TX/RX Part 2 - AI Audio on the Raspberry Pi - Kieran Coulter - ADC Japan 2026
---
This talk is a continuation of previous talks at ADC'21 and ADCx'23. We will take an in-depth look at deploying AI Audio Inference workloads to the Raspberry Pi 5. The RPi 5 can be a useful target in and of itself, and also a reference target for later deployment to other embedded platforms (Compute Module 5, Qualcomm, etc.). This talk will have a particular focus on workloads that are useful in the automotive industry.
---
Kieran Coulter
Kieran holds a Bachelor of Music from the University of Ottawa and a Bachelor of Computer Science from the University of British Columbia.
He has worked for the past 12 years in a variety of roles in the audio software industry, developing specializations in spatial audio, voice processing, and embedded.
---
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://audio.dev/ -- @audiodevcon
ADCx Copenhagen - 28th April
ADC Bristol - 9th - 11th November
Hacking Handhelds for Creative Audio - Building Music Applications for the New Nintendo 3DS - Leonardo Foletto - ADC 2025
---
This presentation investigates the unique challenges and opportunities inherent in developing music software on unconventional, discontinued handheld hardware. We'll begin by examining how the technical and creative constraints of mediums like the 8-bit Game Boy fostered musical creativity.
The focus then shifts to more recently discontinued hardware: the New Nintendo 3DS which significantly expands creative possibilities beyond earlier handhelds.
The session will detail the methodologies for establishing a custom development environment on the N3DS and leveraging its hardware for real-time sound synthesis, sampling, and processing in the context of a custom groovebox application. The objective is to demonstrate the untapped creative and technical potential of accessible, non-traditional platforms for audio development.
---
Leonardo Foletto is an independent audio software developer, live coding musician, and hardware hacker. His past work encompasses a wide spectrum of audio and music applications, from Digital Audio Workstations and audio plugins to music machine learning, automotive audio, and multimedia performance software.
---
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
Pipewire: The How, What and Why of Audio on (Embedded) Linux - Daniel Strübig - ADC 2024
---
Understanding the audio ecosystem on Linux is not straight-forward.
Alsa, who? Pulse-audio, what? And what is this Pipewire everyone keeps talking about?
In this presentation, we want to provide a brief overview of the audio subsystem on Linux, looking at libraries provided by the kernel and how to work with it when writing user-space applications. Our goal is to clarify some of the confusion around the different libraries and tools and empower people to embrace the ecosystem instead of being intimidated by it.
Lastly, we would like to give a hands-on introduction to Pipewire, a new audio server shipped in many Linux distributions. We will cover how Pipewire works and how we use it professionally on our embedded linux platform. We will also show how to configure, introspect and debug the pipewire daemon, all the way to creating DSP chains by simply writing a small config file.
---
Embedded Software Developer at Bang and Olufsen.
Graduate from Aalborg University Copenhagen in Sound and Music Computing.
Published libraries and talks on speech quality prediction.
Currently working with alsa, pipewire, jack and all things audio on embedded linux.
---
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
Squeeze C++ JUCE and Bottle It Into Linux Embedded Devices and More - Stefano Zambon - ADC 2024
---
Running JUCE applications on embedded Linux devices is not a new thing. The topic has been treated in previous ADCs and, most notably, at ADC 2016 Felipe Tonello introduced a repository for Yocto/OpenEmbedded to make the task easier.
However, several things have changed in the meantime both in JUCE and in the embedded Linux world. This talk will present a new integration between CMake-based JUCE projects and Yocto/Openembedded, targeting modern embedded Linux platforms using the Raspberry Pi as an example.
The focus will be on the entire embedded development workflow, showing how to build target filesystem that can be run on the devices, cross-compiling SDKs, and automated testing tools suitable for modern CI/CD integration.
---
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
Quality Audio for Low Cost Embedded Products - An Exploration Using Audio Codec ICs - Shree Kumar, Atharva Upadhye - ADCx India 2025
---
Designing a decent quality audio solution at a low cost is an important challenge in embedded systems. This is made tricky as the bar for audio quality is set pretty high by everyday consumer products, which rely on highly integrated solutions. Consumer solutions achieve low cost, but that comes with the requirement of high volumes production. Embedded products typically do not scale to such volumes, which is what makes this a challenge.
With microcontroller based solutions, narrowing down the proper choice of components is an iterative process, especially for teams that have not dealt with audio at the lowest levels. The last mile cost optimization can be non-obvious, needing to push things down to clocking architecture.
In this talk, we will walk through a few audio solutions we investigated using audio codec ICs, with various cost/quality tradeoffs: Cirrus Logic WM8758, Princeton Tech PT8211, finally settling on Everest Semiconductor ES8388. The base hardware board is based on the Raspberry Pi RP2040 microcontroller, making good use of the PIO peripheral. We will cover essentials such as the I2S interface (master/slave), and codec configuration. We will also explain the clocking architecture (and software implementation) that eliminates the discrete crystal sometimes required for the codec, achieving the lowest cost per board.
---
Shree is an embedded software engineer, and an independent consultant, with over two decades of experience across many layers of the system software stack. He headed the software team that designed India's first 3G tablet. Some of his early significant work was in High Performance Computing (HPC) visualization, winning awards at SuperComputing 2007 (SC '07) conference. He also created KitePhone, the world's first DIY 3D printable Android smartphone concept. Shree enjoys long walks and longer bicycle tours. Recently, he has been spending time looking at government policies, especially related to semiconductors.
---
Atharva Upadhye
Atharva is an accidental engineer with a background in sports. He has always wanted to work on hardware stuff. He is currently serving time at Samsung Semiconductors, working on SSDs.
---
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
Crunching the Same Numbers on Different Architectures - Analysis of the Different Architectures Used in Embedded Audio Signal Processing - Marco Del Fiasco - ADC 2024
---
DSP, microcontroller or a general purpose CPU? What are the major factors affecting design choices in embedded systems today, and how do they compare in terms of computational speed?
Since 1978 DSP chips were invented to cope with some limitations of existing CPUs. Audio processing has always been challenging because of inherently high demand for both throughput and low latency processing features. This led the chip manufacturers to develop specific architectures for such challenging tasks.
During the years the increasing demand of computation led also to develop on-chip hardware accelerators for specific tasks like FIR, IIR and DMA, making the machines more and more performant generation after generation. Hardware acceleration is great, but has a drawback: the design then becomes more and more architecture-locked, preventing a faster renewal of the OEM platforms and the embracement of new emerging technologies.
While the DSP world was evolving, also the general purpose CPUs made very big steps forward in terms of computational speed. They typically run with some high end operating systems like Linux that offer a wide set of ready to use features such as networking, USB, BT… and a huge number of available libraries you can use to fasten the audio application development cycle. This makes them very attractive in terms of flexibility.
In the middle, between specialised DSPs and general purpose CPUs there are microcontrollers. They integrate some other hardware that a product usually requires and provide low power operation. We will explore why they are one of the choices available and how they position in terms of computational performance.
The aim of this talk is to give an overview of the different architectures used in embedded audio signal processing, their advantages and disadvantages, and try to compare them with a holistic view. This will take into account computation power, ease of use, BOM cost, power requirements, expandability and give an overview of why all the architectures are still there in 2024 competing after so many years.
We will make use of real code for the comparison that will also highlight how the different chip architectures have an impact on code design.
I am a freelance embedded engineer helping audio companies to develop modern digital platforms and algorithms.
I have 15 years experience with many projects across the music industry, pro audio and car audio.
My expertise spans from DSP chips and microcontrollers to modern CPUs running hard realtime audio processing.
I developed several algorithms, peripheral drivers, libraries and frameworks making use of bare-metal, embedded RTOS and embedded Linux.
---
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
