REW Beta Release REW API beta releases

A

achugh

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Jan 16, 2023
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Preamp, Processor or Receiver
Pioneer Elite SC-37
Universal / Blu-ray / CD Player
Panasonic BP-UB9000P1K
Front Speakers
Klipsch RF7 II
Center Channel Speaker
Klipsch RC64 II
Surround Speakers
Klipsch RB81 II
Surround Back Speakers
KlipschRB81 II
Subwoofers
Tweak City Audio CS18.2 (Dual Subs)
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LG OLED77G2PUA
Other Equipment
miniDSP 2x4HD, UMIK-1
serko70 said:
You are measuring a subwoofer full range and REW detects very low output beyond 250Hz relative to noise floor and pops a warning. You can ignore it for subs or measure them with a limited frequency range.
Click to expand...
Thank you for confirming my suspicion. I used to work with limited range but after watching your Youtube channel, I started doing full range for subwoofer sweeps. Since REW already knows that this is a subwoofer sweep as the channel selected is LFE, it will be great if REW applies some smart logic to check for distortion via some preference where one can provide the LFE range for distortion check to avoid this dialog box from showing up unless there is really a distortion to worry about. For now, I will continue to ignore this message for full range subwoofer sweeps.

This distortion graph is showing FUNDAMENTAL line plot as a straight line at 100 mark. In some other threads here I have seen this line to be drawn like other harmonic lines. I do not know if this is something I need to worry about or it is also because of the full sweeps on the LFE channel that I need to ignore. Does anyone knows why this 1st harmonic (Fundamental) line is a straight line at 100 value?
 
John Mulcahy

John Mulcahy

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achugh said:
Does anyone knows why this 1st harmonic (Fundamental) line is a straight line at 100 value?
Click to expand...
Because you are plotting the results as a percentage of the fundamental. If you change the Y axis type to SPL, for example, you can see absolute rather than relative levels.
 
John Mulcahy

John Mulcahy

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Builds updated today (beta 60) with these changes:
  • Added: API /alignment-tool/remove-delay endpoint to control the option to remove time delay
  • Changed: Thiele-Small parameters "Write parameters to file" includes simplified model parameters
  • Changed: Cross corr align improved for measurements with strong reflections
  • Fixed: The alignment tool option to remove delay from the first measurement could be applied after using the alignment tool via the API
  • Fixed: On the Impulse graph dragging the time axis during Offset t=0 was not working
  • Fixed: STI panel was using internal test data
 
J

JoinUs

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Jan 6, 2023
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Hey John, Is it possible for REW to do this?


1731986959828.png



If there's a response like this


1731987026931.png



This way, it connects to the middle of the dip and the peak.
Smoothing can make this partly smooth, but I'm wondering if it's possible as if I drew a dotted line.

I can open the csv file in Excel and change the number from the desired frequency to the frequency to make it go on smoothly like that, but I was wondering if it would be possible in REW as well.


Making it soft with Python was helped by GPT, but I thought it would be better if these features were added to REW.
Yellow Original
Green Connect the calculated midpoints peak and dip

1731988067889.png




1731988137197.png

1731988149842.png

1731988162056.png


1/1, 1/3, PSY smoothing, etc. It's definitely different from what I intended.
I don't understand the exact action because it was made by GPT, but I also attached the py file.
 
Last edited:
John Mulcahy

John Mulcahy

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No, it isn't possible for REW to do that. You could experiment with the effect of varying the right hand window on the Impulse graph, drag the "R" marker at the top of the graph.
 
J

JoinUs

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John Mulcahy said:
No, it isn't possible for REW to do that. You could experiment with the effect of varying the right hand window on the Impulse graph, drag the "R" marker at the top of the graph.
Click to expand...
It was a bit of a different story from gating, but I see.

1732189112242.png


Another suggestion (or question), is it possible to impulse the response from room simulation?
Currently, when I try to export it, I don't have Data. Of course, it's not an impulse, so I can't.

1732189245191.png


But if you generate mp and ep from room simulation and multiply it again, you get the same impulse as room simulation.
It would be nice to have this option (MP+EP with IR) for room simulation export as well.


1732193761269.png


Also, in a typical room simulation, 200 Hz is enough for observation frequency, but is it possible to provide an option to extend it to approximately 400 to 500 Hz?
 
Last edited:
M

Mike0815

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CamillaDSP
John Mulcahy said:
Added: Multi-input capture has options to align the individual measurements to the first input's measurement using cross correlation alignment and to vector average the individual measurements, both are only available when saving inputs to individual measurements
Click to expand...
Hey John,

thanks for adding this.
Would be nice if the resulting vector average would be automatically named like the individual inputs.
E.g: Measurement with 7 mics for left speaker: L-1, L-2, L-3, L-4, L-5, L-6, L-7 => L-VectorAverage (or L-VA)
Would prefer the shorter form.
And one more wish: Could there be an option to auto remove the individual L-1, L-2, etc. after VA was generated? Or maybe some button to remove these individual measurements from last measurement run?
 
John Mulcahy

John Mulcahy

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Mike0815 said:
Would be nice if the resulting vector average would be automatically named like the individual inputs.
E.g: Measurement with 7 mics for left speaker: L-1, L-2, L-3, L-4, L-5, L-6, L-7 => L-VectorAverage (or L-VA)
Click to expand...
The "-VA" form will be used in the next build.

Mike0815 said:
Could there be an option to auto remove the individual L-1, L-2, etc. after VA was generated?
Click to expand...
I have changed the behaviour so that individual measurements do not need to be saved to generate a vector average.
 
L

LastButNotLeast

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Jun 5, 2017
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Can you make the measurements window resizable? I have to remember to change the resolution of my screen in order to get to the buttons at the bottom. And then, of course, I can't see anything else.
SNIP.png

Thanks.
Michael
 
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