The parametric EQ is an audiophile function, and right now it performs as advertised. I would be nervous about advertising a 20 band EQ which in fact is only an approximation of the expected function - audiophile types are very scathing about that sort of thing.

Anyway, it's a lot of mathematics and work for something with rather limited commercial and functional gain. I don't think we'll be pulling John away from RDS for this one.

Rob

you'd then have to install the empeg upside down and that would be unacceptable.

Unacceptable? No, it would be great! We would have the volume control on the left where it should be, and the problem some of us have with not being able to read the first few letters of the info display would be solved as well.

I think you're on to something here, Calvin!

tanstaafl.



"There Ain't No Such Thing As A Free Lunch"

I agree, but I just had to point out that it is possible. The math will kill you though.

Calvin

Don't forget there is a kernel switch to flip the display upside down... =)

Jazz
(List 112, Mk2 12 gig #40. Mk1 4 gig #30. Mk3 1.6 16v)

Don't forget there is a kernel switch to flip the display upside down... =)

Definitely the result of OEM work creeping into the Empeg-Car's source code. Interesting.

___________
Tony Fabris

The real problem with rotating the DSP 90 degrees is that it will start sending imaginary numbers to the DAC.



-Zandr
Mk.I #150
Mk.II #39

I agree, but I just had to point out that it is possible. The math will kill you though.

Well, I survived it (and forgotten - it was 15 years ago)... Let's see, it's 15 degrees of freedom nonlinear fit with just 20 data points. Doable, but slow and requiring good initial guess for parameters.

However, plotting the resulting curve with known frequencies (centroids), Q's (deviations) and gains (amplitudes) should be straightforward, so it should not be too difficult to show approximate shape of the envelope.

All this, of course, assuming we are talking about Gaussians added/substracted to constant response curve (or at least something else easily describable analytically). Needless to say, knowing nothing about DSPs, I don't have a foggiest idea whether they really produce something like this, or something much wildler.

BTW, didn't we already discuss this (graphical feedback was one of my wishes), and somebody said that not enough documentation on DSP algorithms is there to model response function with any accuracy?

Cheers!

Dragi "Bonzi" Raos
Zagreb, Croatia
Q#5196, MkII#80000376, 18GB green

You're right, and with all the imaginary numbers coming out, it would kill the CPU to convert them back to reals since the CPU is only operating in integer mode. ;)

Calvin