VST equalizer demo.

[Dell]

Hi.

Here is a video on how a wider bandwidth will prevent high frequency roll-off based on a limited bandwidth.

The video also shows how low pass filtering will not always be helpful when one is aiming to reduce frequencies above 20 kHz using high sample rate files.

http://www.youtube.com/watch?v=ibmKIBlq0b0

Cheers!

[tor]

I have found the best result for the EQ is by using double precision in the multips, adds and subs in direct form II ( See here: http://synthmaker.co.uk/forum/viewtopic.php?f=12&t=9771 ).
Because of this it is impossible to use oversampling in SM. No longer ability to shuffle the index. But my ears like it when i use the oversampling components to do two independent processes and then "downsample" it again. The EQ also seem more stable with this solution aswell, thoug it doubles the CPU. But that would also be the case with "regular" OS in SM.

Please test and give me feed back.

Tor

[Dell]

Hi

The load time is very slow on Reaper & Samplitude. Possibly the noise file is causing the problem?


96 kHz Wave File = 75%

44.1 kHz Wav File = 34.9 %

Using a 24 bit/96 kHz Wave File


Upon flipping the High Pass/Low Pass filters the CPU jumped from 75 – 86%, the sound jittered and, Samplitude halted at 141%.

Please note that none of the controls were altered except the high-pass/low-pass filters.






Using a 16 bit/44.1 kHz Wave File

Upon flipping the High Pass/Low Pass filters the CPU jumped from 35 – 66%, then 99%.

Please note that none of the controls were altered except the high-pass/low-pass filters.





All of this occurs on a Pentium 4, 2.8 GHZ, with 2 GB of RAM. It appears my PC is not strong enough to evaluate your plug-in.

Cheers!

[aliasant]

I too have a denormal problem but only on the HP filter.
If I switch it on and then back of CPU raises from 0.81% to 2.75% and back to 0.81 if I switch it back on again.
This is in Reaper 48kHz 24Bit

[tor]

Ok.. thank you both.

There was a huge difference in CPU load on your systems.
On mine Core 2 duo @ 2.4 it use prox 8-10% in Reaper at 44100.

I have to take a closer look at the HP.

This will be a quite CPU hungry thing any how due to lack of optimization ability using double pecision and doubling load with 2* "OS".

But I think it sound very pleasing and is quite precise as required in the mastering processor i have in mind.

[Dell]

Hi.

Providing you are not going to offer this to the public, by all means enjoy your equaliser.

Cheers!

[tor]

Denormals taken care of in both LP & HP. I forgot to feed them with noise when disconnected.

[tor]

To day I had some time to do some testing myself. And yes Dell I see your point.

@ 192000 SR I get over 300% CPU load

Maybe I have to comprimize my demands on this one

[tor]

Solved this problem by auto disabling 2*OS when SR over 48000. Now CPU l0oad is down to 36% at 192000

This makes sence to do any way. At 88200 there is no need for OS at all

[tor]

Adding the OS switch made me aware of chages to the stereo image. When OS is enabled image is narrower.

[tor]

Dough..... never mind!

Cable ERROR

Please forgive me shouting so quicly

This time the EQ is ready for some real testing.

Please give me feedback whether or not you can differ the sound with OS on/off. And generally other issues like overall sound, CPU load and host compability with different settings in SR and bit depth.

[Dell]

Hi.

If someone doesn't evaluate your plug-in on a computer not as powerful as yours, I will give you an analysis on Wednesday.



Cheers!

[mHz]

These suffer hughe denormal problems.. Seems to be zero related.
But im too lazy to look yust guessing

[tor]

These suffer hughe denormal problems.. Seems to be zero related.
But im too lazy to look yust guessing

I guess that would be one of the earlier versions. There is no denormal problems as I can recognize in the last posted EQ.

Hi.

If someone doesn't evaluate your plug-in on a computer not as powerful as yours, I will give you an analysis on Wednesday.

Cheers!

Ok thanks Dell. I guees it now will be usable even on a P4 machine. But this is still going to ba a quite CPU hungy thing.

[tor]

These suffer hughe denormal problems.. Seems to be zero related.
But im too lazy to look yust guessing

I guess that would be one of the earlier versions. There is no denormal problems as I can recognize in the last posted EQ.

Dont forget to eat and drink. I is also important to take brakes from the computer screen. mHz you were perfectly right. Some times (very often) I get blind working on stuff. I will get back to you when I have done some proper testing myself...

For now thanks for the feedback

Tor