Tag: audio processing

SRC – Sample Rate Converters in Digital Audio Processing – Theory and Practice – ADC 2024

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https://audio.dev/ -- @audiodevcon​
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SRC - Sample Rate Converters in Digital Audio Processing - Theory and Practice - Christian Gilli & Michele Mirabella - ADC 2024
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Sample Rate Conversion (SRC) is a key component of digital audio processing that lets you change how many samples per second are used to represent a stream. It is fundamental when you need to make audio from one system work with another that uses a different sample rate. Getting SRC right is crucial in lots of audio applications, particularly in environments where multiple audio devices coexist, each potentially functioning with its own clock frequency.
The importance of SRC stems from three main factors: 1) preventing pitch distortion; in fact, running an audio stream at an incorrect rate can alter pitch or the relative relationships between pitches. 2) Maintaining synchronization, i.e., ensuring different devices remain in step with one another and 3) compensating for clock drift by accounting for slight frequency variations between devices nominally operating at the same frequency.

This presentation will begin with an introduction to the fundamental principles of SRC.

The goal for this talk is to give attendees a comprehensive understanding of SRC's importance in audio processing.
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Slides: https://data.audio.dev/talks/2024/sample-rate-conversion/slides.pptx
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Christian Gilli

I'm a software engineer with 6+ years of experience working on high-performance implementations of DSP algorithms for audio applications in C++.

Right now, I spend most of my time working on writing high-performance numerical software for DSP applications on heterogeneous platforms.
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Michele Mirabella

Michele Mirabella received the B.S. degree (cum laude) in electronic engineering from the University of Modena and Reggio Emilia, Italy, in 2019, and the M.S. degree (cum laude) in electronic engineering from the University of Bologna in 2021. He is currently pursuing the Ph.D. degree with the University of Modena and Reggio Emilia, Italy. His main research interests lie in the area of joint communication and sensing systems.
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ADC is an annual event celebrating all audio development technologies, from music applications and game audio to audio processing and embedded systems. ADC’s mission is to help attendees acquire and develop new audio development skills, and build a network that will support their audio developer career.
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Streamed & Edited by Digital Medium Ltd: https://online.digital-medium.co.uk
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Organized and produced by JUCE: https://juce.com/
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Special thanks to the ADC24 Team:

Sophie Carus
Derek Heimlich
Andrew Kirk
Bobby Lombardi
Tom Poole
Ralph Richbourg
Jim Roper
Jonathan Roper
Prashant Mishra

#digitalaudio #cpp #adc #audiodev #dsp #audio #cppprogramming #audioprocessing #audioproduction #audioprogramming #musictech #soundtech #audiotech #audiotechnology

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Audio In, MIDI Out – Avrosh Kumar & Chris Latina – ADCx SF

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Join Us For ADC23 - London - 13-15 November 2023
More Info: https://audio.dev/
@audiodevcon

Audio In, MIDI Out - Avrosh Kumar & Chris Latina - ADCx SF

Audio plugins enable musicians to apply effects to audio tracks, synthesize sounds through virtual instruments, and even transform MIDI events using MIDI effects. Mixing and mastering engineers also make use of analyzers and mastering plugins that can extract instantaneous and statistical information about the audio track to help guide the mixing process. As plugin developers, we can tinker with audio and MIDI data in several ways to augment musicians’ creative workflows.

In this talk, we will explore a special case of such plugin implementations and generate MIDI output using audio as input. This can be achieved by performing real-time content analysis on an audio track, and produce control signals as MIDI events that represent high-level features extracted from audio. These MIDI events can then be used to trigger or modulate external parameters and engines.

Audio-to-MIDI capability is already natively supported by some DAWs. They convert the melodic contents of audio to its MIDI representation and is even used by some plugins for real-time voice-to-pitch conversion. MIDI is not only a format to represent melodies and harmonies but, is excellent for producing annotated events and control signals using program and control change (CC) messages. We will leverage this in our Audio-to-MIDI plugins to potentailly create controlled chaos (think Buchla).

Slides: https://data.audio.dev/talks/ADCxSF/2023/audio-in-midi-out/slides.pdf
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Avrosh Kumar

Speech Research Engineer @ Pindrop
Plugin Developer, Music Tech Enthusiast

Chris Latina

As a sonic explorer melding hybrid hardware and software mediums, Christopher Latina works at the crossroads of engineering, design and music composition to create immersive environments.

Edited by Digital Medium Ltd - online.digital-medium.co.uk
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Organized and produced by JUCE: https://juce.com/
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Special thanks to the ADC Team:

Sophie Carus
Derek Heimlich
Andrew Kirk
Bobby Lombardi
Tom Poole
Ralph Richbourg
Jim Roper
Jonathan Roper

#audiodevcon #audiodev #midi

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Musical Sound Coding for Cochlear Implants – Shaikat Hossain – ADCx SF

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Join Us For ADC23 - London - 13-15 November 2023
More Info: https://audio.dev/
@audiodevcon

Musical Sound Coding for Cochlear Implants - Shaikat Hossain - ADCx SF

This presentation will provide an introduction to how cochlear implant (CI) devices work, delve into their signal processing which is based on the channel vocoder, and explore some of the limitations of contemporary CI sound coding strategies. This presentation will explore some possible approaches to improve sound coding to facilitate better music perception for CI users. Code and audio vocoder examples will be presented which simulate how CI sound processing might sound like.

Slides: musical-sound-coding-for-cochlear-implants/slides.pdf
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Shaikat Hossain

Shaikat has worked on research in the area of psychoacoustics and improving sound coding for cochlear implant users. He also works on spatial audio for music.

Edited by Digital Medium Ltd - online.digital-medium.co.uk
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Organized and produced by JUCE: https://juce.com/
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Special thanks to the ADC Team:

Sophie Carus
Derek Heimlich
Andrew Kirk
Bobby Lombardi
Tom Poole
Ralph Richbourg
Jim Roper
Jonathan Roper

#audiodevcon #audiodev #cochlearimplant

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High-Level Programming of FPGAs for Audio Real-Time Signal Processing Applications – Romain Michon

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Join Us For ADC23 - London - 13-15 November 2023
More Info: https://audio.dev/
@audiodevcon

High-Level Programming of FPGAs for Audio Real-Time Signal Processing Applications - Romain Michon

Field Programmable Gate Arrays (FPGAs) are notoriously hard to program, however they present significant advantages over other types of processors for real-time audio signal processing applications. In particular, they offer unparalleled performances in terms of latency, computational power, they can process very large numbers of audio channels in parallel, and run at a very high sampling rate (+10MHz). During this presentation, we'll give an overview of the opensource SyFaLa toolchain which allows for the programming of Xilinx FPGAs with the Faust programming language. We'll also present various applications focusing on different aspects of the potential offered by FPGAs in the context of audio applications: spatial audio, high sampling rate computing, active control of room acoustics, etc.

Slides: https://data.audio.dev/talks/ADCxSF/high-level-programming-of-fpgas/slides.pdf
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Romain Michon

Romain Michon is faculty researcher at INRIA (Emeraude Team), associate professor at INSA Lyon, associate researcher at GRAME -- Centre National de Création Musicale in Lyon (France), and lecturer at the Center for Computer Research in Music and Acoustics (CCRMA) at Stanford University (USA). He has been involved in the development of the Faust programming language since 2008 and he's now part of the core Faust development team at GRAME. He's currently leading (PI) the FAST project (https://fast.grame.fr) which aims at (i) facilitating the programming of FPGAs (Field-Programmable Gate Array) in the context of real-time audio signal processing and (ii) exploring the use of this type of platform for the active control of room acoustics. Romain's research interests also involve embedded systems for real-time audio processing, Human Computer Interaction (HCI), New Interfaces for Musical Expression (NIME), and physical modeling of musical instruments.

Maxime Popoff

Maxime Popoff is a PhD candidate at INSA Lyon (Institut National des Sciences Appliquées), specialized in electronic and embedded systems. He studied at Grenoble-INP and worked as an engineer at the CEA Grenoble and then at Inria where he joined the Emeraude team (INSA Lyon, Inria, GRAME) in 2020. His research work focuses on embedded audio platforms and their programming.

Edited by Digital Medium Ltd - online.digital-medium.co.uk
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Organized and produced by JUCE: https://juce.com/
_

Special thanks to the ADC Team:

Sophie Carus
Derek Heimlich
Andrew Kirk
Bobby Lombardi
Tom Poole
Ralph Richbourg
Jim Roper
Jonathan Roper

#audiodevcon #audiodev #logging

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