jackclock is a puredata external, enabling jack transport in pd patches. This allows for playhead synchronization with other jack transport enabled applications like ardour, Hydrogen and rosegarden. In addition the jack freewheel mode allows for "faster than real-time" and can be used for exporting audio and/or data files. The example provided in the source code records a 100 seconds long sound file as fast as the CPU can, but notice however that sound card IOs are disabled when freewheel mode is enabled. jackclock has been developed in the context of the open orchestra project.

10 March 2011

nstream~ is a puredata external for multichannel uncompressed audio streaming over UDP for low latency transmissions. nstream~ and nsreceive~ parameters can be dynamically configured. Fixed point data and multicast are supported. nstream~ has been developed as part of the audioscape project and is also distributed with the pdsheefa library.

pd-nstream-1.0.tgz for Linux and Darwin
5 January 2011

Sorry, image display issue This book is a minor revision of my Ph.D. thesis (written in French and defended November 14th 2006). I am grateful to the Éditions universitaires européennes for kindly proposing to publish this work. Abstract: «The design of Distributed Interactive Multimedia Applications (DIMA) on Internet opens new perspectives to work and to have fun in a collaborative way. However, network transmission delays introduce temporal ambiguities that my be perceived at the user interface. On the other hand, ambiguities due to unexpected message delivery is well-known under the name of consistency. A first contribution of this thesis is to enable the use of newly defined temporal properties (instantaneity, simultaneity and Delta legality) into the consistency problem, allow to take into account psycho-perceptive constraints. Relationship with well known scheduling properties are also provided. From these definitions, a new consistency model framework have been proposed, along with the perceptive consistency and related protocols. Results have been implemented in our Networked Musical Performance prototype (NMP), enabling a distributed metronome shared between remote musicians. This have been shown to be robust to high latencies introduced by remote communications. Public demonstrations and user experiments have also shown practical effectiveness, as well as limitations. Moreover, results have been transposed to distributed online gaming.» Get it at amazon.ca, amazon.com, or amazon.fr
24 November 2010
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