Four-band parametric equaliser LV2 plugin. DSP code by  Fons Adriaensen.

Overview

Stereo and mono LV2 plugins, four-band parametric equalisers. Each section has an active/bypass switch, frequency, bandwidth and gain controls. There is also a global bypass switch and gain control.

Screenshot

DSP

The 2nd order resonant filters are implemented using a Mitra-Regalia style lattice filter, which has the nice property of being stable even while parameters are being changed.

All switches and controls are internally smoothed, so they can be used 'live' whithout any clicks or zipper noises. This should make this plugin a good candidate for use in systems that allow automation of plugin control ports, such as Ardour, or for stage use.

The DSP code is written by  Fons Adriaensen.

GUI

The GUI provides knobs and toggle buttons for tweaking filter parameters. It also provides frequency response widget with differently coloured curve for each section and separate curve for total equalization effect.

The GUI uses the  External UI extension.  lv2rack (part of zynjacku) supports this extension. Ardour 2.8.3 is capable to display the UI. Ardour-2.8 before 2.8.3 needs  patch to support the external UI extension.

Get it

Latest version is 2.0

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You can use package management system:

•  Binary and source packages for  openSUSE are available from  PackMan.

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You can download latest source code tarball from  here.  PGP Signature

Read the INSTALL file in distributed tarball for more info about dependencies.

Here is the  list of all released tarballs and their PGP signatures.

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You can also get source code from the GIT repository:

git clone http://nedko.arnaudov.name/git/lv2fil.git

Or you can browse the source through Trac Browser or  CGIT.

Feedback

If you have trouble getting lv2fil working, found a bug or you miss some feature, please create new ticket here. lv2fil is written and supported by Nedko Arnaudov. You can reach me at nedko (a.t) arnaudov (dot) name. I can also be found in #lad on FreeNode (as nedko).