2021 24th International Conference on Digital Audio Effects (DAFx)最新文献_第4页

A Physical Model of the Trombone Using Dynamic Grids for Finite-Difference Schemes 基于有限差分格式的动态网格长号物理模型

2021 24th International Conference on Digital Audio Effects (DAFx) Pub Date : 2021-09-08 DOI: 10.23919/DAFx51585.2021.9768286

S. Willemsen, S. Bilbao, M. Ducceschi, S. Serafin

引用次数: 0

Optimal Integer Order Approximation of Fractional Order Filters 分数阶滤波器的最优整数阶逼近

2021 24th International Conference on Digital Audio Effects (DAFx) Pub Date : 2021-09-08 DOI: 10.23919/DAFx51585.2021.9768290

Pier Paolo La Pastina, Stefano D'Angelo

引用次数: 1

Damped Chirp Mixture Estimation Via Nonlinear Bayesian Regression 基于非线性贝叶斯回归的阻尼啁啾混合估计

2021 24th International Conference on Digital Audio Effects (DAFx) Pub Date : 2021-09-08 DOI: 10.23919/DAFx51585.2021.9768262

Julian Neri, P. Depalle, Roland Badeau

{"title":"Damped Chirp Mixture Estimation Via Nonlinear Bayesian Regression","authors":"Julian Neri, P. Depalle, Roland Badeau","doi":"10.23919/DAFx51585.2021.9768262","DOIUrl":"https://doi.org/10.23919/DAFx51585.2021.9768262","url":null,"abstract":"Estimating mixtures of damped chirp sinusoids in noise is a problem that affects audio analysis, coding, and synthesis applications. Phase-based non-stationary parameter estimators assume that sinusoids can be resolved in the Fourier transform domain, whereas high-resolution methods estimate superimposed components with accuracy close to the theoretical limits, but only for sinusoids with constant frequencies. We present a new method for estimating the parameters of superimposed damped chirps that has an accuracy competitive with existing non-stationary estimators but also has a high-resolution like subspace techniques. After providing the analytical expression for a Gaussian-windowed damped chirp signal's Fourier transform, we propose an efficient variational EM algorithm for nonlinear Bayesian regression that jointly estimates the amplitudes, phases, frequencies, chirp rates, and decay rates of multiple non-stationary components that may be obfuscated under the same local maximum in the frequency spectrum. Quantitative results show that the new method not only has an estimation accuracy that is close to the Cramér-Rao bound, but also a high resolution that outperforms the state-of-the-art.","PeriodicalId":221170,"journal":{"name":"2021 24th International Conference on Digital Audio Effects (DAFx)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123836458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Applications of Port Hamiltonian Methods to Non-Iterative Stable Simulations of the KORG35 and MOOG 4-Pole VCF Port hamilton方法在KORG35和MOOG四极VCF非迭代稳定模拟中的应用

2021 24th International Conference on Digital Audio Effects (DAFx) Pub Date : 2021-09-08 DOI: 10.23919/DAFx51585.2021.9768301

M. Danish, S. Bilbao, M. Ducceschi

引用次数: 1

Air Absorption Filtering Method Based on Approximate Green's Function for Stokes' Equation 基于Stokes方程近似格林函数的空气吸收过滤方法

2021 24th International Conference on Digital Audio Effects (DAFx) Pub Date : 2021-09-08 DOI: 10.23919/DAFx51585.2021.9768289

B. Hamilton

{"title":"Air Absorption Filtering Method Based on Approximate Green's Function for Stokes' Equation","authors":"B. Hamilton","doi":"10.23919/DAFx51585.2021.9768289","DOIUrl":"https://doi.org/10.23919/DAFx51585.2021.9768289","url":null,"abstract":"Air absorption effects lead to significant attenuation in high frequencies over long distances and this is critical to model in wide-band virtual acoustic simulations. Air absorption is commonly modelled using filter banks applied to an impulse response or to individual impulse events (rays or image sources) arriving at a receiver. Such filter banks require non-trivial fitting to air absorption attenuation curves, as a function of time or distance, in the case of IIR approximations' or may suffer from overlap-add artefacts in the case of FIR approximations. In this study, a filter method is presented which avoids the aforementioned issues. The proposed approach relies on a time-varying diffusion kernel that is found in an approximate Green's function solution to Stokes' equation in free space. This kernel acts as a low-pass filter that is parametrised by physical constants, and can be applied to an impulse response using time-varying convolution. Numerical examples are presented demonstrating the utility of this approach for adding air absorption effects to room impulse responses simulated using geometrical acoustics or wave-based methods.","PeriodicalId":221170,"journal":{"name":"2021 24th International Conference on Digital Audio Effects (DAFx)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127989863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Practical Virtual Analog Modeling Using MÖbius Transforms 使用MÖbius变换的实用虚拟模拟建模

2021 24th International Conference on Digital Audio Effects (DAFx) Pub Date : 2021-09-08 DOI: 10.23919/DAFx51585.2021.9768245

François G. Germain

引用次数: 1

Dynamic Grids for Finite-Difference Schemes in Musical Instrument Simulations 乐器仿真中有限差分格式的动态网格

2021 24th International Conference on Digital Audio Effects (DAFx) Pub Date : 2021-09-08 DOI: 10.23919/DAFx51585.2021.9768302

S. Willemsen, S. Bilbao, M. Ducceschi, S. Serafin

引用次数: 2

Identification of Nonlinear Circuits as Port-Hamiltonian Systems 非线性电路作为port - hamilton系统的辨识

2021 24th International Conference on Digital Audio Effects (DAFx) Pub Date : 2021-09-08 DOI: 10.23919/DAFx51585.2021.9768224

Judy Najnudel, R. Müller, T. Hélie, David Roze

引用次数: 0

A Generative Model for Raw Audio Using Transformer Architectures 使用变压器架构的原始音频生成模型

2021 24th International Conference on Digital Audio Effects (DAFx) Pub Date : 2021-06-30 DOI: 10.23919/DAFx51585.2021.9768298

Prateek Verma, C. Chafe

{"title":"A Generative Model for Raw Audio Using Transformer Architectures","authors":"Prateek Verma, C. Chafe","doi":"10.23919/DAFx51585.2021.9768298","DOIUrl":"https://doi.org/10.23919/DAFx51585.2021.9768298","url":null,"abstract":"This paper proposes a novel way of doing audio synthesis at the waveform level using Transformer architectures. We propose a deep neural network for generating waveforms, similar to wavenet [1]. This is fully probabilistic, auto-regressive, and causal, i.e. each sample generated depends on only the previously observed samples. Our approach outperforms a widely used wavenet architecture by up to 9% on a similar dataset for predicting the next step. Using the attention mechanism, we enable the architecture to learn which audio samples are important for the prediction of the future sample. We show how causal transformer generative models can be used for raw waveform synthesis. We also show that this performance can be improved by another 2% by conditioning samples over a wider context. The flexibility of the current model to synthesize audio from latent representations suggests a large number of potential applications. The novel approach of using generative transformer architectures for raw audio synthesis is, however, still far away from generating any meaningful music similar to wavenet, without using latent codes/meta-data to aid the generation process.","PeriodicalId":221170,"journal":{"name":"2021 24th International Conference on Digital Audio Effects (DAFx)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124515877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 17

One Billion Audio Sounds from GPU-Enabled Modular Synthesis 十亿音频声音从gpu启用模块化合成

2021 24th International Conference on Digital Audio Effects (DAFx) Pub Date : 2021-04-27 DOI: 10.23919/DAFx51585.2021.9768246

Joseph P. Turian, Jordie Shier, G. Tzanetakis, K. McNally, Max Henry

引用次数: 15