Voting resources, early voting, and poll worker information - VOTE. ... Adafruit is open and shipping.
0

Recovering audio from a lost format with open source software #OpenSource @opensourceway

opensource.com discusses the history of HDCD format optical disc and recovering lost audio using Linux.

Those of you who remember the early 2000s will recall that most of the world was still consuming music on CD. Our family was no exception, and we ended up with a fine CD player that had an interesting feature—it was able to decode regular CDs as well as high-definition-compatible digital (HDCD) discs.

HDCD encodes the equivalent of 20 bits worth of data in a 16-bit digital audio signal by using custom dithering, audio filters, and some reversible amplitude and gain encoding; Peak Extend, which is a reversible soft limiter; and Low-Level Range Extend, which is a reversible gain on low-level signals.

Pacific Microsonics, the manufacturer, ceased operations in 2000.

Fortunately, FFmpeg’s libavfilter includes an HDCD filter as of FFmpeg 3.1 (June 2016) that will convert 16-bit PCM with HDCD data to 20-bit PCM.”

See the article on the Linux commands used to decode the audio and reencode it to flac.

Image source: Wikipedia CC Silver Spoons



Adafruit has had paid day off for voting for our team for years, if you need help getting that going for your organization, let us know – we can share how and why we did this as well as the good results. Here are some resources for voting by mail, voting in person, and some NY resources for our NY based teams as well. If there are additional resources to add, please let us know – adafruit.com/vote

Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 24,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/

CircuitPython – The easiest way to program microcontrollers – CircuitPython.org


Maker Business — To make it through a tough business cycle, layoffs should be a last resort

Wearables — Sparkle nails

Electronics — Tactile Confusion?

Python for Microcontrollers — Python on Microcontrollers Newsletter: CircuitPython 6 beta 0, Discord 25k and much more! #Python #Adafruit #CircuitPython #CircuitPythonDay @micropython @ThePSF

Adafruit IoT Monthly — Mitigating Climate Change with IoT, LoRaWAN Gardens, and more!

Microsoft MakeCode — MakeCode and Wonder Woman 1984 Team Up

EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey

New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — JP’s Product Pick of the Week 9/22/20 AHT20 Temp & Humidity Sensor @adafruit @johnedgarpark #adafruit #newproductpick

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.