A voice is a musical line or part which can have its own rhythm independently of other voices on the same staff. Voices are sometimes called "layers" in other notation software.
You can have up to 4 voices on each staff line. In a polyphonic measure, voice 1 usually takes the up-stem notes and voice 2 takes the down-stem notes.
N.B. Be careful not to confuse the concept of MuseScore voices (1, 2, 3, 4) with the order of voices found in vocal scores (SATB etc.). In particular, when creating a closed SATB score, use only (MuseScore) voices 1 and 2 for both upper and lower staves. There is no need to use (MuseScore) voices 3 and 4 unless there are more than two parts in the same staff.
The following instructions show you how to notate a passage of music in two voices:
Enter voice 1 notes first: Make sure you are in note input mode : the Voice 1 button becomes highlighted in blue in the toolbar. Enter the notes in the top voice first. When inputting, some notes may have down-stems, but these will flip automatically when the second voice is added.
The following excerpt shows a treble staff with just the voice 1 notes entered:
Move cursor back to start of section: When you have finished entering a section of voice 1 notes, press the ← key repeatedly to move the cursor, note-by-note, back to the first note of the section; or alternatively use Ctrl+← (Mac:Cmd+←) to move the cursor back one measure at a time. Or else you can simply exit note input mode (press Esc) and click directly on the first note.
Enter voice 2 notes: Make sure you are in note-input mode and that the voice 1 note at the beginning of the section is selected. Click on the "Voice 2" button (on the right of the toolbar), or use the shortcut Ctrl+Alt+2 (Mac: Cmd+Option+2). Enter all the lower voice notes (down-stem).
The following image shows the above example after the addition of voice 2 notes:
All rests can be made invisible if required (select the rest and press V, or uncheck the "Visible" checkbox in the Inspector). Rests in voices 2, 3 or 4 can also be deleted but it is not usually recommended: make them invisible instead. Rests in voice 1 cannot be deleted.
If a rest has been deleted in voices 2-4, you will need to restore it before you can enter a note on that beat in that voice (the problem may arise, for example, in imported XML or MIDI files). The easiest way to fix such a measure is to exchange that voice with voice 1 twice. For the exact method, see Exchange voices of notes (below).
To swap the notes between any two voices:
Notes: (a) The selection can encompass content of any voice, but only two will be processed at once. (b) If you select a partial measure the operation will still apply to the whole measure.
You can also move notes from one voice to another (without note-swapping):
Note: For a successful move, the following conditions need to be met: