Callback adaptation techniques

This document describes a callback adaptation technique developed for the PortAudio port on ASIO. This method handle buffers of different sizes and guarantee lowest latency added by buffer size adaptation

Faust audio DSP language for JUCE

International audienceFaust [Functional Audio Stream] is a functional programming language specifically designed for real- time signal processing and synthesis [1]. It consists of a compiler that translates a Faust program into an equivalent C++ program, taking care of generat- ing the most efficient code. JUCE is an open-source cross-platform C++ application framework devel- oped since 2004, and bought by ROLI1 in Novem- ber 2014, used for the development of desktop and mobile applications. A new feature to the Faust environnement is the addition of architectures files to provide the glue between the Faust C++ output and the JUCE framework. This article presents the overall design of the architecture files for JUCE

Adding Automatic Parallelization to Faust

International audienceFaust 0.9.9.5 introduces new compilation options to do automatic parallelization of code using OpenMP. This paper explains how the automatic parallelization is done and presents some benchmarks

An Algebraic approach to Block Diagram Constructions

International audienceWe propose an algebraic approach to block diagram construction as an alternative to the classical graph approach inspired by dataflow models. This block diagram algebra is based on three binary operations : sequential, parallel and recursive constructions. These operations can be seen as high level connection schemes that set several connections at once in order to combine two block diagrams to form a new one. Such algebraic representations have interesting applications for visual languages based on block diagrams. In particular they are very useful to specify the formal semantic of these languages

MidiShare joins the Open Source Softwares

International audienceMidiShare is a realtime, multi-tasks operating system dedicated to musical MIDI applications. It was awarded the Apple Trophy (1989), the Paris-City price (1990) and more recently, the Max d'Or at the Bourges International Musical Software Competition (1999). Multi-platform support, powerful inter-applications communication, accurate realtime performances are among the significant services provided by the kernel. Freely available on the Internet to developers since several years, MidiShare is now supported by a growing number of projects. Its developers mailing list count 250 members on average. The MidiShare project itself is reaching a state which requires a different management policy: the MidiShare source code is now publicly available to allow collaborative contributions over the Internet. The poster session will present this new project, including changes in the kernel architecture, the source code portability issues and the organization of the collaborative development over the Internet

Compiling Faust audio DSP code to WebAssembly

After a first version based on asm.js [4], we show in this paper how the Faust audio DSP language can be used to generate effi cient Web Audio nodes based on WebAssembly. Two new compiler backends have been developed. The libfaust library version of the compiler has been compiled for the Web, thus allowing to have an effi cient compilation chain from Faust DSP sources and libraries to audio nodes directly available in the browser

FAUST Domain Specific Audio DSP Language Compiled to WebAssembly

International audienceThis paper demonstrates how FAUST, a functional programming language for sound synthesis and audio processing, can be used to develop efficient audio code for the Web. After a brief overview of the language, its compiler and the architecture system allowing to deploy the same program as a variety of targets, the generation of WebAssembly code and the deployment of specialized WebAudio nodes will be explained. Several use cases will be presented. Extensive benchmarks to compare the performance of native and WebAssembly versions of the same set of DSP have be done and will be commente

Elody : a Java+MidiShare based Music Composition Environment

International audienceThis paper introduces Elody, a MidiShare compatible music composition environment developed in Java. The heart of Elody is a visual functional language derived from the G-Calculus. The languages expressions are handled through visual constructors and Drag and Drop actions allowing the user to play in realtime with the language

IMUTUS Score Processing Components

International audienceIMUTUS is an IST European project that aims at the development of an open platform for training students on the recorder. Among the results of the project are two open source libraries for music representation and graphic notation: the MusicXML library, intended to support the MusicXML format and to provide music notation exchange capabilities, and the GUIDO library that provides a powerful graphic score engine. This paper introduces both libraries and describes their use in IMUTUS system

TIMING MEASUREMENTS IN JACK2

Timing measurements allow developers to help under- standing the behaviour of their JACK based applications. The server code base now allows to record various tim- ing while the server and clients are running and generate scripts to interpret them