@rbrown46

Technical Principal, Audio Engine Team @ableton

 Berlin
Joined November 2007
  • Tweets392
  • Following743
  • Followers504
41Media
📣Instruments in Xcode 16.3 Beta 2 contains a brand new tool for analyzing CPU workloads: Processor Trace. It uses hardware execution tracing to accurately reconstruct program execution and is available on M4 and all iPhone 16 devices. Learn more on developer.apple.com/document…

Analyzing CPU usage with the Processor Trace instrument | Apple Developer Documentation

Identify code where your app uses the CPU inefficiently.

developer.apple.com
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Ryan Brown retweeted
Ableton
@Ableton8 Oct 2024
Ableton Move is out now. Take it anywhere. Create whenever. Trust your instincts. Learn more about Move: bit.ly/4gX2jj1
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Ableton
@Ableton14 Nov 2023
Introducing Live 12 – with countless new ways to kickstart ideas and keep your creativity moving. See what’s in store: ableton.com/live

Ableton Live 12: Explore what’s new

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Mark
@offlinemark8 Apr 2023
Update: I started a Youtube channel!🎥 In addition to writing, I've found that I really enjoy recording screencasts Currently videos on: - Watchpoints - glibc internals - LLDB memory corruption bug I found - Linux kernel Take a look and subscribe if you like my teaching style:
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Boom! Happy to finally be able to share what my team and I have been working on for so long.
Ableton
@Ableton18 Oct 2022
Introducing Note: a playable iOS app for forming musical ideas. Learn more: ableton.com/note

Ableton Note: an app for musical sketching

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Ryan Brown retweeted
Ableton
@Ableton18 Oct 2022
Introducing Note: a playable iOS app for forming musical ideas. Learn more: ableton.com/note

Ableton Note: an app for musical sketching

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Finally managed to do a long hiking trip: 13 days solo from Germany to Italy over the Alps on the L1. Definitely had my fill of Kaiserschmarrn, Kniffel and Mau-Mau for the year. 🏔️🥾 out.ac/ad4dG
Speicher Finstertal

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Atterkarjöchl

ALT Atterkarjöchl

Vernagt Stausee

ALT Vernagt Stausee

Near Naturno

ALT Near Naturno

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TIL: some Linux distros patch clang to enable -fstack-protector-strong by default, which can add a branch to functions. Including hot per-sample DSP functions that go to great lengths to avoid all branches. Set -Rpass=stack-protector to see which functions are impacted and why.
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10 years at Ableton today 🎉
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What a day - @ThrowingSnow has finally a new album out on the ever amazing @HoundstoothLBL. I've been a fan since day one and its amazing to see an artist take such a big journey, knowing that this album is just a step to something much bigger! throwingsnow.bandcamp.com/al…

Dragons, by Throwing Snow

10 track album

throwingsnow.bandcamp.com
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olilarkin/awesome-musicdsp: A curated list of music DSP and audio programming resources github.com/olilarkin/awesome…

GitHub - olilarkin/awesome-musicdsp: A curated list of my favourite music DSP and audio programming...

A curated list of my favourite music DSP and audio programming resources - olilarkin/awesome-musicdsp

github.com
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Dezember 2019: Neuartiges Corona-Virus wird entdeckt. April 2021: Bundesregierung beschließt zeitnah eine Notbremse.
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Cooked for the parents. Homemade hummus with fried onions and garlic, kisir, boiled eggs and matzah 🤤
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Been busy gathering examples, relevant research and summarizing thoughts based on my experience working with large legacy codebases at @AbletonDev and @cycling74 for @audiodevcon. Hope to chat if you're attending, love this annual gathering of the music tech community👌#ADC20
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Dan Luu@danluu15 Oct 2020
This pair of blog posts that blows up the idea that you can benchmark by running a warm-up period and then taking the last N results without looking at the underlying data are some of the best performance blog posts I’ve ever seen: tratt.net/laurie/blog/entrie… tratt.net/laurie/blog/entrie…
Plot of benchmark that slows down after warm-up period and additionally has a spike sometime after being warmed up.

ALT Plot of benchmark that slows down after warm-up period and additionally has a spike sometime after being warmed up.

Plot of benchmark that shows no steady state regardless of warmup time.

ALT Plot of benchmark that shows no steady state regardless of warmup time.

Plot of benchmark that becomes more divergent over time as more warmup is done.

ALT Plot of benchmark that becomes more divergent over time as more warmup is done.

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C++ name mangling guide to social distancing #cplusplus
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TIL: iterating over a large std::tuple can result in code bloat (=instruction cache misses), since the machine code is copy-pasted per element rather than looped over. godbolt.org/z/57xTdv We need an optimizer pass that does the opposite of loop unrolling.

Compiler Explorer - C++ (x86-64 clang (trunk))

void tupleIteration() { boost::mp11::mp_repeat_c, 128> tup; boost::mp11::tuple_for_each(tup, [](const int& x) { printf("%d", x); }); } void arrayIteration() { std::array arr{}; for (const int x :...

godbolt.org
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Functions called per tuple element are also inlined more aggressively, polluting the i-cache: godbolt.org/z/GcjWhE tupleIteration(): 8050 lines of asm arrayIteration(): 384 lines @chandlerc1024 @PiotrPadlewski Any ideas for how to prod clang into generating a loop here?

Compiler Explorer - C++ (x86-64 clang (trunk))

struct A { void f() { vec.emplace_back(rand()); } std::vector vec; }; void tupleIteration() { boost::mp11::mp_repeat_c, 128> tup; boost::mp11::tuple_for_each(tup, [](A& a) { a.f(); }); } void...

godbolt.org
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Machine outlining (opposite of inlining) is a thing on ARM/AArch64, maybe it’ll help here. reviews.llvm.org/D57054 – at Berlin, Germany
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