BiquadLimiter is a biquad filter plug-in whitch has a dynamic range limiter in front of the feedback section (Limiter1) and an another limiter in the final section (Limiter2). This plug-in is made with C++ and JUCE.
- You can see the six coefficients (a0, ..., b2) of the biquad filter that determine the behavior of the filter. Changing either Frequency / Q / Type will move the coefficient sliders. (See this link for information on biquad filter coefficients.)
- The coefficient values a0, ..., b2 can be set individually. This feature gives you a frequency response that is difficult to achieve with a regular 1-channel filter plug-in.
- The two limiters prevent the output from becoming too loud when the filter is unstable or the input is too loud. In addition, the front limiter generates a unique sound by feeding the compressed sound back to the biquad filter.
BiquadLimiter can run inside plugin hosts that supports VST, VST3, or AU.
In : The input gain before the filter unit.
Freq: The cutoff frequency of biquad filter.
Q: The q of biquad filter.
Type : This is a combo box to choose filter type. You can select one from LPF (low-pass), BPF (band-pass) and HPF (high-pass).
a0, ..., b2 : The coefficients of the biquad filter.
Fine : The button to turn on / off the fine adjustment mode of coefficient slider.
Limiter LED : This LED indicates whether the limiter is working.
Frequency display : The graph shows the ideal filter frequency response without the effect of the limiter.
The y axis shows gain (dB) and the x axis shows frequency (Hz).
This project can be compiled by running the BiquadLimiter.jucer file.
You need following libraries.
- JUCE (v6.0.3)
- VST SDK (v3.6.10)
If you want build VST (not VST3), you need to use VST SDK v3.6.10 or earlier.
You can download pre-built binaries for Mac.
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