送交者: steven 于 2006-2-18, 21:43:50:
回答: 好几个功能 由 松鼠 于 2006-2-18, 21:32:36:
Well, the middle one is called sostenuto padel keeps raised any damper that was raised at the moment the pedal is depressed, so certain sustain notes may keep ringing. Often only the grand piano has sostenuto padel.