Music notation is facing new musical forms such as electronic and/or interactive music, live coding, hybridizations with dance, design, multimedia. It is also facing the migration of musical instruments to gestural and mobile platforms , which poses the question of new scores usages on devices that mostly lack the necessary graphic space to display the music in a traditional setting and approach. Music scores distributed and shared on the Internet start also to... Lire la suite

Music notation is facing new musical forms such as electronic and/or interactive music, live coding, hybridizations with dance, design, multimedia. It is also facing the migration of musical instruments to gestural and mobile platforms , which poses the question of new scores usages on devices that mostly lack the necessary graphic space to display the music in a traditional setting and approach. Music scores distributed and shared on the Internet start also to be the support of innovative musical practices, which raises other issues, notably regarding dynamic and collaborative music scores. This paper introduces some of the perspectives opened by the migration of music scores to mobile platforms and to the Internet and it presents the approach adopted with INScore, an environment for the design of augmented, interactive music scores.

Le développeur d'une application musicale est souvent confronté à des problèmes difficiles à résoudre, notamment parce qu'ils sont relatifs à la maîtrise du temps. Le manque de support des systèmes déxploitations courants, l'absence de standard, les problèmes de portabilité qui en résultent ne facilitent pas la tâche du programmeur. Nous présentons MidiShare, une architecture logicielle qui a été conçue dans le but de couvrir les besoins des applications musica... Lire la suite

Le développeur d'une application musicale est souvent confronté à des problèmes difficiles à résoudre, notamment parce qu'ils sont relatifs à la maîtrise du temps. Le manque de support des systèmes déxploitations courants, l'absence de standard, les problèmes de portabilité qui en résultent ne facilitent pas la tâche du programmeur. Nous présentons MidiShare, une architecture logicielle qui a été conçue dans le but de couvrir les besoins des applications musicales de manière homogène, durable et portable. Nous montrons également à travers plusieurs exemples, comment cette architecture facilite le développement, notamment grâce à des mécanismes simples et efficaces de gestion du temps et de communication en temps réel.

L'utilisation de réseaux sans fil dans le domaine musical ouvre des perspectives prometteuses, tant d'un point de vue artistique que technique. Ce domaine d'application impose cependant des contraintes de fiabilité et de temps réel spécifiques. Nous avons donc mesuré les performances de 802.11b en fonction de ces contraintes et nous présentons les résultats correspondants ainsi que leur analyse.

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. Fina... Lire la suite

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.

Exchange of time stamped events between different stations raises the problem of the clock frequencies difference as soon as one station try to compensate for the transmission delay and to render the events with a minimum time distortion. We propose a simple, efficient and low cost method to compensate for the clock frequencies difference. This method rely only on regular time stamped packets transmissions and may be used in many cases. It provides good perform... Lire la suite

Exchange of time stamped events between different stations raises the problem of the clock frequencies difference as soon as one station try to compensate for the transmission delay and to render the events with a minimum time distortion. We propose a simple, efficient and low cost method to compensate for the clock frequencies difference. This method rely only on regular time stamped packets transmissions and may be used in many cases. It provides good performances to the receiver station in regard of the sender reference time even on a heavily loaded communication channel. It operates also very efficiently on a low latency local network