نغمة بالانجليزي

all the notes that a musical instrument or a person's voice can produce, from the highest to the lowest

الأَنْغَامُ المُنْخَفِضَةُ لِلْبْيَانُوْ

The lower registers of piano

نَغْمَةٌ مُرْتَفِعَةٌ/مُتَوَسِّطَةٌ/مُنْخَفِضَةٌ

An upper/ a middle/ a lower register