Feature request - Pinknoise and filtered measurement

[Frank Koppelmans]

Hi,

First of all thanks for the software! It is very much appreciated.
I used to work in a Eastlake-room Studio and we measured a bit different.
After some experimenting we got the best results with:
Continuous Pink noise on the speakers.
A Bruel and Kjaer microphone with a filter.
So with the speakers fully loaded with pink noise (representing music with continuous full range signals).
We filtered the microphone to see the response levels in different bands.

This might be a nice option to the sweep sinus which is easy for any speaker.
A sweep filter for the mic! (digital filtering can be done very very accurate and with steep slopes)

with kind regards

Frank Koppelmans

 

[John Mulcahy]

Hi Frank, I may not be understanding the description properly, it sounds like a coarse version of an RTA. The FFT driving the RTA is essentially a collection of very narrow, very steep-sided filters.

 

[Frank Koppelmans]

Yes I understand that. We had to use a third octave graphic eq to adjust the room/speakers. So we measured at those third octave intervals and adjusted eq accordingly. There was not a display to show the whole measurement curve, there was a VU meter on a Bruel and Kjaer meter. These are the old days back in the 80's.
Later we used the Sigtech room eq, a DSP that did a lot more than eq. A impossible designed room woud actualy be workable again with the sigtech.
https://www.tnt-audio.com/ampli/sigtech.html

Maybe it would be possible to do the same with a modern computer to adjust the speakers to the room with dsp, would be nice to timealign frequencies on the listening position as to have perfect phaseresponse from left and right and low to high frequencies and leveladjustments. (what the Sigtech attempted long ago).

Thanks for your response

Frank