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Airwindows is one guy: me! I am an audio hacker and computer programmer from way back. I seek only to continue my life up here in Vermont, inventing things and putting them onto the internet, sometimes for free and sometimes for pay. My hope is that people richer than me (i.e. most people) don't rob me. My other hope is for another cup of Aeropress. One out of two ain't bad!



TL:DW; Emulates power supply limitations for analog modeling. PowerSag We’re going to explore the early Desk plugins (as free VSTs), so here we’ll start off with one of the underlying principles! PowerSag models the problem of analog power supplies that can’t source enough current to drive the output of the circuit. The circuit doesn’t directly […]


TL:DW; Soft frequency-doubling-and-tripling waveshaper. Fracture Hi! Merry Xmas to Xmas-ers. Here’s a truly freaky little wave-shaper. It’s of interest to distortion fanciers, those who make wubs and things, and anybody who might like the digital equivalent of an insane boutique stompbox that doesn’t sound like anything else. It’s not exactly the sort of thing you […]


TL;DW: Deterministic dither uses Benford Realness calculations for each sample. NaturalizeDither Last and definitely not least in the dither-fest: Naturalize! This dither is often considered best by listeners. It works on every genre, at every sample rate. It adds no tonal color to the audio, and the noise it produces is quiet… but more than […]


TL;DW: TPDF variant with noise like reel-to-reel tape. TapeDither I thought I had it all worked out. Put out a proper, well-coded TPDF dither, the highpassed variation on it I’ve called PaulDither, and move on to the fancy boutique stuff. But there was this one experiment I had in mind. If you could do the […]


TL;DW: Spatial positioning and clarity dither. SpatializeDither Spatialize is one of my high-performance boutique dithers. Though I think my Naturalize beats it, that’s a preference: I like digital sound to sound organic and real, and I like ambience and foggy distance and other things Naturalize is great at emphasizing. Spatialize is also good at reverb […]


TL;DW: Retro ‘groove crackle’ dither with fuller sound. VinylDither To explain this dither, I’ve got to talk about SACD (DSD) a little. There’s a super-hi-fi digital format known as DSD (direct stream digital). It uses a sample rate in the megahertz, but not as many bits (as few as one, even!) and is tricky to […]


TL;DW: If you like truncation and artificial vibe, try this! HighGlossDither Here’s an Airwindows science experiment! The idea here was to identify things about truncation that some people (maybe crazy people, but people nonetheless) like, and build them into a dedicated dither. This video includes extensive exploration of truncation, TPDF and flat dithers besides HighGlossDither, […]


TL;DW: Single pole highpassed TPDF dither. PaulDither As long as we’re making TPDF dithers, here’s something worth noticing, and a shout-out to a great person. In a public Facebook discussion on dither, Paul Frindle (Sony Oxford, and the DSM 2 ‘prismatic compressor’) suggested his own preferred solution, in general terms: “The one we use most […]

TPDF Dither

TL;DW: TPDF Dither. TPDFDither This kicks off a pretty big Airwindows project: porting all of my dither and noise shaping algorithms to VST for free. Technically, I have a for-pay plugin that contains them, and ought to wait for that funding goal: however, Ditherbox has always contained stuff that’s in other free plugins and serves […]


TL;DW: The ‘One Weird Trick’ perfect boost/pad, with a catch! BitShiftGain Just when you thought we were done with gain… In order to support the next set of Airwindows plugins, which are dither plugins both common and bizarre, here is one final trick for clean gain aficionados. Turns out the only way to get cleaner […]

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