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The Halls of Valhalla
Personal blog · valhalladsp.wordpress.comprogrammingscience
The Halls of Valhalla is a personal blog at valhalladsp.wordpress.com about programming and science. Since 2014, 3 different Hacker News readers have linked it 3 times. The last post was in 2015, but the archive is still widely read.
Too few sampled comments (3) to say how often HN recommends it.?
Why HN links it
Blog of Sean Costello, a boutique DSP developer. Its posts cover digital audio processing, including a series on digital pitch shifting and time stretching that one commenter links.
Summarised by Claude from a sample of 3 HN comments that link here. Each comment is marked recommending, critical or neutral (citing without judging); how this works.
What Hacker News says?
Some examples... The reverberation algorithms mentioned by TheOtherHobbes often bear no resemblance to the methods used for analog gear. The most commonly understood setup, in the first digital reverbs described by Manfred Schroeder [0], uses banks of all-pass delay lines set up in "aesthetically interesting" sequence and series, employing various levels of feedback. Digital frequency filters (and I'm pretty unclear…
Comment linking /2009/05/30/schroeder-reverbs-the-forgotten-algorithm/
on “Fourier Image Filtering”Search "physical modeling" on dafx.de: https://www.dafx.de/paper-archive/search.php?q=physical+mode... You might also like to search "analog modeling" or "virtual analog" for models of analog electronic circuits (distortion pedals, filters, etc.) Book about modeling, eg., car engines in Pure Data (eg., for games): https://mitpress.mit.edu/9780262014410/designing-sound/ You might check out the source code to Émilie G…
Comment linking /
on “Ask HN: Create audio software akin to physics engines?”It's called timestretching. You basically have to chop up the sound into little bits and play them back in a staggered fashion. The technology has a history from before the digital age: http://www.wendycarlos.com/other/Eltro-1967/index.html Boutique DSP developer Sean Costello has done a great series of articles here: https://valhalladsp.wordpress.com/2010/05/06/digital-pitch-s...
Comment linking /2010/05/06/digital-pitch-shifting-early-work/
on “My two favourite (underused) HTML5 media features”