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#dsp

2 posts2 participants1 post today
Public
Mäh W.

LG has made a thing called "Smart Diagnosis". On some devices you press a special button for a specific time and the device starts to emit a sequence of tones that sound a bit like a fax machine.

I am looking for
1) people with LG devices who are willing to record the sound and share it with me for further analysis
2) folks with a better understanding of digital signal processing who are interested to help out doing demodulation+decoding.

🧵 A little thread...

Screenshot of the German version of the LG ThinQ app which allows to analyze the sound; symbols of the "Smart Diagnosis" feature
Diagnosis result from a replayed recording
#dsp#hacking#audio
Public
amen zwa, esq.

Some good #books on #DSP for #engineering undergrads:

for #EEs

• Digital Signal Processing, Oppenheim—the Bible
• Understanding Digital Signal Processing, Lyons—accessible, comprehensive, and practical
• Introduction to Digital Signal Processing, Kuc—dated but good
• Digital Filters, Hamming—a classic
• Wavelets and Filter Banks, Strang—straight from the Master
• Digital Signal Processing using ARM Cortex-M Microcontrollers, Ünsalan—STM32F4 bare-metal C programming using CMSIS-DSP library

for non-EEs

• The World According to Wavelets, Hubbard—easy overview by a non-STEM writer who interviewed all the big names in wavelet research
• The Scientist and Engineer's Guide to Digital Signal Processing, Smith—the gentlest

Bottom line: the more broadly read the student is, the more accessible the subject becomes.

Continued thread
Public *
Karsten Schmidt

Btw. Here's another 6½min live performance from my talk @ #Resonate 2016. Alas, there were some cable issues on stage and I had to record it all afterwards in my hotel room. The setup was the same as in the first video from the previous post (i.e. STM32F746 DISCO + Korg Nanokontrol)

soundcloud.com/forthcharlie/st

SoundCloudSTM32F7 live recording (Resonate)Best enjoyed with headphones! Recorded live set in hotel after last minute tech issues during my lecture. Turned out the Korg nanoKontrol lost its configuration earlier - such a shame, was looking for
#STM32#Embedded#Synth
Public *
Karsten Schmidt

Just realised the readme for thi.ng/synstack (a C11 & Forth-based softsynth engine for #STM32) had broken links to two live performances/demos I creeated in early 2016. I've now fixed those and re-uploaded these videos to my Makertube/Peertube:

STM32F746 MIDI synth & Korg Nanokontrol (live recording, 2016-01-31)
makertube.net/w/6tYcSLrJdPfev8

STM32F746 synth GUI (live recording, 2016-01-28)
makertube.net/w/mbeSF3y2rs2xnx

thi.ng/synstackthi.ng/synstack
#Embedded#Synth#DSP
Continued thread
Public
Chuck

Okay #math and #dsp folks. Is there a noise function that I can initialize to generate a mode between to values?

Say I have a function f(x) which generates either 1 or 0 each time I call it. I call it N times, and sum the ones and zeros and then divide by N, I want the result to be "P" (which is a number 0 <= P <= 1)

A uniform distribution gets me 0.5, I want a distribution that centers around P.

Thoughts? Plan of attack? References?

Formula showing the average value from a noise function returning 1 or 0.
Continued thread
Public *
David Wakeham

To top it off, QSTARS has made it clear that, despite my efforts, securing alternative accommodation is unlikely.

I feel invisible, hardly even a statistic, much less a person.

QLD Housing Centre continue to refuse assistance and gaslights me & others in desperate need. Lying to our faces.
 
So, the next time you hear a politician claim they’re helping individuals like us, remember—it’s often far from the truth.

#auspol#AusVotes2025#ableism
Public
Marcus Müller

Crowdsourcing #DSP creativity!

You could help @gnuradio 's block documentation wiki a lot if you could try out our instructions for how to add example flowgraphs to Block Doc pages!
wiki.gnuradio.org/index.php?ti

The documentation team (and countless contributors) have created a host of 555 block documentation pages to date. Not every single one of these has an example flowgraph that really illustrates the useful things you could do with that block.
Could you help?
#gnuradio #sdr #docs #docstodon

Iconic image: a block in a GNU Radio flow graph, with a star on it
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