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Soundproofing my studio: what's in a wall?

Jeff with resilient channel

Soundproofing is... kind of an art. It's not as simple as buying something and slapping on your walls. And the word 'soundproofing' is a bit of a loaded term.

You could mean deadening sound, so you can record podcasts with that signature radio sound. Or you could mean isolating a room from outside noise, which is an entirely different process. Or you could work on reducing resonance, echo, or just certain frequencies.

In my case, I wanted to build kind of a 'sound cocoon' in the middle of this space, so I could record any time, day or night, even if my AC is running.

Time Card mini adds Pi, GPS, and OCXO to your PC

For LTX 2023, I built this:

CM4 Timecard mini GPS locked

This build centers around the Time Card mini. Typically you'd install this PCI Express card inside another computer, but in my case, I just wanted to power the board in a semi-portable way, and so I plugged it into a CM4 IO Board.

The Time Card mini is a PCIe-based carrier board for the Raspberry Pi Compute Module 4, and by itself, it allows you to install a CM4 into a PC, and access the CM4's serial console via PCIe.

But the real power comes in 'sandwich' boards:

Ampere Altra Max - Windows, GPUs, and Gaming

Ampere Altra Developer Platform Workstation

I'm testing Adlink's Ampere Altra Developer Platform. This machine has a 96-core Arm CPU, but now they sell a 128-core version. Apple also recently released the M2 Ultra Mac Pro, so the model I'm testing isn't the "fastest in the world" like I could boast a couple months ago... but it's close, and I actually doubled my performance from last time—I'll show how later.

I'm done with Red Hat (Enterprise Linux)

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Two years ago, Red Hat killed CentOS, a widely-used free version of their Enterprise Linux distribution.

The community of CentOS users—myself included—were labeled as 'freeloaders', using the work of the almighty Red Hat corporation, without contributing anything back. Don't mind all the open source developers, Linux kernel contributors, and software devs who used CentOS for testing and building their software. Also ignore the fact that Red Hat builds their product on top of Linux, which they didn't build and don't own.

Testing a 96-core Ampere Altra Developer Platform

If you're tired of waiting for Apple to migrate its Mac Pro workstation-class desktop to Apple Silicon, the Ampere Altra Developer Platform might be the next best thing:

Ampere Altra Developer Platform in Jeff Geerling's workshop

I somehow convinced Ampere/ADLINK to send me a workstation after my now years-long frustrated attempts at getting graphics cards working on the Raspberry Pi. And they sent me a beast of a machine:

TV for one million: Exploring KSDK's broadcast tower

KSDK-TV broadcasts to well over 1 million households in the St. Louis metro area. And my Dad and I went to their broadcast tower last month to explore how the digital TV signal is delivered through the air to so many people.

Three towers KSDK-TV in Shrewsbury St. Louis MO

On our tour, we explored over 75 years of television broadcast history, seeing how things transitioned from thousands of volts down to hundreds, and from analog audio and video to all-digital.

And we even found strange artifacts of the past, like this random microwave dish that received a signal through the roof of the broadcast building for a time:

Testing Raspberry Pi's new Global Shutter Camera

Today Raspberry Pi launched their new Global Shutter Camera.

Global Shutter Camera showing image sensor

Outwardly it is almost identical to the 12 Megapixel High Quality Camera, and like that camera it accepts C and CS mount lenses, or most anything else with the appropriate adapter.

But flipping it over reveals a black plastic cover over the back of the board that is not present on the HQ or M12 HQ Camera:

RISC-V Business: Testing StarFive's VisionFive 2 SBC

It's risky business fighting Intel, AMD, and Arm, and that's exactly what Star Five is trying to do with this:

StarFive VisionFive 2 Black Background

The chip on this new single board computer could be the start of a computing revolution—at least that's what some people think!

The VisionFive 2 has a JH7110 SoC on it, sporting a new Instruction Set Architecture (ISA) called RISC-V.