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In the previous tutorial I showed you how Impulse Responses (IRs) have revolutionised the world of recording over the past 20 years. What started out as a way of creating authentic reverbs by modelling physical spaces has diversified significantly. They're increasingly relevant to guitarists, as IRs are used in studios to replicate the sounds of speaker cabinets, and indeed, whole recording chains. They're quick, simple to use, readily available and significantly cheaper than their hardware counterparts. Let’s look at how this is typically achieved. Hardware or Software Hardware By this I’m referring to using an amp, or perhaps even just a pedal, as there are an increasing number of ‘amp-in-a-box’ pedals available. Perhaps it’s an advanced modelling unit, such as the Line6 Helix , or Fractal Audio’s AxeFX . If it’s the amp, check to see if it can handle silent recording . This is an amp with a built-in loading facility so it doesn’t require speakers. If the amp doesn’t...

Compressing files when transferring them over the internet has a lot of advantages. In most cases, the combined total size of all the files in the compressed format comes down by a nice margin. This means that you will save some of your bandwidth, and users will also get faster download speeds. Once the users have downloaded a file, they can decompress it whenever they want. In short, compression can make serving files over the internet a lot easier for you as well as your visitors. One factor that can discourage you from compressing files or make the process very tiresome is the fact that you might be doing it manually. Luckily, PHP comes with a lot of extensions that deal specifically with file compression and extraction. You can use the functions available in these extensions to automatically compress files in PHP. This tutorial will teach you how to zip and unzip (compress and extract) files to and from a zip archive in PHP. You will also learn how to delete or rename files in an...

Today, we're going to learn how to use the Symfony event dispatcher component, which allows you to create events and listeners in your PHP applications. Thus, different components of your application can talk to each other with loosely coupled code. What Is the Symfony Event Dispatcher Component? You may be familiar with the event-observer pattern, which allows you to define listeners for system-generated events so that they are executed when the event is triggered. Similarly, the Symfony EventDispatcher component allows you to set up a system in which you could create custom events and listeners. In that way, you allow components in your application to react if something happens in a system. In fact, the event dispatcher component provides three elements that you could build your app architecture around:   event, listener, and dispatcher. The whole system is orchestrated by the dispatcher class, which raises events at appropriate points in an application and calls listeners as...

What Is Test-Driven Development? Test-driven development (TDD) simply means that you write your tests first. You set the expectations for correct code up front, before you have even written a single line of business logic. Not only does TDD help make sure that your code is correct, but it also helps you write smaller functions, refactor your code without breaking functionality, and understand your problem better.  In this article, I'll introduce some of the concepts of TDD by building a small utility. We will also cover some of the practical scenarios where TDD will make your life simple. Building an HTTP Client With TDD What We'll Be Building We'll be incrementally building a simple HTTP client that abstracts various HTTP verbs. To make the refactors smooth, we will follow TDD practices. We will be using Jasmine, Sinon, and Karma for testing. To get started, copy  package.json ,  karma.conf.js , and webpack.test.js  from the sample project, or just clone the...