Recent content by jjazdk

I also daisy chain two soundcards, to get enough output channels :) My main audio interface is a Prism Sound Atlas connected via USB to my HTPC. Then I use an optical connection from the Atlas card to an RME Fireface UCX (on which I presently use 4 channels for my subwoofers).

I have not tried Dirac, as it does not support my setup. And, you are right, Dirac does not support digital crossovers for multiway speakers.

Audiolense can treat subwoofers in two ways: 1. As one big subwoofer, all drivers combined and one correction filter. 2. As x-number of stand alone speakers, that does not know about each other. The answer to your question is: Audiolense does not directly take into account the effect of...

No, AudioLense cannot do that. You could instead experiment with MSO, as it can simulate the response of an "love active treatment" setup.

Why don't you look at the correction filters, they will show you exactly what AL will do.

It is not feasible, as the compression effect is highly non-linear. Also you listen to music, which in nature is dynamic (crest factor), and the heating of the voice coil is not comparable to a constant voltage log sweep. If anything a correction would make it worse, as its estimate of the...

Agreed, narrow notches are not much detrimental to the sound quality. Narrow peaks on the other hand, can be very annoying. Wether or not a single microphone position is enough is not as clear cut. But if you want to measure at the ears, I would propose doing a long average (80-100 averages) by...

Could you show us how to tweak the x-over settings to do this? I have re-arranged my subwoofers and added extra channels, and am considering giving Audiolense another chance, especially if more multisub features was available. Letting my front speakers be part of the subwoofer "array" is a big...

Seriously, you think your opinion carries more weight because you have been in an anechoic room? I have access to anechoic rooms (yes, in plural) at my work everyday, but that does not mean my opinion is worth more than others. I am also a Senior Acoustics engineer, and have been so for many...

I disagree. For most microphones, the variations in their frequency response is much bigger than what an objective measurement can tolerate, therefore there is a need for the calibration file. And no, the microphone in your Mac laptop (or any other laptop for that matter) is not even close to...

It is wonky, because the microphone was not made for extension to 25kHz.

That is a valid concern. Considering that the calibration applies almost 25dB of gain at 25kHz compared to 10kHz, no I would not trust measurements at 25kHz. Have you compared the original microphone calibration to the Cross Spectrum one?

That sounds more like a JRiver issue, than an RME issue. We use the Fireface UCX in our audio measurement systems, and have absolutely no issues with multichannel in/out from them. Even when running several software suites simultaneously on the same UCX interface and mixing ASIO/WDM, everything...

Cornelis, please be aware of the scaling on your y-axis, as a roughly 200dB axis will hide any important information. A good ruel of thumb is to never have more than 60dB as the total scale on the y-axis.

Your result looks like a target curve