I am just learning Vituixcad. I have managed to model my crossover for a relatively simple 2.5 way tower speaker using the Satori 6.5 papyrus midbass and the TW29 silk dome tweeter.
I am using the ideal /infinite baffle traces for now, as I am still building my enclosures.
I see that I can use the Diffraction tool to model the baffle step that my front baffle would cause.
However, I am unclear how to apply / overlay this baffle step back to my response graphs? Is this possible?
I am using the ideal /infinite baffle traces for now, as I am still building my enclosures.
I see that I can use the Diffraction tool to model the baffle step that my front baffle would cause.
However, I am unclear how to apply / overlay this baffle step back to my response graphs? Is this possible?
Read this document by user @DcibeL
https://drive.google.com/file/d/1j9leycXJNvUmYZxQNVqg8U13mMRHh8Iw/view
https://drive.google.com/file/d/1j9leycXJNvUmYZxQNVqg8U13mMRHh8Iw/view
Unless the data is measured with absolute / relative phase, then all responses (especially those manipulated to factor quasi-anechoic full range responses or baffle diffraction etc...) must use "minimum / derived phase" (checkbox per driver on the driver tab in VCad) plus you need to estimate the voice coil offset on drivers recessed relative to your on axis driver (essentially if your axis is tweeter, then you need to provide positive Z for voice coils further away). The tricky part is estimating the amount of Z (delay) so you get correct phase summation for your intended crossover.
You might get some insights from here:
https://kimmosaunisto.net/Software/VituixCAD/VituixCAD_Measurement_REW.pdf
When you measure pseudo-anechoic response using gated measurement, you can get down to between 200Hz and 400Hz. This does not give one sufficient bandwidth to see the complete baffle step transition and, also, not any low frequency information. The method to achieve a full-range measurement involves splicing a near-field low-frequency measurement to the far-field (gated) measurement. However, although this brings you a step closer to a correct full-range measurement, it is just a bit too simple to be accurate. You can get a better picture of the baffle step transition range by using the nearfield measurement and applying baffle diffraction simulation to it. In the document linked above, Kimmo describes the process to do this.
https://kimmosaunisto.net/Software/VituixCAD/VituixCAD_Measurement_REW.pdf
When you measure pseudo-anechoic response using gated measurement, you can get down to between 200Hz and 400Hz. This does not give one sufficient bandwidth to see the complete baffle step transition and, also, not any low frequency information. The method to achieve a full-range measurement involves splicing a near-field low-frequency measurement to the far-field (gated) measurement. However, although this brings you a step closer to a correct full-range measurement, it is just a bit too simple to be accurate. You can get a better picture of the baffle step transition range by using the nearfield measurement and applying baffle diffraction simulation to it. In the document linked above, Kimmo describes the process to do this.