Focus on this release was on performance. As such the core functions were optimized, as well as some tools and EQ.
A new filter dedicated to fast convolution (using a fixed-size partition with a mix of FFT convolution and explicit FIR filter) with 0 latency was added.
Continue reading Announcement: Audio TK 0.7.0
The main changes for this release are first trials at modulated filters, C++11 usage (nullptr, override and final), and some API changes (the main process_impl function is now const).
Continue reading Announcement: Audio TK 0.6.0
Audio Toolkit is now almost ready for its first stable release. Its content will now move toward more advanced DSP algorithms (zero delay filters, amplifiers).
Continue reading Announcement: Audio TK 0.5.0
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.
Continue reading Audio Toolkit: ATK SD1 Implementation
Just after the release of ATK SD1, I updated my audio toolkit. I added a few optimizations on overdrive computations, and also for the base filter array exchange.
Continue reading Announcement: Audio TK 0.3.0
I’m happy to announce the release of my third audio plugin, the first based on the Audio Toolkit. It is available on Windows and OS X in different formats.
The UI was designed by Florent Keller, many thanks to him!
Continue reading Announcement: ATK SD1 1.0.0
It’s time for a new release of the toolkit. Much has been done in terms of basic filters, but also to simplify usage (static and shared libraries are compiled, no need to reset the pipeline before calling process…).
Continue reading Announcement: Audio TK 0.2.0
I’ve explained in earlier posts how to simulate a simple overdrive circuit. I’ve also explained how I implemented this in QtVST (and yes, I should have added labels on those images!), which was more or less the predecessor of Audio TK.
The main problem with simulating non linear circuits is that it costs a lot. Let’s see if I can improve the timings a little bit.
Continue reading Audio Toolkit: Optimization of the overdrive simulation
I’m pleased to announce the release of my first VST plugin (Windows 32bits), based on the simple overdrive prototype.
It is a mono filter, with an oversampling of 2 to 32, based on polyphase filters, and the undersampling is done after an 8th order Butterworth lowpass filter with a cut frequency of 22kHz.
The source code will be available (under the GPL) in the future if there is interest in the plugin and its support. The exact way it works will be explained in a future blog post.
The audio plugin is available on Sourceforge: https://sourceforge.net/projects/qtvst/files/QtSimpleOverdrive/
If you find any issue, please submit it on Github: https://github.com/mbrucher/qtvst
Please note that the oversampling can be quite CPU intensive (on my laptop, an Intel Core2 T7200, using an oversampling of 4 at 96kHz uses the full power of one core).