Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Aircraft Equipment Problem Less Severe; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Aircraft Equipment Problem Dissipated
Aircraft
While descending into ZZZ; we experienced a dirty sock/musty smell starting around FL180.  The smell dissipated as we descended; and was completely gone during approach and landing.  The #1 Flight Attendant (F/A) called at 4;000 feet; and reported that they were experiencing the smell throughout the airplane.  I spoke to the FA after landing and the FA did not report that any customers had complained.  To date; neither myself nor First Officer have experienced any physical problems.  No further input.
A320 Captain reported a fumes event during descent starting at FL180. Fumes dissipated gradually and completely dissipated during approach and landing.