Proceedings of the 24th International Conference on Digital Audio Effects (DAFx20in21)

This is Vol.2 of the DAFx2020s Vienna collection

Vienna, Austria, September 8-10, 2021

These Proceedings contain the accepted papers from the second DAFx2020s Vienna call for papers in 2021

DAFx20in21 is being organised by a team of researchers from the following Institutions in Vienna:

Local Organising Committee

Website address:

Proceedings as a single pdf

Session 1: Virtual Analog

Identification of Nonlinear Circuits As Port-Hamiltonian Systems
Judy Najnudel, Rémy Müller, Thomas Hélie and David Roze

Arbitrary-Order IIR Antiderivative Antialiasing
Pier Paolo La Pastina, Stefano D'Angelo and Leonardo Gabrielli

An Equivalent Circuit Interpretation of Antiderivative Antialiasing
Kurt James Werner

Non-Iterative Schemes for the Simulation of Nonlinear Audio Circuits
Michele Ducceschi, Stefan Bilbao and Craig J. Webb

Applications of Port Hamiltonian Methods to Non-Iterative Stable Simulations of the Korg35 and Moog 4-Pole VCF
Mohammed Danish, Stefan Bilbao and Michele Ducceschi

Differentiable White-Box Virtual Analog Modeling
Fabián Esqueda, Boris Kuznetsov and Julian D. Parker

Practical Virtual Analog Modeling Using Möbius Transforms
François G. Germain

Session 2: Analysis and Manipulation

Amp-Space: A Large-Scale Dataset for Fine-Grained Timbre Transformation
Jason Naradowsky

Damped Chirp Mixture Estimation via Nonlinear Bayesian Regression
Julian Neri, Philippe Depalle and Roland Badeau

SiTraNo: A MATLAB App for Sines-Transients-Noise Decomposition of Audio Signals
Leonardo Fierro and Vesa Välimäki

On the Estimation of Sinusoidal Parameters via Parabolic Interpolation of Scaled Magnitude Spectra
Marcelo Caetano and Philippe Depalle

Session 3: Audio Processing and Effects

Optimal Integer Order Approximation of Fractional Order Filters
Pier Paolo La Pastina and Stefano D'Angelo

Conformal Maps for the Discretization of Analog Filters Near the Nyquist Limit
Champ C. Darabundit and Jonathan S. Abel

Simulating a Hexaphonic Pickup Using Parallel Comb Filters for Guitar Distortion
Sebastian Laguerre and Gary P. Scavone

Interacting with Digital Audio Effects Through a Haptic Knob with Programmable Resistance
Yuri De Pra, Federico Fontana and Stefano Papetti

Adaptive Pitch-Shifting with Applications to Intonation Adjustment in A Cappella Recordings
Sebastian Rosenzweig, Simon Schwär, Jonathan Driedger and Meinard Müller

One-to-Many Conversion for Percussive Samples
Jon Fagerström, Sebastian J. Schlecht and Vesa Välimäki

Session 4: Physical Modeling

Object-Based Synthesis of Scraping and Rolling Sounds Based on Non-Linear Physical Constraints
Vinayak Agarwal, Maddie Cusimano, James Traer and Josh McDermott

Dynamic Grids for Finite-Difference Schemes in Musical Instrument Simulations
Silvin Willemsen, Stefan Bilbao, Michele Ducceschi and Stefania Serafin

A Physical Model of the Trombone Using Dynamic Grids for Finite-Difference Schemes
Silvin Willemsen, Stefan Bilbao, Michele Ducceschi and Stefania Serafin

Air Absorption Filtering Method Based on Approximate Green's Function for Stokes' Equation
Brian Hamilton

Real-Time Implementation of a Friction Drum Inspired Instrument Using Finite Difference Schemes
Marius George Onofrei, Silvin Willemsen and Stefania Serafin

On the Equivalence of Integrator- and Differentiator-Based Continuous- and Discrete-Time Systems
Vadim Zavalishin and Julian D. Parker

Session 5: Spatial Audio and Artificial Reverberation

Higher-Order Anti-Derivatives of Band Limited Step Functions for the Design of Radial Filters in Spherical Harmonics Expansions
Nara Hahn, Frank Schultz and Sascha Spors

Modal Spring Reverb Based on Discretisation of the Thin Helical Spring Model
Jacob McQuillan and Maarten van Walstijn

Spherical Decomposition of Arbitrary Scattering Geometries for Virtual Acoustic Environments
Raimundo Gonzalez, Archontis Politis and Tapio Lokki

The Role of Modal Excitation in Colorless Reverberation
Janis Heldmann and Sebastian J. Schlecht

Parametric Spatial Audio Effects Based on the Multi-Directional Decomposition of Ambisonic Sound Scenes
Leo McCormack, Archontis Politis and Ville Pulkki

Session 6: Synthesis

One Billion Audio Sounds From GPU-Enabled Modular Synthesis
Joseph Turian, Jordie Shier, George Tzanetakis, Kirk McNally and Max Henry

A Generative Model for Raw Audio Using Transformer Architectures
Prateek Verma and Chris Chafe

Combining Zeroth and First-Order Analysis with Lagrange Polynomials to Reduce Artefacts in Live Concatenative Granulation
Dario Sanfilippo and Julian D. Parker

Alloy Sounds: Non-Repeating Sound Textures with Probabilistic Cellular Automata
Tiago Fernandes Tavares, Thales Roel P. Pessanha, Gustavo Nishihara and Guilherme Zanchetta L. Avila

Graph-Based Audio Looping and Granulation
Gerard Roma, Pierre Alexandre Tremblay and Owen Green

Topologizing Sound Synthesis via Sheaves
Georg Essl

Session 7: Machine Learning and Music Information Retrieval

Bio-Inspired Optimization of Parametric Onset Detectors
Domenico Stefani and Luca Turchet

Improving Synthesizer Programming From Variational Autoencoders Latent Space
Gwendal Le Vaillant, Thierry Dutoit and Sébastien Dekeyser

Exposure Bias and State Matching in Recurrent Neural Network Virtual Analog Models
Aleksi Peussa, Eero-Pekka Damskägg, Thomas Sherson, Stylianos I. Mimilakis, Lauri Juvela, Athanasios Gotsopoulos and Vesa Välimäki

Transition-Aware: A More Robust Approach for Piano Transcription
Xianke Wang, Wei Xu, Juanting Liu, Weiming Yang and Wenqing Cheng

Quality Diversity for Synthesizer Sound Matching
Naotake Masuda and Daisuke Saito

An Audio-Visual Fusion Piano Transcription Approach Based on Strategy
Xianke Wang, Wei Xu, Juanting Liu, Weiming Yang and Wenqing Cheng