[Top] [All Lists]

Re: EQ audio plugin

Subject: Re: EQ audio plugin
From: "picnet2" picnet2
Date: Sun Jun 21, 2009 2:37 am ((PDT))

    I use SEQ2 From Neugen audio for the EQ part, and Visualizer from the s=
ame company to eyeball / control the process. - Both are good but have some=
 stability issues with wave editor.

An example from SEQ2:-
Exciting Rain barrel sounds - not had a chance to get to the river with thi=
s one yet...

This is from a simple DIY hydrophone, after EQ

Hot glue inside (so the pzt can flex) / delrin (Acetal) exterior / Piezo se=
gment inside, screened with copper mesh - hard urethane acoustic aperture w=
hich is very important to retain high frequency content.
And before:-

Another example from a broadband hydro / in river:-

SEQ2 lets you draw the control curves to attenuate or boost specific freque=
Ive found despite this, the AUParametricEQ is still needed sometimes - norm=
ally using the ParametricEQ to find resonant nodes or to reduce interferenc=
e from e.g traffic / aircon drone etc.

One thing missing in SEQ2 is the ability to learn curves..


--- In  "justinasia" <> wrot=
> I'm trying to remove unwanted noise from a recording, perhaps a distant r=
iver or city or something.
> I'm using Wave Editor on a mac, and I am trying to control the behavior o=
f a highpass filter. Under "audio units" I have Apple, AUHipass, but it's b=
ehaviour seems strange. For example, I set the cutoff frequency to 82Hz, an=
d the "resonance" to -16dB. I'm not sure exactly what it is supposed to do,=
 but what it does is lower the volume on frequencies even as high as 200Hz,=
 very noticeably (I can see on the spectograph), perhaps even up to 400Hz b=
y the look of things. Also all the way down to the bottom (far left) of the=
 spectograph, there is still sound. So it didn't seem to cut anything off, =
merely make it quieter.
> Is there a way to actually cut off the lower frequencies? Or turn them do=
wn without effecting the higher frequencies? I would like to be able to con=
trol it. I have searched the internet and I did find one other plugin calle=
d "MU xEQ", which at least has a picture so you can see the shape of how it=
 is to change the frequencies, although it really doesn't seem to be easily=
 controllable either (for example the slope cannot be set very steep, so it=
 still ends up interfering with a very wide range of frequencies.
> What I imagine would be useful is something which actually lets me cutoff=
 frequencies below a certain level, and also lets me choose the steepness o=
f the curve of how sudden the cutoff is. Or even just shape the whole frequ=
ency curve as I choose.
> Is there a plugin anyone can recommend? Hopefully free, but if there is o=
ne which is not too expensive but obviously better for this purpose, I woul=
d be glad to hear about it.
> Thanks
> Justin

<Prev in Thread] Current Thread [Next in Thread>

The University of NSW School of Computer and Engineering takes no responsibility for the contents of this archive. It is purely a compilation of material sent by many people to the naturerecordists mailing list. It has not been checked for accuracy nor its content verified in any way. If you wish to get material removed from the archive or have other queries about the archive e-mail Andrew Taylor at this address: andrewt@cse.unsw.EDU.AU