Recent content by dcibel

It's no problem, I can get what I need from the LTI file, I was just curious.

REW absolutely will show you the modelled impedance curve.

Make sure the acoustic reference is somewhat near the mic, of reasonable volume so it's well captured by the mic, and a driver with high frequency output, ie a tweeter. If there's significant reflections in the reference recording, REW may have a hard time picking out the fundamental impulse...

As another feature request, while I absolutely love the "measure with these filters" functionality within the EQ window, it's use in REW is quite cumbersome. It's very often that I need to take many measurements with a specific filter, and each time going through the process of selecting the...

Hello, For FSAF, I've noticed when using filters such as "measure with these filter" via the EQ window, that saving the excitation WAV file doesn't include the filtered result, it appears to simply be a copy of the original audio for the time length specified. Should this wav file not include...

I see no reason for you to do anything more than follow the REW measurement guide for VituixCAD. If you want to develop the digital filter within VituixCAD, maybe start with setting the Generic DSP system in the options (and select sample rate matching your DSP config) and confirming that filter...

Textbook is exactly that, a filter response that follows the textbook definition for LR, BW, etc. It assumes input is flat response, for loudspeakers a textbook filter provides no consideration for the non-linear acoustic magnitude response, so while the electrical filter follows LR24 transfer...

Ok, no problem. You are using a "textbook filter" and it doesn't provide a textbook acoustic response, this is expected. I think you are over-complicating things though. This is what I would do: Complete measurement process detailed in VituixCAD guide to create the full-space response for your...

When you said "I am trying to adjust a speaker with a DSP EQ to have a flat low frequency SPL indoors." that's what implied room EQ to me. Instruction on combining near field, far field, and diffraction in all detailed in the VituixCAD guide, so I guess I'm not understanding what part you're...

That's why you take average of multiple locations of seating area, or use RTA average to capture a room response quickly. No longer talking about room EQ. If you want to measure for loudspeaker crossover design, I recommend combining REW with VituixCAD and following the great guide that exists...

It doesn't make sense to EQ a calculated far field response that doesn't include room effects which will dominate the response at low frequency. Just measure the speaker in-room and EQ directly from there.

I'm a fan of M-Noise for general noise stimulus that resembles audio spectrum, a lot better than pink noise anyway. I think Stoneeh's trying to compare result of FSAF to a multitone IMD type of measurement, so needs to keep the magnitude spectrum and crest factor similar or it's not a very equal...

Like I said, step 3 is not correct, RTA measurements include mic calibration already. I believe something is wrong if you can't take a sweep with long window and RTA with mic in the same location and overlay them like I have shown above. From the help file "If Mic/Meter calibration file or...

Set gain appropriately in order to capture the intended signal while allowing some headroom to avoid clipping. Generally input level around -12 to -20dBFS for normal signal level is generally ok and will retain good enough SNR. I have found an SPL calibrator to be quite useful, running SPL...