Assertion: french horn's valve | /r/HasProperty | engaged
Facets:
Source sentences:
text: So, to get mathematical for a moment, say the basic tubing is 8 feet (Bb), when the fourth valve is engaged an extra 4 feet is added to the length making it 12 feet (F) in total (All lengths approx).
text: In addition each of the valves has a compensating “knuckle” of tubing, to put the instrument in tune when valves 1-3 are engaged and the instrument is playing in F.