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Paper Session 4b: Physiological and Physical Foundations of Creative Systems II

May 12 @ 11:00 am - 12:30 pm
Three papers will be presented and discussed:

 

Rolf Bader and Simon Linke: “Impulse Pattern Formulation (IPF) Brain and Larynx Model as a Co-Musician Sound Synthesis Method”

A sound synthesis method is proposed as a variation of the Impulse Pattern Formulation (IPF) sound synthesis introduced before, now combining an IPF Brain model previously proposed, driven by a simple IPF of brain input stimulation and acting on a larynx IPF for vocalization. The resulting sounds produce timbre, rhythm, articulation, and large-scale form with a single algorithm reminding on complex articulated vocalization of living being. A systematic investigation of the Brain IPF with the input IPF shows many kinds of articulations for converging, bifurcating, and chaotic IPF input, but only the chaotic input has a high likeliness to end in a distinct sound. By varying the amount of excitatory vs. inhibitory neuron relations of the IPF Brain model, realistic relations found in humans are found to have a wider distribution of articulatory possibilities. Varying the adaptation strength of the Brain IPF, distinct sounds can often only be produced by certain values, where some sounds can only be produced by no or a strong adaptation but not for medium adaptation strength
values. Overall, the relation between the Brain IPF output and its parameters are too complex to easily predict its output, making this synthesis method a co-composer for a musician or composer displaying its ’own will’, so a unique sound synthesis co-musician method.

Tim Ziemer: “Mel-Frequency Cepstral Coefficients and Recording Studio Features for the Analysis of Producer-Driven Music”
In music information retrieval, Mel frequency cepstral co-efficients are a ubiquitous set of audio analysis features that has proven its value for practical tasks, like automatic genre recognition or playlist generation. However, in the recording studio practice, a very different set of audio analysis tools is consulted. In this study, we utilize audio analysis tools from the recording studio for house and techno music analysis, and compare its discriminative power and its interpretability with Mel frequency cepstral coefficients. In a quantitative style classification task, recording studio features perform slightly worse than Mel frequency cepstral coefficients. However, they are much more explanatory when it comes to exploring differences between US and German music. The set of features is a promising tool for the research of producer-driven music.
Simon Linke, Rolf Bader and Robert Mores: “Designing responsive rhythms utilizing the Impulse Pattern Formulation (IPF)”

Impulse Pattern Formulation (IPF) is an analytical modeling approach for synergetic systems motivated by research on musical instruments. It describes the nonlinear coupling of system components as the interaction between individually propagating, exponentially damped impulse trains. Due to this general approach, the IPF has been successfully applied to topics other than musical instruments and is hypothesized to be capable of modeling the entire process of musical perception and performance in the future. This work investigates how the IPF can be applied as a compositional tool that reproduces fundamental musical behavior by modelling the synchronization of musicians to an external rhythm. The derived model is systematically examined by analyzing its behavior when coupled to numerically designed and carefully controlled rhythmical beat sequences. Thus, in the future, the IPF model can be applied, e.g., to replace drum machines and click tracks with more musical and creative solutions.

 

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