Advanced Filters in Reaktor Core
Here come the solutions for Vadim's DSP Tutorials
DESCRIPTION
Vadim has decided to release the Core structures that he created for the tutorials accompanying his DSP articles on the NI Wesite.
1) "Preserving the LTI system topology in s- to z-plane transforms"
2) "Frequency-scaling of discrete-time LTI system responses"
3) "Computational optimization of nonlinear zero-delay feedback by second-order piecewise approximation"
http://www.native-instruments.com/index.php?id=dsparticles&L=1
The three ensembles allow to directly try out the improvements archieved by the described methods.
In a nutshell: it's a way to get high-quality filters without oversampling.
For the third article we have added a mp3 audio demo. It showcases the behaviour of four types of filters running at 44.1 Khz samplerate.
0:00 min: Ladder
1:35 min: State Variable LP2
2:40 min: State Variable BP2
3:50 min: State Variable HP2
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