If it sounds dark, its sound lets you recreate the darkness of the seams and anticipate the efforts of the work to bring it to light?
Thomas Döller investigated this question and researched the sound of coal by using it to build flute instruments.
It combines mouth plates made of coal with tubes made of titanium, brass or silver. A rarely occurring type of coal proves to be ideally suited for this: Cannel coal, which has been sawn and filed to give an ideal blowing edge for producing a cutting tone on the flute.
In his concerts, he plays with Jürgen Schwalk the newly developed bass flutes made of coal and titanium, whose wide range of sounds is microphoneized and amplified and thus made audible. Percussive and polyphonic sound layers form the basis for an exciting musical dialogue between coal and steel.
You can find more information here: www.thomasdoeller.de