Organ pipe sound synthesis

Signal Model Based Synthesis of the Sound of Organ Flue Pipes
Típus: 
Hallgatói
Kezdés éve: 
1998
Befejezés éve: 
1999

Tanszéki projektvezető

A munkatárs fényképe
habilitated associate professor
Szoba: IE416
Tel.:
+36 1 463-4114
Email: sujbert (*) mit * bme * hu

Contact information

Koordinátor: 
BME MIT DSP labor

Bemutatás

Offering small, portable and more economical organs for home, studio and stage applications is a long-standing problem in the research of sound synthesis methods. The well-known PCM or Sampling synthesis, which records the sound, loops it and plays it back cannot take into account the stochastic parameters of the sound. During this project, another method has been developed, which models also these effects. Signal model based synthesis could be a well-balanced compromise between computation efficiency and sound quality. As most of the musical instruments generate nearly periodic sound, the signal model is based on the discrete-time model of the periodic signals. The final organ-model has been set during the experiments. The model has three part with three different function: generator part (the periodic model and a noise generator, transient part (responsible for the attack and decay transient behaviour of the sound, using independent IIR filters, as envelope-generators), other effects part (includes the effect of the different position of the sound, the effect of the hall (reverberation), etc.). During the project, the following methods have been developed: An analysis program, which extracts the required parameters from measured sound samples. An off-line synthesis program, which converts MIDI files to WAVE files using the parameters. A real-time implementation of the model on a Digital Signal Processor. More information and demo recordings are available on the official homepage of the project.

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