We are delighted to announce our continued collaboration with the Embedded Recipes conference, scheduled for September 28th and 29th at the Biermans Lapotre Foundation in Paris. For its 5th edition this year, we will be participating as a sponsor, delivering an engaging presentation, and having our team on-site to meet and greet you in person! […]
TL;DR Audio pipelines often use asynchronous devices, which must be synchronized with resampling. Measurements show CPU load of resampling reach almost 30% of a CPU core on an i.MX8M Nano. A possible optimization is to use feedback with USB UAC2 audio gadget. alsaloop already supports it, as Pipewire since a recent version. A sound server […]
PipeWire, implementation and evaluation In the last article, we prepared an audio system on which we could replace the sound server. In addition, we explained the main concepts of JACK and PulseAudio in audio recording and playback. This second part presents PipeWire, how to use it in our audio system and measures its performance. PipeWire PipeWire is […]
Audio system set-up In Linux embedded system world, ALSA (Advanced Linux Sound Architecture) is the lowest level way to provide an API for sound card device drivers. However, its limitation is to only allow one process to open a device. This is why we need sound servers, which take care of handling sound streams between applications. They are the […]
Introduction Continuous Integration (CI) is a development practice that consists in constant and frequent merges of a team’s contributions into a shared repository. Code quality, reliability and non-regression are verified thanks to automated builds and testing prior merging each modification. Unlike software applications, there are multiple things to consider when setting up a CI with […]
A previous article was dealing with recommendations concerning the set up Linux RT and its application software. This article will provide an industrial use case and focus on the performance measurement on a dedicated hardware. A Practical Demonstration SFL performed tests to demonstrate these principles on a custom board containing a Cirrus Logic EP9302 […]
Using Linux with the PREEMPT_RT option can make it possible to run a modern, secure kernel on an older, limited performance single board computer (SBC), perhaps avoiding a costly hardware upgrade campaign. This topic will be addressed in two parts. The first article will consider Real-Time Linux implementation in the kernel. The second article will […]