Maniquet asked an instrument maker to reproduce a brass carnyx of the same size. The archaeologist worked with experts from the acoustics laboratory at the Maine-CNRS University in Le Mans, headed by Joël Gilbert, a brass instruments specialist, who carried out an in-depth analysis of the specimen.
A study presented by a group of researchers and instrument makers in Le Mans last month, revealed that the resonance frequency determined the series of playable notes. In a well-designed instrument this resembles a harmonic series. If the musician had the base note he could easily produce others (mainly octaves, fifths and thirds), by modulating air flow and lip tension.
so what did it sound like? Video