Tim Janik ✅ @timj@social.tchncs.de

Fiddling…

I'm working on a new knob for #Beast, with bidirectional and unidirectional modes.

The updates may only use "transform:rotate(angle)" #CSS to utilize #GPU acceleration during automation.

Sadly, Chrome cannot compose *inside* and SVG, so I have some nasty splitting and layering of the #SVG elements going on...

3/3 While the ability to run at nice priority -20 still requires root permission for the initial setup (or SYS_CAP_NICE), even that could *potentially* change with the introduction of a latency nice setting, if the kernel developers manage to implement unelevated latency re-nicing without opening up the gates for DOS attacks.

These developments are described in the LWN article 'The many faces of "latency nice"':

https://lwn.net/SubscriberLink/820659/d293ce7f2c05139f/

#linux #audio #lad

2/3 Not only is the risk of system lockups unwarranted to avoid audio drop outs, there is also no need for it to be taken.

Just prioritizing the audio rendering threads to run at nice level -20 is sufficient to prevent drop outs in low-latency setups, i.e. setups with <10ms round trip time. BTW, such setups require audio fragment sizes <= 128 samples (or "periods with <= 128 frames" in ALSA language).

#linux #audio #lad

1/3 On the topic of Linux low-latency audio setups…

Installing jackd (1 or 2) still requests "realtime priority" to minimize latency.

This project should really get its act together and stop demanding this kind of elevation from benign audiophile users.

Don't enable this! Running a process with realtime scheduling priority allows it lock up the system for good (and no code is bug free).

#linux #audio #lad

Resistance is fruitful: 😀
CANN rejects sale of .org registry to for-profit investor group

https://www.reuters.com/article/us-icann-org-sale-idUSKBN22D4FV
#SaveDotOrg

BAD G++!

Apparently, g++-9.2.1 does *not* const-initialize a `static Class x;` with a constexpr ctor, *if* it also happens to have an uninitialized uint64_t array member. It does not generate a warning either, but surely triggers the "C++ Static Initialization Order Fiasco" at some inconvenient future point.

#cplusplus #cpp

If you use #LetsEncrypt certificates, check your hostname here to see if the cert is going to be revoked tomorrow, and you need immediate renewal: https://unboundtest.com/caaproblem.html

More details:
https://community.letsencrypt.org/t/2020-02-29-caa-rechecking-bug/114591

I just signed a petition to the European Commission:

Demand the Right to Repair your smartphone.

Sign here: https://repair.eu/smartphones/ #RightToRepair

I've written down the details of compatibly selecting modern #SIMD instruction set extensions for the #Beast builds in a blog article.
The crux is avoiding extensions that are Intel only or AMD only.

https://testbit.eu/2020/intersecting-instruction-set-extensions

Web packaging technology is torture.

The last week, I've been fighting webpack, parcel, #rollup, babel and bili, just because vue stopped supporting #browserify and I had to figure what to use as a replacement in #beast.
^^^ If that sentence sounds like it has too many web tech buzzwords, that's *exactly* the problem.

And it's only a fraction of packages I had to deal with...
Most packages have documentation, but only provide tiny puzzles of a much bigger picture that is revealed nowhere...

Yay! Power loss due to some digging work outside.

Hope the BTRFS disks in the main server survived the sudden outage.

The #dehydrated client for #letsencrypt is shell only and really rocks!

But it got way too late again, will have to continue setting up the new Testbit site tomorrow, good n8!

https://github.com/lukas2511/dehydrated

Today, I've implemented per #websocket connection cleanup of remote std::shared_ptr references in #Beast's #Jsonipc layer.

What we *really* need is per Javascript object cleanup of remote references though, but that requires FinalizationGroup support in Javascript:
https://github.com/tc39/proposal-weakrefs

That's still unfinished though, why do I always need bleeding edge features?

Time for bed I guess, maybe the edge looks less bleeding tomorrow... ;-)

Last Tuesday #Beast 0.15.0 was released.

This is most probably the last release that supports the #Gtk+ Beast UI. We have most of the bits and pieces together to move towards the new EBeast UI and a new synthesis core in the upcoming months and will get rid of a lot of legacy code along the way...

https://testbit.eu/2019/rewriting-beast
#electron #linuxaudio

Beast version 0.15.0 is released.

#Beast is an LGPLv2+ music synthesizer and composer (#DAW), for #Linux.
This release supports Jack as PCM driver and the experimental Ebeast frontened got many style updates, play position pointers and supports the Space key.

Full news:
https://beast.testbit.org/#news
#linuxaudio

Now its officieal, #CCC congress (#36c3) is in #Leipzig again:
https://events.ccc.de/2019/10/04/36c3-in-leipzig/

If you use/develop or care about #FOSS / FLOSS, take some time to answer this #EU survey. Feel free to mention #mastodon, seems they only know about FB, Birdsite and Slack.

https://ec.europa.eu/eusurvey/runner/EUFOSSA2-Survey