KVR Audio

IIRs · Post by **IIRs** » Mon Jul 10, 2006 4:36 pm

Much better now.

Bug-free so far here..

docdued · Post by **docdued** » Mon Jul 10, 2006 4:36 pm

syncat wrote:Really nice EQ, but got the same bug here that soundpalace wrote about - sometimes knobs stop making changes to the sound

Hmmm... could it be that you accidentally switched off some of the channels by clicking on the red bullets in the center of the gain controls?

Concerning the comparison with GEQ: I just did a quick test with Christian Buddes plugin analyzer, and the GEQ uses a different filter curve for the high shelf than the IIEQ. Consequently, the cutoff frequency is defined differently (almost in the "flat" part of the curve whereas in the IIEQ it is more in the "rising" part).

@keel: it's C++ ...

sboullion · Post by **sboullion** » Mon Jul 10, 2006 8:17 pm

Wow, this thing actually SOUNDS good.

Thanks!

TotcProductions · Post by **TotcProductions** » Mon Jul 10, 2006 8:58 pm

I must say, it does sound very nice. DocDued, could you list out all the technical differences between the IIEQ and the LP10?

Thanx

punkrockdude · Post by **punkrockdude** » Mon Jul 10, 2006 9:13 pm

In Samplitude the plugins reports peaks up to +12dBFS without any adjusments made and the sound is stuttering. It sounds like a compressor gets over rumbled by an enormous peak it didn't expect

Left Headphone · Post by **Left Headphone** » Mon Jul 10, 2006 9:53 pm

This thing sounds good. Very clean...

Debutante · Post by **Debutante** » Mon Jul 10, 2006 10:48 pm

Really really good CPU usage... don't know the ultra nitty gritty about EQ's but I'll give it much more of a try. Thank you! I do agree, though, with the suggestion for inputting of values by typing them in. And a reset button might be nice...or the ability for holding a bank.

kangul · Post by **kangul** » Tue Jul 11, 2006 6:46 am

Debutante wrote:And a reset button might be nice...

Try ctrl+left click.

insaneacyde · Post by **insaneacyde** » Tue Jul 11, 2006 6:50 am

Works like a dream in Buzz.
1.1 to 0.8 cpu!

-input values by typing would be icing on an extremely tasty double layered chocolate cake

thanx you!

docdued · Post by **docdued** » Tue Jul 11, 2006 7:53 am

TotcProductions wrote: DocDued, could you list out all the technical differences between the IIEQ and the LP10?

The big difference is that the IIEQ uses Infinite Impulse Response filters in the time domain which are relatively easy to implement and light on the CPU but introduce phase distortion, whereas the LP10 works in the frequency domain, making it possible to completely control the amplitude and phase response of the filters. By choosing a flat phase response in the frequency domain, we get a linear phase response in the time domain which leads to an EQ that does not colorize the sound as much as the IIEQ. More complicated techniques are required to achieve this, which is why the LP10 uses more CPU and was harder to code (and therefore costs a little money).

Clearly, phase distortion can also be a welcome effect, as has been discussed in this forum many times. With the IIEQ you can usually raise the higher frequencies by quite a few dB without getting a harsh sound, as the transients from, e.g., the high hats will be smeared out a little. With the LP10 you have to be more careful, because you amplify every aspect of the signal in the same way.

punkrockdude wrote: In Samplitude the plugins reports peaks up to +12dBFS without any adjusments made and the sound is stuttering. It sounds like a compressor gets over rumbled by an enormous peak it didn't expect.

That, eh, shouldn't be, of course. Does it also behave that way when you bypass all bands? There is no free samplitude demo available, unfortunately, so I can't test this.

oblagon · Post by **oblagon** » Tue Jul 11, 2006 10:34 am

LP eq with this low cpu usage is rare

. Sounds very good. I'm tempted. You should get ride of circular knob movement and add on/off switch to the LP version as well.

oblagon · Post by **oblagon** » Tue Jul 11, 2006 10:49 am

Shelfs in the LP version have no adjustable frequency. What's up with that ?

syncat · Post by **syncat** » Tue Jul 11, 2006 11:12 am

docdued wrote:
syncat wrote:Really nice EQ, but got the same bug here that soundpalace wrote about - sometimes knobs stop making changes to the sound
Hmmm... could it be that you accidentally switched off some of the channels by clicking on the red bullets in the center of the gain controls?

Seems it was it

Maybe you should add some more contrast to notice if one suddenly clicked on that red buble

NAD · Post by **NAD** » Tue Jul 11, 2006 11:30 am

arke wrote:Well, I was looking for a decent free EQ recently ...

But....

docdued · Post by **docdued** » Tue Jul 11, 2006 2:07 pm

oblagon wrote:Shelfs in the LP version have no adjustable frequency. What's up with that ?

That's merely a result of how I designed the shelfs: they are exponential curves centered at 0 Hz and at Nyquist, respectively (with everything below 0 and higher than Nyquist simply ignored) and that have a variable width. In that sense, the widths control the frequencies at which the action of the filters start.

I changed the knobs to circular behaviour, by the way. Probably will also do the on/off buttons, although due to the way the thing is coded there is basically no gain in CPU efficiency when a band is switched off.

syncat wrote: Maybe you should add some more contrast to notice if one suddenly clicked on that red buble

Good point; I changed the colors to light green/dark blue.

Free 10-band parametric EQ from ddmf