La forma sonora del pianoforte

Overview

2015 August, 26
TetraREC
Samples

2015 August, 26

Accademia degli Sfaccendati
Palazzo Sforza-Cesarini, Genzano Romano (RM)

Piano Masterclass Mº Roberto Prosseda
Electroacoustics lesson Elena D’Alò, Giuseppe Silvi

TetraREC

TetraREC is a spaced microphone technique which consists in surrounding the complex sound object (musician plus instrument) with four microphones, each at the vertices of an ideal tetrahedron.

The TETRAREC technique took its inspiration from Michael Gerzon’s A-Format (four coincident microphones placed along the sides of a tetrahedron). The difference between the two techniques are the distance (coincident vs. spaced) and the purpose (3D reproduction of music/environment vs. 3D reproduction of acoustic objects).

The TETRAREC technique was developed to achieve the following objectives:

Capture the Sound Shape of acoustic instruments
Preserve the body shadow on sound propagation
Preserve the movements performed by the musician
Collect data on Sound Shapes of different acoustic instruments
Collect data on Sound Shapes of similar acoustic instruments with different performers
Analyse data and prototype a graphic visualisation of 3D Sound Shapes

Samples

Scala cromatica discendente

Roberto Prosseda plays chromatic scale from top to bottom of piano keyboard. The goal is to observe how Sound Shape of piano change with pitch.

Switching from an LF image to others you can describe the Sound Shape of piano and its propagation on space. The LB picture highlights how top cover reflects sounds to front and filter sounds to back.

LF - left front

scala LF