Filter-based alias reduction for digital classical waveform synthesis

Pekonen, Jussi; Vdlimdki, V.

doi:10.1109/icassp.2008.4517564

Cited by 7 publications

(3 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Subtractive synthesis was the main technique featured in the early music synthesizers [51]. Subtractive synthesis is also a popular approach for generating naturally occurring sound textures such as rain, wind and fire, e.g., [10,52], because important characteristics of such rich signals can be captured by a carefully filtered noise source.…”

Section: Subtractive Synthesismentioning

confidence: 99%

The State of the Art in Procedural Audio

Menexopoulos,

Pestana,

Reiss

2023

J. Audio Eng. Soc.

View full text Add to dashboard Cite

Procedural audio may be defined as real-time sound generation according to programmatic rules and live input. It is often considered a subset of sound synthesis and is especially applicable to nonlinear media, such as video games, virtual reality experiences and interactive audiovisual installations. However, there is resistance to widespread adoption of procedural audio because there is little awareness of the state of the art, including the diversity of sounds that may be generated, the controllability of procedural audio models, and the quality of the sounds that it produces. The authors address all of these aspects in this review paper, while attempting a largescale categorization of sounds that have been approached through procedural audio techniques. The role of recent advancements in neural audio synthesis, its current implementations, and potential future applications in the field are also discussed. Review materials are available * .

show abstract

Section: Subtractive Synthesismentioning

confidence: 99%

The State of the Art in Procedural Audio

Menexopoulos,

Pestana,

Reiss

2023

J. Audio Eng. Soc.

View full text Add to dashboard Cite

show abstract

“…29 The aliasing has been shown to be reduced also by highpass and comb filtering the alias-corrupted signals. 30 Stilson and Smith suggested in 1996 an approach that is based on bandlimiting the derivative of the waveform. 31 By bandlimiting the waveform derivative, i.e., by replacing each lone impulse, the derivative of a waveform discontinuity, with the impulse response of a lowpass filter, and by applying integration to the resulting bandlimited impulse train (BLIT), an approximately bandlimited waveform is obtained.…”

Section: Introductionmentioning

confidence: 99%

Perceptually informed synthesis of bandlimited classical waveforms using integrated polynomial interpolation

Välimäki

Pekonen

Nam

2012

The Journal of the Acoustical Society of America

Self Cite

View full text Add to dashboard Cite

Digital subtractive synthesis is a popular music synthesis method, which requires oscillators that are aliasing-free in a perceptual sense. It is a research challenge to find computationally efficient waveform generation algorithms that produce similar-sounding signals to analog music synthesizers but which are free from audible aliasing. A technique for approximately bandlimited waveform generation is considered that is based on a polynomial correction function, which is defined as the difference of a non-bandlimited step function and a polynomial approximation of the ideal bandlimited step function. It is shown that the ideal bandlimited step function is equivalent to the sine integral, and that integrated polynomial interpolation methods can successfully approximate it. Integrated Lagrange interpolation and B-spline basis functions are considered for polynomial approximation. The polynomial correction function can be added onto samples around each discontinuity in a non-bandlimited waveform to suppress aliasing. Comparison against previously known methods shows that the proposed technique yields the best tradeoff between computational cost and sound quality. The superior method amongst those considered in this study is the integrated third-order B-spline correction function, which offers perceptually aliasing-free sawtooth emulation up to the fundamental frequency of 7.8 kHz at the sample rate of 44.1 kHz.

show abstract

“…However, many audio professionals argue that common DAFx lack warmth and emotional content with respect to their analog counterparts, and thus they still prefer to rely on analog devices. Among the different typologies of DAFx, Virtual Analog (VA) modeling techniques [2] are gaining resounding success among musicians since they pursue the digital emulation of existing analog audio gear, sparing them the drawbacks of buying heavy and bulky analog equipment.…”

Section: Introductionmentioning

confidence: 99%

Parallel Wave Digital Filter Implementations of Audio Circuits with Multiple Nonlinearities

Giampiccolo¹,

Natoli²,

Bernardini³

et al. 2022

J. Audio Eng. Soc.

View full text Add to dashboard Cite

Modern audio systems and musical effects feature multi-core processing units. The development of parallel audio processing algorithms capable of exploiting the architecture of such hardware is thus in order. In this paper, we present a parallel version of the Hierarchical Scattering Iterative Method (HSIM), a technique based on Wave Digital Filter principles recently proposed for the emulation of multiphysics audio circuits containing multiple nonlinear oneports and nonlinear transformers. HSIM operates in a modular fashion, and it is characterized by a high number of embarrassingly parallelizable operations, making it a good candidate for parallel execution. After analyzing HSIM from the parallel computing perspective, we propose three different strategies for the distribution of HSIM workload among threads of execution, and we show how to compute the maximum achievable speedup. The emulation of a possible output stage of a vacuum-tube guitar amplifier is considered, and a performance comparison between parallel and serial implementations of HSIM is presented, pointing out a speedup of nearly 30%. The proposed method proves thus to be promising for Virtual Analog modeling applications, leading the way towards the parallel digital emulation of increasingly complex audio circuits.

show abstract

Filter-based alias reduction for digital classical waveform synthesis

Cited by 7 publications

References 7 publications

The State of the Art in Procedural Audio

The State of the Art in Procedural Audio

Perceptually informed synthesis of bandlimited classical waveforms using integrated polynomial interpolation

Parallel Wave Digital Filter Implementations of Audio Circuits with Multiple Nonlinearities

Contact Info

Product

Resources

About