn't updated.

Is that on Linux? I can't reproduce that behaviour on Windows.

dcibel · Oct 26, 2024

Yes, on Linux. I have a similar behaviour with the "add a number to the name" context menu.

John Mulcahy · Oct 26, 2024

MacOS has the same behaviour, I have added a fix in the next build.

JoinUs · Oct 27, 2024

Is it impossible to make each measurement's thumbnail selected in the SPL tab as it is in the current beta?
Sometimes I do it without a keyboard, but at the moment, I think it only works with alt + keyboard direction keys.

Also,
Does FDW and MTW have to be smoothed unconditionally? Can't I disable this?
I set after 1k to 500ms in MTW, but when export IR and import back, over 1khz is changed.

John Mulcahy · Oct 28, 2024

JoinUs said:
Is it impossible to make each measurement's thumbnail selected in the SPL tab as it is in the current beta?

I don't understand that question.

JoinUs said:
Does FDW and MTW have to be smoothed unconditionally? Can't I disable this?

FDW and MTW results are log spaced at 96 PPO and so have inherent smoothing of 1/48 octave.

Breeman · Oct 28, 2024

Hi John,

I might doing this incorrectly but when I create a electrical filter in the EQ screen and generate measurement from it, the generated measurement does not have the phase component. See below.

I was hoping that the generated measurement would have a phase component like this one.

Below is the speaker measurement before and after applying the filter (used the arithmetic A*B function).

The phase response of the speaker is not modified "as it should under normal circumstances" when such a filter is applied.

I was expecting something similar to below with the red graph showing the original phase response and the green one representing the phase repsone with the filtter applied. Am I following the correct method in using electrical filters or is the design intent to produce filters without phase response from within EQ screen? It would be great if the EQ screen can have an option to include phase in the generated response.

John Mulcahy · Oct 28, 2024

Did you use Generate measurement from filters, which will produce an impulse response from the current filter settings, or Generate measurement from target shape, which only produces a magnitude response?

Breeman · Oct 28, 2024

Hmm, just realised that when I use the "generate minimum phase" option for the electric filter under the SPL & Phase and use the same arithmetic function, I get the correct phase response. It would still be prefereable in EQ tab, to generate filters with phase response to avoid the extra step.

John Mulcahy · Oct 28, 2024

See above, use Generate measurement from filters.

Breeman · Oct 28, 2024

John Mulcahy said:
Did you use Generate measurement from filters, which will produce an impulse response from the current filter settings, or Generate measurement from target shape, which only produces a magnitude response?

No, I just used the Target Settings to simulate a filter I want to apply to the speaker response, not necessarily to equalise the speaker's response or generate measurement from filters which in this use case, would be flat. It is the generate measurement from target shape that I used but as you said, it only produces a magnitude response.

Breeman · Oct 28, 2024

John Mulcahy said:
See above, use Generate measurement from filters.

Using that option produces a flat line. I am trying to use EQ more as a crossover simulator "without equalising/matching the speaker response against the target curve using PK filters for an example" to better understand its behavior.

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