Category Archives: Digital filters

Audio Toolkit: Anatomy of a middle-side compressor

Sometimes images are worth a thousand words, so let’s look at some pictures of a middle-side compressor behavior.
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Book review: Designing Audio Effect Plug-Ins in C++: With Digital Audio Signal Processing Theory

When I looked for an audio signal processing book, I found the classic DAFX: Digital Audio Effects, but the code is mainly Matlab. Was there a book with C++ examples? That’s how I found out about this book from Will Pirkle.

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Announcement: ATKStereoCompressor 1.0.0

I’m happy to announce the release of a stereo compressor based on the Audio Toolkit. It is available on Windows and OS X (min. 10.8) in different formats. This stereo compressor can work on two channels, left/right or middle/side, possibly in linked mode (only one set of parameters), and can be set up to mix the input signal with the compressed signal (serial/parallel compression).

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Announcement: ATKUniversalDelay 1.1.0

I’m happy to announce the release of a mono fixed delay line based on the Audio Toolkit. It is available on Windows and OS X (min. 10.8) in different formats. The three knobs adjust the direct signal (blend), the delayed signal (feedforward) as well as the feedback signal from the delay line injected in the input. The delay can be set from 0 ms to 1 s by steps of 0.1 ms.

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Announcement: ATKLimiter 1.0.0, ATKCompressor 1.1.0, ATKExpander 1.1.0

I’m happy to announce the release of one new limiter plugin based on the Audio Toolkit. It is available on Windows and OS X (min. 10.8) in different formats. I also updated the compressor and the expander with improved UI controls. The compressor also has now a dry/wet knob, allowing to use it for parallel compression.

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Audio Toolkit: ATKCompressor and ATKExpander Implementation

I’d like to talk a little bit about the way a compressor and an expander can be written with the Audio Toolkit. Even if both effects use far less filters than the SD1 emulation, they still implement more than just one filter in the pipeline, contrary to a fixed delay line (another audio plugin that I released with the compressor and the expander).

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Announcement: ATKCompressor 1.0.1, ATKExpander 1.0.1

I’m happy to announce the release of two new audio plugins based on the Audio Toolkit. It is available on Windows and OS X (min. 10.8) in different formats.

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Audio Toolkit: ATK SD1 Implementation

I just released my SD1 simulation, and now it is time to explain why is inside this plugin. Not everything in the original pedal was simulated, and different schemes were used to tackle the different stages.

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