Audio of or associated with a trumpet, horn, and so on, without having valves or keys, on which only notes of the harmonic number of the keynote is often received CowperKettleCowperKettle 36.7k1818 gold badges138138 silver badges235235 bronze badges 2 Took me some time to discover how this reply does actually https://hairfallcontrolcomboformen.blogspot.com/