A Low-Latency Quasi-Linear-Phase Octave Graphic Equalizer

Valeria Bruschi; Vesa Välimäki; Juho Liski; Stefania Cecchi

A Low-Latency Quasi-Linear-Phase Octave Graphic Equalizer

Valeria Bruschi, Vesa Välimäki, Juho Liski, Stefania Cecchi

Audio Signal Processing

Università Politecnica delle Marche

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

74 Downloads (Pure)

Abstract

This paper proposes a low-latency quasi-linear-phase octave graphic equalizer. The structure is derived from a recent linear-phase graphic equalizer based on interpolated finite impulse response (IFIR) filters. The proposed system reduces the total latency of the previous equalizer by implementing a hybrid structure. An infinite impulse response (IIR) shelving filter is used in the structure to implement the first band of the equalizer, whereas the rest of the band filters are realized with the linear-phase FIR structure. The introduction of the IIR filter causes a nonlinear phase response in the low frequencies, but the total latency is reduced by 50% in comparison to the linear-phase equalizer. The proposed graphic equalizer is useful in real-time audio processing, where only little latency is tolerated.

Original language	English
Title of host publication	Proceedings of the 25th International Conference on Digital Audio Effects (DAFx20in22)
Editors	Gianpaolo Evangelista, Nicki Holighaus
Place of Publication	Vienna, Austria
Publisher	DAFx
Pages	94-100
Number of pages	7
Edition	2022
ISBN (Print)	978-3-200-08599-2
Publication status	Published - 6 Sept 2022
MoE publication type	A4 Conference publication
Event	International Conference on Digital Audio Effects - University of Music and Performing Arts Vienna, Vienna, Austria Duration: 7 Sept 2022 → 9 Sept 2022 Conference number: 25 https://dafx2020.mdw.ac.at/DAFx20in22/ https://dafx2020.mdw.ac.at/DAFx20in22/index.html

Publication series

Name	Proceedings of the International Conference on Digital Audio Effects
ISSN (Print)	2413-6700
ISSN (Electronic)	2413-6689

Conference

Conference	International Conference on Digital Audio Effects
Abbreviated title	DAFx
Country/Territory	Austria
City	Vienna
Period	07/09/2022 → 09/09/2022
Internet address	https://dafx2020.mdw.ac.at/DAFx20in22/ https://dafx2020.mdw.ac.at/DAFx20in22/index.html

Keywords

Audio signal processing
Digital signal processing
equalization
filter design

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

DAFx20in22_paper_32
This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, adaptation, and reproduction in any medium, provided the original author and source are credited.
Final published version, 1.65 MBLicence: CC BY

https://dafx2020.mdw.ac.at/proceedings/papers/DAFx20in22_paper_32.pdfLicence: CC BY

Cite this

Bruschi, V., Välimäki, V., Liski, J., & Cecchi, S. (2022). A Low-Latency Quasi-Linear-Phase Octave Graphic Equalizer. In G. Evangelista, & N. Holighaus (Eds.), Proceedings of the 25th International Conference on Digital Audio Effects (DAFx20in22) (2022 ed., pp. 94-100). Article 32 (Proceedings of the International Conference on Digital Audio Effects). DAFx . https://dafx2020.mdw.ac.at/proceedings/papers/DAFx20in22_paper_32.pdf

Bruschi, Valeria ; Välimäki, Vesa ; Liski, Juho et al. / A Low-Latency Quasi-Linear-Phase Octave Graphic Equalizer. Proceedings of the 25th International Conference on Digital Audio Effects (DAFx20in22). editor / Gianpaolo Evangelista ; Nicki Holighaus. 2022. ed. Vienna, Austria : DAFx , 2022. pp. 94-100 (Proceedings of the International Conference on Digital Audio Effects).

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title = "A Low-Latency Quasi-Linear-Phase Octave Graphic Equalizer",

abstract = "This paper proposes a low-latency quasi-linear-phase octave graphic equalizer. The structure is derived from a recent linear-phase graphic equalizer based on interpolated finite impulse response (IFIR) filters. The proposed system reduces the total latency of the previous equalizer by implementing a hybrid structure. An infinite impulse response (IIR) shelving filter is used in the structure to implement the first band of the equalizer, whereas the rest of the band filters are realized with the linear-phase FIR structure. The introduction of the IIR filter causes a nonlinear phase response in the low frequencies, but the total latency is reduced by 50% in comparison to the linear-phase equalizer. The proposed graphic equalizer is useful in real-time audio processing, where only little latency is tolerated.",

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author = "Valeria Bruschi and Vesa V{\"a}lim{\"a}ki and Juho Liski and Stefania Cecchi",

year = "2022",

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isbn = "978-3-200-08599-2",

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booktitle = "Proceedings of the 25th International Conference on Digital Audio Effects (DAFx20in22)",

address = "Austria",

edition = "2022",

note = "International Conference on Digital Audio Effects, DAFx ; Conference date: 07-09-2022 Through 09-09-2022",

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Bruschi, V, Välimäki, V, Liski, J & Cecchi, S 2022, A Low-Latency Quasi-Linear-Phase Octave Graphic Equalizer. in G Evangelista & N Holighaus (eds), Proceedings of the 25th International Conference on Digital Audio Effects (DAFx20in22). 2022 edn, 32, Proceedings of the International Conference on Digital Audio Effects, DAFx , Vienna, Austria, pp. 94-100, International Conference on Digital Audio Effects, Vienna, Austria, 07/09/2022. <https://dafx2020.mdw.ac.at/proceedings/papers/DAFx20in22_paper_32.pdf>

A Low-Latency Quasi-Linear-Phase Octave Graphic Equalizer. / Bruschi, Valeria; Välimäki, Vesa; Liski, Juho et al.
Proceedings of the 25th International Conference on Digital Audio Effects (DAFx20in22). ed. / Gianpaolo Evangelista; Nicki Holighaus. 2022. ed. Vienna, Austria: DAFx , 2022. p. 94-100 32 (Proceedings of the International Conference on Digital Audio Effects).

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - A Low-Latency Quasi-Linear-Phase Octave Graphic Equalizer

AU - Bruschi, Valeria

AU - Välimäki, Vesa

AU - Liski, Juho

AU - Cecchi, Stefania

N1 - Conference code: 25

PY - 2022/9/6

Y1 - 2022/9/6

N2 - This paper proposes a low-latency quasi-linear-phase octave graphic equalizer. The structure is derived from a recent linear-phase graphic equalizer based on interpolated finite impulse response (IFIR) filters. The proposed system reduces the total latency of the previous equalizer by implementing a hybrid structure. An infinite impulse response (IIR) shelving filter is used in the structure to implement the first band of the equalizer, whereas the rest of the band filters are realized with the linear-phase FIR structure. The introduction of the IIR filter causes a nonlinear phase response in the low frequencies, but the total latency is reduced by 50% in comparison to the linear-phase equalizer. The proposed graphic equalizer is useful in real-time audio processing, where only little latency is tolerated.

AB - This paper proposes a low-latency quasi-linear-phase octave graphic equalizer. The structure is derived from a recent linear-phase graphic equalizer based on interpolated finite impulse response (IFIR) filters. The proposed system reduces the total latency of the previous equalizer by implementing a hybrid structure. An infinite impulse response (IIR) shelving filter is used in the structure to implement the first band of the equalizer, whereas the rest of the band filters are realized with the linear-phase FIR structure. The introduction of the IIR filter causes a nonlinear phase response in the low frequencies, but the total latency is reduced by 50% in comparison to the linear-phase equalizer. The proposed graphic equalizer is useful in real-time audio processing, where only little latency is tolerated.

KW - Audio signal processing

KW - Digital signal processing

KW - equalization

KW - filter design

UR - https://dafx2020.mdw.ac.at/

M3 - Conference article in proceedings

SN - 978-3-200-08599-2

T3 - Proceedings of the International Conference on Digital Audio Effects

SP - 94

EP - 100

BT - Proceedings of the 25th International Conference on Digital Audio Effects (DAFx20in22)

A2 - Evangelista, Gianpaolo

A2 - Holighaus, Nicki

PB - DAFx

CY - Vienna, Austria

T2 - International Conference on Digital Audio Effects

Y2 - 7 September 2022 through 9 September 2022

ER -

A Low-Latency Quasi-Linear-Phase Octave Graphic Equalizer

Abstract

Publication series

Conference

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

NordicSMC: Nordic Sound and Music Computing Network

Aalto Acoustics Lab

Valeria Bruschi

Cite this

A Low-Latency Quasi-Linear-Phase Octave Graphic Equalizer

Abstract

Publication series

Conference

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Projects

NordicSMC: Nordic Sound and Music Computing Network

Equipment

Aalto Acoustics Lab

Activities

Valeria Bruschi

Cite this