variable pitch

Adam Neely explains what perfect (absolute) pitch is, how it differs from relative and quasi-absolute pitch, and why he would not want it. He covers its drawbacks, including drift with age.

Rick Beato argues that adults cannot develop true perfect pitch, which he ties to critical-period brain plasticity and language acquisition. He says it can only be developed in young children, and discusses the research behind this.

Rick Beato discusses a theory of why some children develop perfect pitch, based on early exposure to music. He draws on his experience with his own children.

12tone tells the story of pitch inflation and how concert A came to be standardized at 440 Hz, including attempts at legal standards. It is a short music history explainer.

Ali G pitches his ice cream glove idea to marketing professionals and even talks to Donald Trump. It is a comedy sketch of a clueless entrepreneur seeking investment.

Neil and Laura Westwood pitch their Magic Whiteboard, reusable static-cling whiteboard sheets, to the investors on the BBC's Dragons' Den and win 100,000 pounds of investment.

Engineering Explained compares Lexus's steer-by-wire yoke on the RZ 450e with Tesla's yoke. It covers how steer-by-wire works and how variable steering ratios address the yoke's flaws.

A scene from The Big Short in which Jared Vennett pitches credit default swaps on mortgage bonds to a hedge fund team, using a Jenga tower to illustrate collateralized debt obligations.

Veritasium explains quantum entanglement and spooky action at a distance, walking through Bell's inequality and the experiments that rule out hidden variables, in under ten minutes.

A short street-level clip of Joe Ades, the New York pitchman who sold vegetable peelers to crowds on the sidewalk. It shows his patter, showmanship and crowd handling in action.

Simon Sinek's TEDx talk arguing that great leaders and companies inspire action by communicating why they do something before how or what. He uses Apple as his main example.

MC Frontalot's nerdcore rap about the text adventure Zork, made for Jason Scott's Get Lamp documentary and featuring a cameo by Steve Meretzky. It was filmed over an evening in a basement.

MinutePhysics, with 3Blue1Brown, explains Bell's theorem using a Venn diagram paradox and polarizing filters. It shows why no local hidden variable theory can reproduce quantum correlations.

A five-minute demonstration of the Shepard tone, an audio illusion made from octave-separated tones that makes pitch seem to rise endlessly without ever getting higher.

A PBS Space Time episode introducing de Broglie-Bohm pilot wave theory, an interpretation of quantum mechanics that avoids much of the strangeness of the mainstream views. It is aimed at curious lay viewers.

A CollegeHumor sketch from the Hardly Working series in which a pair of startup founders pitch a website using incomprehensible buzzwords and branding nonsense. It parodies Silicon Valley startup culture.

Alexander Nix of Cambridge Analytica presents at the 2016 Concordia Summit on using big data, psychographic profiling and behavioral microtargeting in elections.

CGP Grey argues that a classroom works well only for the one student pitched at the average level, and sketches a future of personalized instruction. It introduces the idea of a Digital Aristotle, a tutor for every learner.

A short RepresentUs explainer on how money corrupts American politics and what an anti-corruption act could do about it. It covers lobbying, super PACs and campaign finance, and pitches the group's proposed reforms. The video was later superseded by an updated version.

An excerpt from Steve Jobs's January 2007 Macworld keynote in which he introduces the original iPhone. It shows the pitch of a phone, music player and internet communicator, along with the live demo.

A 1997 interview with Jeff Bezos taped at a Special Libraries conference, where he explains why Amazon started with books and why the web made it possible. He calls it the Kitty Hawk stage of electronic commerce.

Clickspring makes the pin-and-slot epicyclic gearing of the Antikythera Mechanism, the module modelling the Moon's variable motion in the Greek theory, by hand.

An Adult Swim fake infomercial in which Alan Resnick pitches a four-step program for creating a digital avatar to live forever. It is absurdist satire of tech immortality and digital popularity.

YC partner Michael Seibel discusses his essay on real product-market fit, why founders wrongly believe they have it, and how building a company is not a single-variable problem, drawing on Justin.tv and Socialcam.

Inventor Marc Griffin pitches his game Bulletball to the American Inventor judges. The clip shows a long, costly commitment to a game idea.

The original 2012 screencast introducing Meteor, a JavaScript framework for building web apps quickly. It demonstrates realtime updates, latency compensation and low boilerplate.

A short clip of the Super Mario Bros 3 proof-of-concept PC port built by id Software's founders to pitch Nintendo on a PC version. Nintendo passed, and the same technology led to Commander Keen.

A short vintage clip introducing Microsoft Excel in 1990, widely known for its elevator-themed commercial. It shows how spreadsheet software was pitched in that era.