(b) high performance audio tools e.g. supported by Forschungszentrum Telekommunikation Wien (FTW <ref xmlns="http://www.tei-c.org/ns/1.0" target="http://www.ftw.at/">http://www.ftw.at/</ref>) or Phonogrammarchiv at the AAS <ref xmlns="http://www.tei-c.org/ns/1.0" target="http://www.phonogrammarchiv.at/">http://www.phonogrammarchiv.at/</ref>,