Mid-staff instrument changes
When a musician is required to double on a different instrument for a section of a piece, the instruction to switch instruments is generally placed above the staff at the beginning of that section. A return to the primary instrument is handled in the same manner.
MuseScore enables users to insert a special class of text called Change Instrument text for this purpose. This class of text is different from either Staff or System text in that it links the text to the playback and changes the sound to the new instrument. There are, however, several limitations to the functionality of this feature in 2.0.x, and these should be understood before attempting to use it.
Automatic transposition from concert pitch to the appropriate key for the transposing brass and woodwind instruments is not currently supported. For changes to instruments notated in a different key (C flute to Eb flute; Oboe to English Horn, etc.), the use of ordinary Staff Text to indicate the change is preferable, and the transposition must be done after the music is entered (using Notes>Transpose from the main menu). To avoid discord on playback, the instrument assigned to that staff should be muted in the F10 Mixer.
If it is necessary to hear the new instrument sound on playback, the Change Instrument text function must be used. However, after a mid-staff instrument change where the two instruments on the staff are not notated in the same key, no attempt should be made to enter new music directly from the keyboard. Instead, the music must be (a) pasted in, or (b) entered before the instrument change is effected. New input into measures following an instrument change is subject to two known program bugs, which cannot be resolved in the current 2.0.x versions without adversely affecting backwards compatibility. (This has been fixed for the next stable release, v.3.0.) In addition, the score must remain notated in concert pitch, or discord will result from the transposition. As a convenience to the players, a copy of the part may be saved as a separate file and the required sections transposed to the appropriate key before the part is printed. (Note that transposing a linked part will affect the score as well.)
When changing from one concert-pitch instrument to another, or from one transposing instrument to another in the same key (Bb trumpet to Bb cornet or Flugelhorn, etc.), the Change Instrument Text may be used to ensure that the playback sound is altered to the new instrument. Input may be done in the usual manner, and is not affected by the bugs mentioned above.
Add an instrument change
- Select the start point of the change by clicking on a note or rest.
- Open the main palette by typing F9 (or by using the View menu), and click on Text to open the text sub-palette.
- Double-click on Instrument
- The word "Instrument" will appear above the anchor note or rest.
- Double-click the word "Instrument", then type Ctrl+A to select all of it.
- Type the actual text you wish to appear in the score, then click outside the box to exit text edit mode.
Right-click the text and choose "Change Instrument…"
Choose the instrument, then click OK