Extending Open-Source Audio Embedded System:\\ A Pedal Pi Components Study Case

Audio plugins processing equipment that serve beginner instrumentalists have limitations regarding of extension for physical control and integration with other equipment, limiting the execution and the creation performances.Open-source projects allow their adaptation or extension by modifying the code or by integrating components that comply with some specification. Pedal Pi, a low-cost open-source DIY project, enables the development of software components for producing HMIs through a specified API.In this paper, components are developed that allow the control of the Pedal Pi by means of applications for mobile devices.For this, a bibliographic review of open-source solutions for the embedded processing of audio plugins is performed, an analysis of the extension points offered by the Pedal Pi software architecture is realized, the control components developed are presented and are discussed the results and the contribution relationships among the open-source musical projects.