Tag: dsp

Snapshot Testing for Audio DSP – A Picture’s Worth a 1000 Tests – Josip Cavar – ADC 2024

https://audio.dev/ -- @audiodevcon​
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Snapshot Testing for Audio DSP - A Picture’s Worth a 1000 Tests - Josip Cavar - ADC 2024
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Typical tools for testing DSP algorithms often fall short when it comes to describing complex outputs. Articulating expected behavior concisely and elegantly is challenging, and maintaining such test cases over the long term can be difficult.

As a result, we often resort to manual or semi-automated testing strategies.

This talk will present an alternative testing technique that offers a convenient and automated solution for testing audio code. By using audio waveforms, we can easily generate and test the results of DSP algorithms, ensuring safety when refactoring audio code.
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Slides: https://data.audio.dev/talks/2024/snapshot-testing-for-audio-dsp/slides.pdf
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Josip Cavar

Josip is an experienced programmer with over a decade of programming experience. He has recently developed a passion for audio and has been dedicated to this field for the past few years.

He finds joy in debugging, creating application architecture, testing, and reverse engineering.

Josip enjoys documenting his experiences on the Infinium blog, sharing insights with other programmers.
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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.
Annual ADC Conference - https://audio.dev/
https://www.linkedin.com/company/audiodevcon

https://facebook.com/audiodevcon
https://instagram.com/audiodevcon
https://www.reddit.com/r/audiodevcon/
https://mastodon.social/@audiodevcon
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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

#adc #audiodev #dsp #audio #swiftprogramming #audioprocessing #audioproduction #audioprogramming #sound #music #musictech #soundtech #audiotech #audiotechnology

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How To Read Scientific DSP Publications and Turn Them Into Code – Matthijs Hollemans – ADC 2024

https://audio.dev/ -- @audiodevcon​
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How To Read Scientific DSP Publications and Turn Them Into Code - Making Sense of Academic Papers and Patents for People Who Are Not Academics or Patent Lawyers - Matthijs Hollemans - ADC 2024
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Academic research papers contain exciting new ideas but typically no ready-to-use source code. Papers are not written for the layperson and are often filled with jargon and inscrutable equations. It's up to the reader to decipher the math and wrestle through dense theory to transform these ideas into C++ code. This can be a daunting task, especially for developers who do not have an academic or mathematics background. Patents, in particular expired ones, are also a great source of ideas and are even harder to untangle! Fortunately, with a little effort you can learn to read these perplexing documents and extract their secrets. This talk aims to bridge the gap between theory and practice and will show useful techniques for quickly making sense of scientific publications and patents, so that you can finally start turning them into code.
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Slides: https://data.audio.dev/talks/2024/how-to-read-scientific-dsp-code/slides.pdf
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Matthijs Hollemans

Matthijs is an independent audio developer working on freelance projects as well as his own portfolio of plug-ins. He is also the author of the books The Complete Beginner's Guide to Audio Plug-in Development and Creating Synthesizer Plug-Ins with C++ and JUCE, both published by The Audio Programmer. Matthijs also writes about audio development on his blog. Previously, Matthijs worked as a game developer, iOS developer and machine learning engineer. He has written books on all these topics. Matthijs spends too much of his spare time chatting about audio development online and has no time left to practice playing the piano.
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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.
Annual ADC Conference - https://audio.dev/
https://www.linkedin.com/company/audiodevcon
https://twitter.com/audiodevcon
https://facebook.com/audiodevcon
https://instagram.com/audiodevcon
https://www.reddit.com/r/audiodevcon/
https://mastodon.social/@audiodevcon
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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

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

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Deep Learning for DSP Engineers: Challenges & Tricks for Audio AI – Franco Caspe & Andrea Martelloni

https://audio.dev/ -- @audiodevcon​

Deep Learning for DSP Engineers: Challenges and Tricks for Audio AI - Franco Caspe & Andrea Martelloni - ADC23

This talk aims to tackle and demystify the process of the development of an AI-based musical instrument, audio tool or effect. We want to view this process not from the point of view of technical frameworks and technical challenges, but from that of the design process, the knowledge required and the learning curve needed to be productive with AI tools; particularly if one approaches AI from an audio DSP background, which was our situation when we started out.

We are going to quickly survey the current applications of AI for real-time music making, and reflect on the challenges that we found, especially with current learning resources. We will then walk through the process of developing a real-time audio model based on deep learning, from dataset to deployment, highlighting the relevant aspects for those with a DSP background. Finally, we will describe how we applied that process to our own PhD projects, the HITar and the Bessel’s Trick.

Link to Slides:
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Franco Caspe

I’m an electronic engineer, a maker, hobbyist musician and a PhD Student at the Artificial Intelligence and Music CDT at Queen Mary University of London. I have experience in development of real-time systems for applications such as communication, neural network inference, and DSP. I play guitar and I love sound design, so in my PhD I set out to find ways to bridge the gap that separates acoustic instruments and synthesizers, using AI as an analysis tool for capturing performance features present in the instruments’ audio, and as a generation tool for synthetic sound rendering.
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Andrea Martelloni

Inventor of the HITar. Interested in applications of deep learning for rich real-time musical interaction and expressive digital musical instruments.
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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 ADC23 Team:

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

#adc #dsp #audio #ai #deeplearning

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Implementation of an IIR Antiderivative Anti-Aliasing Wavetable Oscillator – Maxime Coutant – ADC23

https://audio.dev/ -- @audiodevcon​

Implementation of an IIR Antiderivative Anti-Aliasing Wavetable Oscillator - Maxime Coutant - ADC 2023

Anti-aliasing is a crucial consideration for digital audio synthesis. Usually, for an oscillator, techniques like band-limited signals or oversampling are employed to mitigate this problem, but I investigated a method a bit more recent : Antiderivative Anti-Aliasing (ADAA). My search for a practical ADAA application in wavetable synthesis first yielded limited results. However, a paper titled "Antiderivative Antialiasing for Arbitrary Waveform Generation," published in August 2022, caught my attention.

The presentation will focus on three aspects:

• An Introduction to ADAA and the algorithm itself
• Insights into practical implementation and results
• Reflections on engaging with Academic Research

By the end of the talk the listener will know about the pros and cons of this technique and how and when to employ it. Furthermore, we will have illustrated some challenges of working with academic material as a software developer.

Link to Slides: https://docs.google.com/presentation/d/1mx8f7yxXMLxQ-pl3IcoqLkcZtQGd7z6gOidcQMAfxPc/edit
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Maxime Coutant

I'm an audio software engineer in the ADASP group, part of the LTCI public laboratory. Audio enthusiast, hobbyist musician and software addict, I love to share, learn and meet new people! Here at ADC23 I'll present a project I spent many hours on during this last year, hoping to lower the bridge between research and engineering!
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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 ADC23 Team:

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

#adc #audiodev #dsp #audio #softwareengineering #digitalaudio

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Creating Ubiquitous, Composable, Performant DSP Modules – Stefano D’Angelo – ADC23

Join Us For ADC24 - Bristol - 11-13 November 2024
More Info: https://audio.dev/
@audiodevcon​

Creating Ubiquitous, Composable, Performant DSP Modules - Stefano D’Angelo - ADC23

Companies and independent developers don't restart from scratch at each new project. They rely on a reusable technological base and build their final products upon that. For most software development tasks it is absolutely normal to use libraries developed by external suppliers, but for a number of very specific reasons this is less common when it comes to music DSP.

In a way, this is the sequel to my previous ADC talk. I'll show how my company, following my own advice, managed to create a toolkit of actually (re)usable music DSP algorithms while featuring unprecedented levels of ubiquity, composability, and performance.

In this talk I'll describe the cultural, architectural, and technical challenges we faced and the solutions we adopted in detail, especially with respect to:
• choice of DSP algorithms
• inadequacies and limitations of general-purpose programming languages
• minimizing reliance on programming language and target platform features
• designing consistent, performant, and unopinionated APIs
• running identical code on all platforms, from microcontrollers to the web, including desktop and mobile
• integration with external tools

Link to Slides:
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Stefano D'Angelo

I am a music DSP researcher and engineer, as well as the founder and CEO of Orastron. I help companies around the world, such as Arturia, Neural DSP, Darkglass Electronics, and Elk, in creating technically-demanding digital synthesizers and effects. I also strive to push audio technology forward through scientific research and experimental projects.
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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 ADC23 Team:

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

#adc #audiotech #dsp #dspmusic

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Unlock Your Audio Processing Superpowers With Rest API – Baptiste Vericel & Alexandre Louiset – ADC23

https://audio.dev/ -- @audiodevcon​

Unlock Your Audio Processing Superpowers With Rest API - Baptiste Vericel & Alexandre Louiset - ADC 2023

For any audio feature you need to implement in your product, API integration will grant you limitless capabilities, with numerous advantages (low code, fast deployment, scalable). During this talk we'll highlight the key concepts of Rest APIs for audio processing, its relevancy and benefits for any type of audio software and app development workflows, through a groundbreaking demo, showcasing best-in-class technologies straight from IRCAM lab we’re aiming at making accessible.
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Baptiste Vericel

With a background in acoustics and signal processing (ENSEA, IRCAM), he has worked with a number of companies (Arkamys, Devialet) for more than a decade as a signal processing and electroacoustics engineer. Passionate about audio and live music, he set up his own podcasting company.
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Alexandre Louiset

Alexandre is on a mission to make the IRCAM sound research technology resonate and unlock new territories for the pro audio community.
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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 ADC23 Team:

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

#adc #audiodev #dsp #audio

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Singing Synthesis Beyond Human-Level Naturalness: Not What You Think – Kanru Hua – ADC23

https://audio.dev/ -- @audiodevcon​

Singing Synthesis Beyond Human-Level Naturalness: Not What You Think - Kanru Hua - ADC 2023

Achieving human-level naturalness is often viewed as the pinnacle of vocal synthesis research. While recent advances in Text-to-Speech (TTS) using deep generative models has reported subjective ratings comparable to human speech, singing synthesis hasn't reached this milestone. In this presentation, we showcase a singing synthesis system that, intriguingly, exceeds raw recordings in comparative mean opinion score tests—with statistical significance. However, as we delve deeper, we highlight the subtle but crucial differences between true human parity and competitive ratings in subjective tests, challenging our understanding of “naturalness” in this domain. We will also unpack the complexities of subjective quality evaluation, the unique challenges posed by singing versus speech, and shed light on the implications these findings hold for future designs of singing synthesis systems.

Link to Slides:
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Kanru Hua

Kanru Hua founded Dreamtonics (developer of Synthesizer V) in 2019, after dropping out of University of Illinois. A self-taught programmer and researcher, Kanru has been focusing on bridging speech signal processing algorithms with the latest advances in generative models, as well as addressing the production challenges of deploying neural networks for audio processing. He was nominated for Forbes JAPAN 30 UNDER 30 in 2022.
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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 ADC23 Team:

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

#adc #audiodev #dsp #audio #audiotech

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Aliasing and Oversampling for DSP Engineers – Sam Fischmann – ADC23

https://audio.dev/ -- @audiodevcon​

Aliasing and Oversampling for DSP Engineers - Sam Fischmann - ADC 2023

Aliasing distortion and oversampling have become especially popular discussion topics in the wake of widely-available consumer analysis tools such as Plugin Doctor. In response, audio software users have been more vocal about aliasing, in many cases asking audio developers to provide oversampling.

As it turns out, not all oversampling is the same, we face several trade-offs when implementing it, and we don’t always need it. This talk aims to help you understand aliasing distortion, how oversampling addresses it, and some potential downsides of overuse. It also provides guidelines to help you decide when oversampling is necessary, what kind of oversampling to use, and mentions some open-source libraries that give you flexibility to make the right decision for your software.
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Sam Fischmann

Sam is a seasoned developer and composer, with experience spanning Web, embedded, and desktop systems. He founded Musik Hack with Stan Greene to release products that are easy to use without sacrificing quality or creative control. In the process, he learned that not only does he love making audio software, he loves teaching it! You can find him talking with White Sea Studios, Bobby Owsinski, Help me Devvon, or pretty much anybody that wants to have an interesting and engaging conversation.
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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 ADC23 Team:

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

#adc #audiodev #dsp #audio

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Workshop: An Introduction to Inclusive Design of Audio Products – Accessibility Panel – ADC23

Join Us For ADC24 - Bristol - 11-13 November 2024
More Info: https://audio.dev/
@audiodevcon​

Workshop: An Introduction to Inclusive Design of Audio Products - Accessibility Panel - ADC 2023

As the audio industry seeks to improve diversity within its workforce, and the music industry seeks to widen the diversity of artists creating music, it is essential that the inclusion becomes woven into the design of the tools available.

But what do terms such as accessibility and inclusive design actually mean?
How might you begin to adopt inclusive design practices so that your software becomes accessible to a wider audience?
What are some of the big-name audio companies doing to support accessibility and how can you learn from their experience?
How can companies take practical steps, together, to act on a shared desire for a more inclusive industry?

These are the kind of questions that this workshop seeks to answer.

Workshop outline

The format of the workshop will be as follows:

1. Introductions and updates from panellists, sharing insight into their companies' recent and future work on accessibility (45 mins).
2. Pre-recorded updates shining a light on other accessibility-related projects from across the industry (20 mins).
3. An overview of accessible GUI design in JUCE (30 mins) – Harry Morley (Focusrite). Harry will:
• Tour the Focusrite Control 2 software to introduce the common accessibility-related terminology.
• Share his experience of working on Focusrite’s Scarlett and Vocaster software, using the JUCE toolkit to make this software accessible to screen reader users.
• Explain key concepts such as screen reader focus and keyboard focus, control grouping, and focus priority order.
• Share useful learnings and tips for working with JUCE, and other things to be aware of.
• Suggest approaches to testing accessibility directly, working with visually impaired beta testers, and collaborating with the user community.
4. Panel discussion: a collaborative approach to inclusive design in audio products (30 mins).
• How do we make the most of the shared desire for an industry that is more inclusive to disabled engineers and artists?
• A look into the MIDI Association’s proposed ‘Music Accessibility Standard’ so far, and more.
5. Roundtable discussion in response to audience Q&A. Attendees can contribute in person, or via Zoom Q&A or Discord. If you encounter barriers to accessing these platforms, please send questions to: [email protected]

Panellists

Speaking in person
• Jay Pocknell (RNIB)
• Harry Morley (Focusrite)
• Tom Poole (JUCE)
• Adil Ghanty (Native Instruments)
• Scott Chesworth (Freelance Accessibility Consultant and Trainer)
• Martin Keary (Muse Group)
• Arvid Johnsson (Softube)

Joining remotely
• Athan Billias (MIDI Association)
• Adi Dickens (Ableton)
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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 ADC23 Team:

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

#adc #audiodesign #dsp #audio #juce

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AudioworX: A Framework for Streamlining Development of Audio Post Processing for Car Audio Systems

Join Us For ADC24 - Bristol - 11-13 November 2024
More Info: https://audio.dev/
@audiodevcon​

AudioworX: A Single Framework for Streamlining Development of Audio Post Processing for Car Audio Systems - Ravish Sreepada Hegde & Harish Venkatesan - ADCx India 2024

AudioworX is an audio design framework that provides a common, intuitive and flexible audio processing development tool. It includes Framework for audio algorithm development, Tuning tool to tune the algorithms to meet acoustic requirements, Measurement module to measure car acoustics and simulation environment. AudioworX is used by HARMAN internal teams, sub-component suppliers, and OEM customers to overcome inherent development, consistency, and time-to-market inefficiencies of bringing audio software products to market, mainly in the car audio industry. In this talk, we will be highlighting some key features of AudioworX which includes audio framework , post processing flow designer, measurement module & simulation tool and how they are interfaced and used.`

Link to Slides: https://data.audio.dev/talks/ADCxIndia/2024/harman-audioworx.pdf
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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 ADC24 Team:

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

#adc #dsp #audio #audioprocessing #audiotech

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