<?xml version="1.0" encoding="utf-8"?><metadata xmlns:dc="http://purl.org/dc/elements/1.1/"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dcterms="http://purl.org/dc/terms/"><dc:title xml:lang="en">ondes Martenot</dc:title><dc:identifier>http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31395230</dc:identifier><dc:language>en</dc:language><dc:publisher xml:lang="en">Getty Institute</dc:publisher><dcterms:created>2026-03-30 20:54:47</dcterms:created><dcterms:isPartOf xsi:type="dcterms:URI">http://AATesaurus.cultura.gencat.cat/aat/getty_en</dcterms:isPartOf><dcterms:isPartOf xml:lang="en">Tesaurus d&apos;Art i Arquitectura</dcterms:isPartOf><dc:format>text/html</dc:format> <dcterms:alternative xml:lang="en">ondes musicales</dcterms:alternative> <dc:description xml:lang="en"><![CDATA[ Monophonic, nonimitative electronic instruments, invented by Maurice Martenot in 1928. The tone is generated by the heterodyne action between a fixed and a variable radio-frequency oscillator, the latter being controlled by a seven-octave keyboard and the relative proximity of the player's hand to a horizontally stretched cord. ]]></dc:description></metadata>