LWDW 355: Linux powered Landlines

Korg synthesizers are full of Pi, easy webcam settings with Cameractrls, noise-cancelling PineBuds, and Linux powered landlines.


00:00 Intro
05:02 Holiday sweets
06:12 Webcam control with Cameractrls
12:10 Linux powered landlines
16:40 PineBuds Pro
24:16 Cool Pi 3 Model B
28:06 Korg full of Pi

Cameractrls (RTheren)



  • There is a new webcam settings application for Linux called Cameractrls.
  • Cameractrls is a standalone Python CLI and GUI SDL camera Viewer to set the camera controls in Linux.
  • And it is a simpler alternative to Guvcview, and more modern and cleaner looking.
  • Settings include:
    • Exposure, including manual control and backlight compensation
    • Color, including manual or auto white balance, brightness, contrast, etc
    • Advanced settings (if available) including frequency
    • Pixel format, resolution, and FPS
  • If you have a Logitech webcam you get access to additional controls, including crop, zoom, field-of-view, pan, tilt, and focus controls.
  • I installed the official flatpak on one of my laptops.
  • Cameractrls doesn’t have video or audio recording capabilities like Guvcview, and there is quite a bit of fine grain control missing, but it works well and is quick and easy to use.
  • It is nice to have an alternative to our trusty and highly customizable Guvcview we have been using for years here at LGC.
  • Camera controls for Linux has extensions for Logitech and Kiyo. 
  • You’re going to need libturbojpeg and SDL2 if you want to play with the git version. 
  • That’s libturbojpeg0 on Debian. 
  • After that, it starts right up. 
  • You can run ./cameractrlstk.py for that hipster-retro look. 
  • It has the option to be used from the terminal and you can save and restore controls with Systemd.


Philly phones




  • So I did see a short blurb about this on NBC news about a month ago, but I hadn’t heard the exciting details that the phone booths would communicate using Linux and open source software!
  • The first phone using the network will make its debut at Iffy Books on December 17, 2022.
  • Of course it would be at a bookstore, the original home of nerds.
  • Philadelphia in particular has a lot of payphone use, even as payphone companies have been steadily removing phones from service year after year. 
  • PhilTel is looking to install new (to us) payphones within the city of Philadelphia. Any payphone installed will be completely free-to-use, allowing the user to place calls within North America. 
  • They will collect no data from users and have no record or insight into the contents of calls. 
  • The workhorse of our network is an Asterisk-based Public Branch eXchange (PBX) running on a (VPS).
  • Grandstream HT801 ATA for ADC. 
  • The difficulty with something like this in my area would be finding phone booths with phones. 
  • I spent a day driving around with a friend looking for one a few years back. 
  • We found 2 or 3 with phones still attached.


PineBuds Pro (RTheren)



  • Many Linux users have been very excited since Pine64 made the announcement they were making these in April…the open source friendly PineBuds Pro are now available to buy for $69.99 at the Pine64 store.
  • The PineBuds Pro are true-wireless earbuds with support for active noise cancellation, touch controls, and a charging case with a USB-C port and LED battery status indicator.
  • And in Pine64 tradition, you can upgrade them with open firmware to improve performance and add new features to the earbuds.
  • Pine64 anticipates custom firmware that will allow users to do things like change what happens when you use the touch controls or alter audio settings or other behavior.
  • And my favorite custom firmware feature for those hard of hearing, add new features such as turning the earbuds into hearing aids.
  • So I just bought a pair of the PineBuds Pro for me and my Steve Husband to test and play with!

Slice of Pi

Cool Pi 4 


  • Orange Pi has released the Cool Pi 4 Model B – A much faster alternative to Raspberry Pi 4 SBC.
  • The Orange Pi’s Cool Pi 4 Model B has literally hit the sweet spot, it is not just close to the Raspberry Pi 4’s form factor, but is also using a similar name to the Raspberry Pi franchise.
  • Thus making it easier for the average user to buy and try them out because of familiarity with the RasPi ecosystem.
  • And at $142.00-$205.00, it is still cheaper than most Raspberry Pi’s 4s on the market.
  • Offered up with the same form factor as the Raspberry Pi 4 Model B, the Cool Pi 4 Model B utilises the Rockchip RK3588S, with up to 16 GB of LDPDR4 RAM and 128 GB of eMMC flash storage. 
  • It’s another rip-off of the Raspberry Pi 4 Model B, albeit one that utilises a more powerful SoC.
  • Cool Pi 4 Model B supports Debian 11 Desktop and Ubuntu 22.04 Desktop.
  • 8 GB RAM & no storage – US$156 | 64 GB storage – US$175
  • That’s where the Cool Pi 4 falls flat. 
  • Yeah, it’s available but a wee pricey compared to the Orange Pi 5 & NanoPi R6. 


Korg Pi 



  • Korg’s new line of more accessible digital synthesizers includes several that are built on Raspberry Pi Compute Module 3.
  • These units are designed to come in at sub-$1000 price point.
  • We now have a reliable source for the Compute Module 3.
  • Granted, a Wavestate is going to run you $600. 

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