INScore OSC Messages Reference v.0.96

manualINScore scripting API version 0.96. INScore is a system for the design of live music scores. It is basically driven by OSC messages. This document describes the set of OSC messages supported by the system

Audio Cards Clock Skew Compensation over a Local Network

This paper is the continuation of a previous work done on clock skew compensation over a high latency network. It evaluates the efficiency of the EPTMA clock skew detection algorithm applied to real-time audio streaming over a local network. The presented results include real world apparent deviations of audio card clocks and acuracy of the skew detection. It appears that EPMTA is very suitable to measure clocks deviation in the context of audio transport. Finally, a simple method to compensate for the clock skew is presented, mainly to evaluate a complete solution for audio streaming

RTP MIDI : Recovery Journal Evaluation and Alternative Proposal

An RTP payload for MIDI commands is under development. As a part of this draft, a default resiliency mechanism for the transport over lossy networks defines a journalling method called recovery journal. But the theoretical size of this recovery journal can be very large and its format is complex. This report will present an empirical evaluation of the recovery journal size based on a few MidiFiles. We will also propose an alternative solution for the resiliency of RTP MIDI streams based on the combined use of redundancy and retransmissions. Our solution is simpler and might be interesting for some scenarios, typically: short grouping times, complex streams or unconventional semantics

Miroirs technologiques pour la pratique instrumentale

La pratique d'un instrument de musique, le travail instrumental, son apprentissage, peuvent être vus comme des activités où le feedback joue un rôle prépondérant. Les technologies actuelles permettent d'envisager l'extension des pratiques instrumentales comme une extension du feedback fournit à l'instrumentiste, aussi bien dans les domaines sonores que visuels. Ce sont ces perspectives nouvelles qui sont présentées, avec leurs implications pour le travail instrumental et leurs applications dans le domaine pédagogique

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

Gesture cutting through textual complexity: Towards a tool for online gestural analysis and control of complex piano notation processing

International audienceThis project introduces a recently developed prototype for real-time processing and control of complex piano notation through the pianist’s gesture. The tool materializes an embodied cognition-influenced paradigm of interaction of pianists with complex notation (embodied or corporeal navigation), drawing from latest developments in the computer music fields of musical representation (augmented and interactive musical scores via INScore) and of multimodal interaction (Gesture Follower). Gestural, video, audio and MIDI data are appropriately mapped on the musical score, turning it into a personalized, dynamic, multimodal tablature. This tablature may be used for efficient learning, performance and archiving, with potential applications in pedagogy, composition, improvisation and score following. The underlying metaphor for such a tool is that instrumentalists touch or cut through notational complexity using performative gestures, as much as they touch their own keyboards. Their action on the instrument forms integral part of their understanding, which can be represented as a gestural processing of the notation. Next to the already mentioned applications, new perspectives in piano performance of post-1945 complex notation and in musicology (‘performative turn’), as well as the emerging field of ‘embodied and extended cognition’, are indispensable for this project

Syntactical and Semantical Aspects of Faust

International audienceThis paper presents some syntactical and semantical aspects of FAUST (Functional AUdio STreams), a programming language for real-time sound processing and synthesis. The programming model of FAUST combines two approaches : functional programming and block-diagrams composition. It is based on a block-diagram algebra. It has a well defined formal semantic and can be compiled into efficient C/C++ code

Optimized Lock-Free FIFO Queue continued

We have proposed algorithms for lock-free lifo and fifo queue management. This technical report proposes an improved version of the lock-free fifo management algorithm previously defined

Multicore technologies in Jack and Faust

International audienceTwo ongoing research projects at Grame aim at providing efficient solution for audio applications on many/multi core systems. The first one is Jack- dmp, a C++ version of the Jack low-latency audio server for multi-core machines. The second is Faust, a compiled DSP language with auto parallelization features. This paper will briefly describe these two projects focusing on multi-core related questions

Real-Time Score Notation from Raw MIDI Inputs

This paper describes tools designed and experiments conducted in the context of MIROR, a European project investigating adaptive systems for early childhood music education based on the paradigm of reflexive interaction. In MIROR, music notation is used as the trace of both the user and the system activity, produced from MIDI instruments. The task of displaying such raw MIDI inputs and outputs is difficult as no a priori information is known concerning the underlying tempo or metrical structure. We describe here a completely automatic processing chain from the raw MIDI input to a fully-fledge music notation. The low level music description is first converted in a score level description and then automatically rendered as a graphic score. The whole process is operating in real-time. The paper describes the various conversion steps and issues, including extensions to support score annotations. The process is validated using about 30,000 musical sequences gathered from MIROR experiments and made available for public use