Features of Analysis of Sound Effects  in the Computing Platform iOS

The iOS system is a computing platform and together is a promising modern environment for the development of various multimedia applications. Using the resources of this platform, the user of the mobile gadget appear essentially unlimited opportunities to create different audio signals. In terms of working with sound, Apple is ahead of its competitors, and this is no accident. The company offers good tools for playing, recording and processing tracks. Thanks to this, on the AppStore you can see a huge number of applications that somehow work with audio content. These include players with good sound (Vox), audio editors with tools for editing and applying effects (Sound Editor), voice changing applications (Voicy Helium), and various musical instrument simulators that give a fairly accurate simulation of the corresponding sound (Virtuoso Piano) , and even simulators DJ-installations (X Djing). To work with audio, Apple provides the AVFoundation framework, which combines several tools. If you need to impose any effect, play several tracks at the same time, mix them, do processing or editing audio, or record sound from the output of a certain audio node, AVAudioEngine will help you with this. Most of all this class attracts the possibility of imposing effects on the track. Just on the basis of these effects is built a lot of applications with equalizers and the ability to change the voice. In addition, Apple allows developers to create their own effects, sound generators and instruments. The algorithm for the study of the most common sound effects based on the use of the capabilities of the iOS information platform has been built. The Model-View-Controller Architecture is described in the form of application components, which is the basis for an experiment on analyzing the features of multimedia content based on the use of mobile gadgets and a special programming language. A simple algorithm for using special frames in an XCode environment was constructed, which allowed testing on a selected sample a series of sound effects. It has been found that the built-in algorithm for analysis of samples based on iOS resources can greatly simplify the process of studying sound signals of various nature, because the simulator tools are described through the code of the programming language, and therefore their configuration is a clear approach to the analysis. In addition, the described elements in the article can be used to create their own sound effects, and at various stages of the design of virtual sound generators.

Ref. 7, fig. 6, tabl. 1.