Stem attachment point
The point on the notehead where the stem attaches.
What it means
The stem attachment point is the spot on the notehead where the stem is attached. Depending on the position of the notehead on the staff, the stem is attached either at the upper right or the lower left of the notehead, and this exact point is called the stem attachment point.
In the notation
If a note lies on or above the middle staff line, the stem points downward and attaches on the left of the notehead; if it lies below, the stem points upward and attaches on the right. This rule ensures that stems within a group of notes do not collide with neighbouring noteheads and that the notation stays clear.
Musical use
The stem attachment point matters especially for music engraving and notation software, since a wrongly attached stem direction can make the notation hard to read. In both handwritten and printed notation, the choice of stem attachment follows fixed, widely standardised rules that apply to single parts as well as to multi-part writing with opposing stem directions.
The stem attachment point should be distinguished from the stem itself, which denotes the whole vertical line, and from the notehead, the oval or round element that indicates the pitch. The stem attachment point is only the connecting point between the two.
Performance practice
When writing notation yourself, pay attention to the correct side of the stem attachment, especially when notating multiple parts and needing to distinguish voices with opposing stem directions. When reading irregularly written manuscripts, knowing this rule helps you securely identify the notehead despite unusual stem placement.