2-Band Distortion is a crossover frequency splitter followed by a distorting waveshaper in each band. Features: Customisable linkwitz-riley crossover filter (up to 192 dB/Oct). Smooth harmonic distortion. Mathematically optimised (using psychoacoustical evaluated approximation functions). Open Source (as part of Christian's Delphi ASIO & VST Project). Manual. ... [more]

Advanced Clipper is basically a hard-clipping plugin with two stages. Additional oversampling reduces alias noise. The oversampling algorithm is based on butterworth filters (as can be found in rubberfilter) and thus will affect the group delay (you can notice a delay of some samples in extreme cases). Features: Two stages of minimum phase, butterworth oversampler. Hard clip at higher sample rates. Oversampling of up to 16x (in both stages). Filter order up to 64 (using the max. order will introduce noticeable group delay). Tunable transition frequency (in parameter view). ... [more]

Barberpole Flanger offers a simple "Barberpole flanger" implementation. Barberpole flanging is also known as "infinite flanging", this sonic illusion is similar to the Shepard tone effect. The sweep of the flanged sound seems to move in only one direction ("up" or "down") infinitely, instead of sweeping back-and-forth. Features: 4 different algorithms. Up to 8 stages for smooth and blurry flanging. Independent control of depth and modulation speed. Manual included. Open Source. ... [more]

Bugpass (lite) is a linear phase bandpass filter with sliders which enable a quick visual reference to the size of the frequency band being passed through. Features: Linear phase FIR bandpass filter (512 taps). Based on a Blackman window. Low CPU usage. Open source. Simple user interface. Manual included. ... [more]

Christortion simply excites the harmonics of the input signal. It is also possible to invert the phase of each harmonic. This concept guarantees a very surgical control over the distortion produced.... [more]

Dual Channel FFT is a program that analyses the spectral difference between two measurement points. This can be useful to measure the electro- and acoustical chain during a live performance. Additionally the program can visualize the processing of VST Plug-ins, export the frequency response to TXT/BMP and export the impulse response to WAV.Dual Channel FFT is free for non-commercial use.... [more]

Dual Linkwitz-Riley Filters is a pair of stereo Linkwitz-Riley Filters. It can be used as a lowpass, highpass or bandpass filter and has been optimized to be used in a virtual digital crossover network. Features: Variable order cascaded butterworth filters (AKA Linkwitz-Riley filters). Automatic phase compensation (for 2-way systems). Low CPU usage. Open source (MPL / LGPL). Manual. Preset exchange across the instances. ... [more]

Frequency Splitter for Modular Hosts is a Linkwitz Riley Crossover. Features: 1 in, 2 out. Selectable frequency. Selectable order (starting from 12dB/Oct up to 192dB/Octave). Sample-rate independent. Using host dependent GUI. ... [more]

Lightweight Multiband Compressor is a lightweight multiband compressor based on Christian's Lightweight Soft Knee Compressor. Features: Lightweight multiband compressor. Second order linkwitz-riley crossover filter. Continuous and consistent characteristic. Fully adjustable soft knee in dB (as margin below the threshold). Mathematically optimised (using three psychoacoustical evaluated approximation functions). Open source (as part of Christian's Delphi ASIO & VST Project). Manual. ... [more]

Lightweight Soft Knee Compressor is a soft knee compressor optimized for low CPU usage. While it is not that difficult to build a hard knee compressor with a low CPU usage, it is quite difficult to do so for a soft knee, especially if you want to control the margin around the threshold precisely while maintaining a consistent curve. The compressor also features a simple limit circuit to avoid clipping. Features: Lightweight soft knee compressor. Continuous and consistent characteristic. Fully adjustable soft knee in dB (as margin below the threshold). Stereo/dual mono processing. Extra l... [more]

Lightweight Soft Knee Gate is a soft knee gate optimized for low CPU usage based on Christian's Lightweight Soft Knee Compressor. Features: Lightweight soft knee gate. Continuous and consistent characteristic. Fully adjustable soft knee in dB (as margin below the threshold). 10 presets. Mathematically optimised (using three psychoacoustical evaluated approximation functions). Open source (as part of Christian's Delphi ASIO & VST Project). ... [more]

Lightweight Soft Knee Limiter is a soft knee limiter optimized for low CPU usage based on Christian's Lightweight Soft Knee Compressor. Features: Lightweight soft knee limiter. Continuous and consistent characteristic. Fully adjustable soft knee in dB (as margin below the threshold). 10 presets. Mathematically optimised (using three psychoacoustical evaluated approximation functions). ... [more]

Linear Phase Frequency Crossover for Modular Hosts is a Linear Phase Crossover. Features: 1 in, 2 out. Selectable frequency. 512 FIR filter coefficients (higher on request). Sample-rate independent. Fast (using the IPP). Open source (excluding IPP). Using host dependent GUI. ... [more]

Lookahead Limiter is a peak stop look-ahead limiter. It features a smooth attack and an adjustable release curve. Features: Peak stop lookahead limiter (64 samples latency). Stereo processing to preserve the stereo image (3 modes available). Smooth attack envelope. 9 presets. Open source (as part of Christian's Delphi ASIO & VST Project). Manual included. ... [more]

Noise Reduction is a plug-in containing a spectral noise gate optimized to remove unwanted noise. Features: Highly customisable spectral noise gate. Continuous and consistent characteristic. Fully adjustable soft knee in dB (as margin below the threshold). Several exotic window functions available. Low CPU usage. Different FFT sizes. Manual included. Open Source (as part of the Delphi ASIO & VST Project). ... [more]

Features: 7 band parametric EQ. 7 filter types (lowpass, lowshelf, peak, bandpass, allpass, highshelf, highpass). Bypass function. Low CPU-Usage (due to hand optimized DSP algorithms). 6 assignable snapshots. ... [more]

posihfopit is a soft clip EQ effect plug-in.With posihfopit you can very easily equalize your audio material, but furthermore the plugin will add a new color to the sound. Due to its unique transistor based algorithm, a small amount of soft distortion is applied according to the filter band used. This way your material gets kind of "creamier". Features: 8 band EQ (with additional soft clip). Peak / LPF / HPF / LowShelf / HighShelf / Allpass / Notch / Bandpass / Moog. Auto filter calculation (5 different algorithms). Skinnable/intuitive GUI (several skins included). Integrated overv... [more]

The Quadropolis Surround-Plugin is a VST effect Plugin dedicated to Quadraphonic Music. There was a lot of research on Quadraphonics back in the early 70s. This Plugin simulates an anechoic chamber with 4 loudspeakers in it (starting from 45° in 90° steps). Within the soundfield there is - of course - the listeners head, which is simulated with a 512 Tap HRTF-Convolver (FIR-Filter). This causes high CPU-Load (about 50% @2GHz, but improvements are on the way). The plugin gives you the ability to mix your quadraphonic music, without using 4 loudspeakers. Only Headphones are needed. Just ... [more]

Rubberfilter offers four classic filter modes to cut frequencies with up to 384 dB/Oct. It removes frequencies in any audio signal, while providing an additional creative purpose. Rubberfilter has a controllable filter order of 6 dB/Oct up to 384 dB/Oct. At high filter order levels, a psychoacoustic effect appears which is usually an unwanted sound of zips and sweeps, almost as if there is a tone present at the filter's cut-off frequency. Rubberfilter allows you to use this psychoacoustic effect for creative purposes.Christian Budde and, fellow KVR member, Dalor created Rubberfilter. The idea... [more]

This plugin demonstrates basically how sigma delta converters work. It was mainly written for educational purpose, so it does not claim do deliver a good sound.... [more]

Simple Chorus was created as part of Christian Budde's Delphi ASIO & VST Open Source Project. It is one of several examples and the full source code is available. The effect itself is nothing more than a simple chorus implementation with up to 8 stages, speed 0.01-10 Hz and a depth of several octaves (frequency dependent). A mix parameter controls the balance of the sound (0% = dry, 100% = wet). Additionally a drift parameter controls the stereo width and the thickness of the sound.... [more]

WinAmp VST Host is a DSP/Effect plug-in for WinAmp that hosts VST effect plug-ins allowing you to use your favourite VST plug-ins within WinAmp.... [more]

VST interfaced ASIO-Host is an ASIO-Host compiled as VST plug-in. It allows you to use an external device via ASIO through the VST plug-in interface. Features: Open source. Simple user interface. Manual included. ... [more]

VST Plugin Analyser is a measurement tool for VST Plugins. It can be used by plugin developers for debugging and as a quality control tool, since it can work with virtually any sample rate and any VST Host settings. Furthermore several automated tests are included. A simple interface makes it easy to use for anyone. Predefined measurements allow to measure the impulse response and thus the magnitude and phase response of any VST effect plugin. Different excitation signals also allow to get an overview how non-linearities affect the impulse response. For further nonlinear investigations, a ded... [more]

VST-Plugin Unit Test is an 'Extreme Programming' unit test for generic VST-Plugins. It is based on DUnit and allows automated tests for a whole collection of plug-ins. It was written to ensure the quality of Christian's open source project, but might be useful for other plug-in developers as well. A detailed manual explains all tests.... [more]