Vintage analog VU meter VST

ocenaudio is a cross-platform, easy to use, fast and functional audio editor. It is ideal for people who need to edit and analyze audio files without complication. ocenaudio also has powerful features that will satisfy more advanced users including VST plugin support.

ZynAddSubFX is a fully featured open source software synthesizer capable of making a countless number of instruments …
zynaddsubfx.sourceforge.net
zynaddsubfx.sourceforge.net/download
VST version
en.wikipedia.org/wiki/ZynAddSubFX
Wavosaur is a cool free sound editor, audio editor, wav editor software for editing, processing and recording sounds, wav and mp3 files. Wavosaur has all the features necessary in order to edit audio (cut, copy, paste, etc.) produce music loops, analyze, record, and batch convert.
Wavosaur supports VST plugins, ASIO driver, multichannel wav files, real time effect processing.
The program has no installer and doesn’t write in the registry. Use it as a free mp3 editor, for mastering, sound design. The Wavosaur freeware audio editor works on Windows 98, Windows XP and Windows Vista.

Produce music with your computer by creating melodies and beats, synthesizing and mixing sounds, arranging samples and much more. Playback instruments, samples and plugins with a typing or MIDI keyboard in a user-friendly and modern interface. Bundled with ready-to-use content from an assortment of instrument and effect plugins, presets and samples to VST and SoundFont support.

Equalizer APO is a parametric / graphic equalizer for Windows. It is implemented as an Audio Processing Object (APO) for the system effect infrastructure introduced with Windows Vista.
Features:
- virtually unlimited number of filters
- works on any number of channels
- very low latency, which makes it suited for interactive applications
- low CPU usage
- modular graphical user interface
- VST plugin support
- integrates into Voicemeeter (www.voicemeeter.com)
Equalizer APO is best used in conjunction with Room EQ Wizard (www.roomeqwizard.com ), because it can read its filter text file format.

sourceforge.net/projects/equalizerapo
Discussion
Documentation
Downloads
Peace Equalizer
EQ APO GUI
mega-switcher
Grab yourself a nice audio interface. Plug in a microphone or a keyboard. Import audio or MIDI from your hard drive or the Freesound database. Cut, move, stretch, copy, paste, delete, align, trim, crossfade, rename, snapshot, zoom, transpose, quantize, swing, drag, drop. All with unlimited undo/redo. All in the same window.
Mix, mute, solo, fader, automate, EQ, dynamics, insert, send, pre-fader, post-fader, sync, monitor, isolate. Floating point fidelity, the most flexible mixer architecture in the industry, hundreds of plugins and external control surfaces.

ardour.org
community.ardour.org/download
Plugins
en.wikipedia.org/wiki/Ardour_(software)
Convolver is an open source, high performance Windows application for applying finite impulse response (FIR) filters to multi-channel digital audio in the form of
- a real time DSP audio plug-in (DMO) for Windows Media Player. The install package also contains
- two DirectX / DirectShow filter versions — ConvolverWrapper or the equivalent ConvolverFilter — for Adobe Audition and real time applications such as Zoom Player Pro, TheaterTek 2.2, Windows Media Player Classic, J.River Media Center (when used with the DirectX host plug-in), or Console. See the setup walkthrough for ZoomPlayer after reading this page for further details. In many cases the DMO will also work.
- a VST plug-in version (convolverVST). Finally, there are a number of
- command line applications for testing performance, and convolving files offline, for example. convolverPipe can filter SlimServer playback.
Convolver will take a set of FIR filter files (sound files) and convolve them with sound paths mixed from the input channels, mixing the results into a set of specified output channels.
