Download JavaScript for sound artists: learn to code with the Web by William Turner, Steve Leonard PDF

By William Turner, Steve Leonard

Learn how one can application JavaScript whereas growing interactive audio purposes with JavaScript for Sound Artists: discover ways to Code With the net Audio API! William Turner and Steve Leonard show off the fundamentals of JavaScript language programing in order that readers can the way to construct browser dependent audio functions, similar to track synthesizers and drum machines. The spouse web site bargains extra chance for growth. Web Audio API guideline contains oscillators, audio dossier loading and playback, uncomplicated audio manipulation, panning and time. This publication encompasses all the uncomplicated gains of JavaScript with elements of the internet Audio API to intensify the potential of any browser.

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Extra resources for JavaScript for sound artists: learn to code with the Web Audio API

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The square variable is assigned to the currentWaveform variable in the following line: currentWaveform = square; Notice that no new declaration is required for the currentWaveform variable to assign (and replace) whatever was previously assigned to it . The new data on the right side of “=” is assigned to currentWaveform . If you launch your web browser, you will hear a square wave play . In programming, being able to overwrite variables in this manner is referred to as mutability (changeability), and we say that variables are mutable .

Log(freq); freq -= 100; } When to Use for Loops and When to Use while Loops The rule of thumb for deciding whether to use a for or while loop is that a for loop is typically used when you know the number of iterations that are needed to complete the loop, and a while loop is used when you don’t know how many iterations are needed to complete the loop . Summary In this chapter, you have learned how to incorporate decision-making into your programs using conditional statements . You have also learned how to use loops to accomplish tasks quickly and how loops can be leveraged when working with arrays .

Length; i+=1){ if(arguments[0] === waveforms[i]){ waveformValid = true; } } if(waveformValid === false){ throw "please enter sawtooth, sine, triangle or square as an argument" } } playOsc("fat beats"); /*___Error: Uncaught please enter sawtooth, sine, triangle or square as an argument___*/ playOsc("square"); //___works Function Scope Scope is a concept that defines how one part of a program can access variables in another part of a program . In the ECMAScript 5 version of JavaScript, there are only two forms of scopes: a global scope and function scope (also called a local scope) .

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