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#dsp

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Suite du fil

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

#STM32#Embedded#Synth

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
Suite du fil

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?

Suite du fil

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.

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

I was writing a .WAV exporter for Boop (audio app), because other available code seemed to be doing it wrong, with respect to negative values in PCM audio.

Specifically, some apps scale negative values over 128 steps, and positive values over 127. It's asymmetric.

And a problem, if apps don't agree. Which they don't; there's no standard in the format; just opportunity.

So I'm in the symmetric +/-127 camp.

Same for 16, 24, 32 bits, signed.

johnvalentine.co.uk/?art=boop

johnvalentine.co.ukBoop - John ValentineAn offline software synthesizer. Design a synth with a graph of nodes.
#dsp#audio#dev

Deeper Disco : mathr.co.uk/web/deeper-disco.h

I made a small #Noise generator for multiple platforms. Maybe serves as an example of how to bootstrap #ExecutableMusic #SizeCoding #Audio #DSP on common platforms. Probably not optimal, tips welcomed.

APIs used:
- #Amiga audio.device
- #Windows wave mapper
- #Linux /dev/dsp
- #HTML5 audio tag with WAV blob

Linux version can write WAV to stdout with a compile-time option.

Two Amiga versions target A500 and A1200.

Windows and Linux support Intel and ARM architectures (both 64bit and 32bit).

Linux on other architectures will need some more inline assembly for the syscalls.

mathr.co.ukDeeper Disco :: mathrAnother noise generator.