Assertion: accordion | /r/CapableOf | press key
Facets:
Source sentences:
text: It is played by compressing or expanding a bellows, while pressing buttons or keys, causing valves called pallets to open which allow air to flow across strips of brass or steel called reeds that vibrate to produce sound inside the body.
text: Likewise, on a piano playing the keys more forcefully creates a louder sound (because the hammers are hitting the strings harder); on an accordion pressing the keys opens the reed valves and although the distance the valve is open can affect the volume, the amount of force with which the valve opens does not, so pressing keys forcefully on accordion accomplishes nothing except to wear out the valves.