15:I[981,["511","static/chunks/511-fc0d2f24caf5741b.js","183","static/chunks/183-6beeeb801c274aaa.js","474","static/chunks/app/%5Btype%5D/layout-347af3707a752b1a.js"],"Posts"] 16:T64f,Hi, I’ve developed an open-source app for practicing basic skills in digital signal processing and computer graphics using OpenGL. It’s written mainly in C++ for data processing and visualization, with Python used for data input and configuration. This makes it easier to run experiments or adjust settings without recompiling the code, lowering the entry barrier for users unfamiliar with C++.

By default, the app captures audio from a microphone in real-time and displays its spectrum on the screen. It’s highly customizable — you can change the number of bars, colors, and the overall color theme. The app runs on both Raspberry Pi and standard Ubuntu desktops.

In my Raspberry Pi setup, I use a HiFiBerry DAC+ DSP to analyze music in real-time. The signal comes via optical input (TOSLINK) from a CD player, but you can also connect a microphone for live audio visualization.

I’ve written instructions and a tutorial to help you get started — feel free to check it out and give it a try!

Demo video (Ubuntu): https://www.youtube.com/watch?v=Sjx05eXpgq4 Demo video (raspberry pi with hifiberry dac+dsp): https://www.youtube.com/watch?v=QA2DYmdZ_Gw Simplified spec: https://sylwekkominek.github.io/SpectrumAnalyzer/

Hope someone finds it useful or fun to play with!17:T527,Highly ambitious individuals often have lots of going on in their mind - they want to get things done, train hard, eat well, maintain social life (scientifically this can excel productivity), build relationships and push their limits.

And

Ask HN: I need help with my project

Show HN: Configurable Open Source Audio Spectrum Analyzer

RetroZilla

NVIDIA outlines plans for using light for communication between AI GPUs

Questing for Transcendence

Lack of operational excellence threatens us, not AI

Ask HN: Best Marketplaces for Used Servers?

Stand-Up – Why are we using a public meeting for performance management?

Meta partners with Midjourney to license AI tech for future products

Half my work is adding a cache

In Defense of the Amyloid Hypothesis

I ran out of storage, so I made this tool to convert Live Photos to still images

The Chevy Corvette ZR1X Is $120K Cheaper Than Mustang GTD

Reliable

Underdog bias rules everything around me

Apple Watch's blood oxygen restoration may get killed by ITC

My favorite developer productivity research method that nobody uses

<script type="text/llms.txt">, a proposal for inline LLM instructions in HTML

A Brilliant and Nearby One-Off Fast Radio Burst Localized to 13pc Precision

In 512(f), the "F" Stands for "Futility"–Shaffer vs. Kavarnos

Trump mobilizing up to 1,700 National Guard troops in 19 states

Internet Access Providers Aren't Bound by DMCA Unmasking Subpoenas–In Re Cox

Ask HN: Does using public transportation make you more creative than driving?

Fast or slow metabolisms are not a "lie"

There is not one integrated self

Mark Gatiss, the boy that Dr Who books made

There Is No Trolley Problem

The problem of scheduling life like a spreadsheet

Building things of worth in a shallow world

Lyn Alden August 2025 Newsletter: Tighter Fiscal, Looser Monetary