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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!



ToTape4Demo is a tape emulation AU universal binary plugin, and the next-generation Airwindows tape emulation. This one can go on the 2-buss! It operates by isolating all the factors in the sound that don’t sound like tape, refining them, and then taking them out of the source material with a single subtract—the input sound is otherwise […]

Iron Oxide 4

IronOxide4Demo is a tape emulation AU universal binary plugin. It’s old school tape emulation. Unlike ToTape, Iron Oxide 4 doesn’t present a realistic tape model with wide-range sound—instead, it traps in the sound in the lows and highs and lets you make it bark. This is the one for putting on isolated tracks and cranking out, […]


ToTape3Demo was the precursor to ToTape4. It’s the ‘high-resolution’, realistic emulation in contrast to Iron Oxide, which is the ‘for effect’, tape-slam sort of plugin. ToTape doesn’t tend to have striking changes in behavior version by version, because it’s toward an emulation target that is itself very high-resolution. It’s about mimicking the tone of magnetic tape […]

Iron Oxide 3

IronOxide3Demo added tape flutter to Iron Oxide, and tuned the antialiasing. This is much like ToTape: the basic concept of the plugin doesn’t change that much, though 3 added flutter and 4 added an inv/dry/wet mix control. These are the tape effects, not there to be radically reinvented each year. If you like this one best, […]

Iron Oxide 2

IronOxide2Demo is the version of Iron Oxide that introduced separate controls for the top and bottom cutoffs of the plugin. It’s got input and output gains, and also was the first Iron Oxide to introduce antialiasing, which it does in an interesting way: it’s applying randomness to the ‘blur’ between adjacent samples, which is a trick […]


ToTape2Demo is the version of ToTape where I brought in antialiasing. The earlier versions of ToTape went through changes mostly relating to the head bump: trying to get it smoother, managing its tendency to become unnaturally enormous. If you like this earlier version of ToTape best, buy the current one and ask me for a copy […]


ToTapeDemo is the start of the ToTape lineage, a set of plugins that have kept on getting closer and closer to the sound of analog tape off a good reel to reel. It started out with four controls: Tape Slam, Treble Soften, Head Bump and Output Level. Quickly it became obvious that ‘tape slam’ was more […]

Iron Oxide

IronOxideDemo was the start of a whole lot! This plugin helped launch Airwindows. It’s an old school tape sim, by which I mean it’s ‘bandpassy’ and distorted. Back in the day, people considered that to be the sound of a ‘tape plugin’. Iron Oxide was largely created as a sort of crusade. I had friends who […]

Chrome Oxide

Chrome Oxide was an alternate technique to go for ‘tape grunge’, originally sold as a separate plugin. It worked like this: it threw in a random noise, but instead of just overlaying the noise onto the sound, it used the noise to interpolate between the current and previous sample. What that did was noise up the […]


Flutter includes mono and stereo versions. It’s a great-sounding tape flutter effect that can be fairly intense, but there’s a problem: because of the design of the algorithm, I never got this version to have correct delay compensation. It does declare tons of latency, but it can’t lock on to the correct delay. It declares a […]


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Kinds Of Things