The Mixer allows you to change instrument sounds, adjust volume and panning, and make other adjustments to the playback for each staff.
To display/hide the mixer, use one of the following:
The Mixer is split into a Details Area on the top and a Track controls Area below.
Displays the Master Gain on the left, and columns of track controls on the right.
Know the difference between the instrument channel (an abstraction in Musescore) and the sound track:
For each set of staff (all staffs of one instrument) in your in your score, MuseScore creates an instrument (abstraction) by reading from a predefined definition file, more info. An instrument contains various details such as notation settings, symbol interpretation settings, sound etc. Each instrument has one or more channel, a channel represents a specific type of sound, similar to the concept of playing technique (e.g. a violin which can play in arco, tremolo or pizzicato, legato, vibrato), or articulation sample in commercial sound libraries.
Each track control is an instrument channel that you can adjust audio and MIDI output settings. You must click on a track control to select first before you can edit it, selecting on the score screen area will not reflect on the Mixer automatically.
Instrument containing more than one channel has an arrow button on top of the parent track control, click the arrow to show or hide all channels. Parent control shadows the first child control, modifing values on parent control modifies all children values. The parent track control is formerly referred to as "part track"
To add or remove channel, or set a default value, you must create a custom instrument by editing and providing your own instruments.xml, more info. You cannot add or remove channel inside Musescore.
For each staff (that can contain a clef symbol) in your score, MuseScore also creates a container that contains exactly four subtracks, which corresponds to the four voices. You can assign an instrument channel to each subtrack separately. Contrary to the concept of sound track in popular DAWs, the Mixer has nothing to do with these subtracks except the ability to mute (jump to).
Expanded parent track control, showing child track controls in pink.
The Master Gain controls the overall output volume. To adjust it, click and drag the slider handle or enter a value in the box underneath.
Instrument containing more than one channel has an arrow button on top of the parent track control, click the arrow to show or hide all channels. Parent control shadows the first child control, modifing values on parent control modifies all children values.
At the top a green S Solo button and a red M Mute button: click to toggle on and off. If any Solo button is checked, unSolo channels are muted regardless of their Mute status. These modify a channel, not voices.. To mute a voice, jump to Mute Voice
The dial below the mute button controls panning left and right. You can click and drag. Note that value 64, not 50, is center pan.
The slider controls the playback volume. This is a final post process output volume. The data size 127 is an arbitrary number not related to MIDI velocity, default 100 value is 90% sound sample volume, more info.
Not to be confused with instrument name in Staff / Part properties.
Display Part name or Channel name
Does not affect score visually.
The details area displays and provides finer control of the currently selected channel.
Not to be confused with instrument name in Staff / Part properties.
Text for display within Mixer only, also known as Part name in Staff / Part properties
Does not affect score visually.
Does not affect sound.
Channel name cannot be modified inside Musescore, use custom instruments.xml instead, more info
Affects the whole instrument:
Changing without understanding will mess up your score audio.
Understand the concept of instrument channels and track controls and voices first, you may not want to edit this, use these instead:
If none of the above options fit, read on to edit sound.
The sound that an instrument channel is pointing to. The data reference method depends on the order of soundfonts in the Synthesizer, pay attention to Synthesizer setting before you close and restart Musescore.
Correct audio won't be produced unless you setup Drumset correctly, you must understand the sound's layout.
The drop-down menu lists every sound from SoundFont loaded in the Synthesizer. They are ordered as the order of soundfont files in the Synthesizer: SF2/SF3 by MIDI Bank first, then SFZs. It is not an alphabetical order. To jump to the sound you desire quickly, while the list is open press on your keyboard (once or more) the first letter of the name.
Sound is formerly named Patch.
Same as volume on track control
Same as panning on track control
Affects whole instrument. For display in Mixer only. To change, click the colored rectangle to pick from the color palette.
Does not affect score visually.
The output MIDI port and MIDI channel.
As of Musescore 3.6.2, MIDI output driver of the program only use 1 port and 16 channels on the operation system.
The reverb and chorus value sent to MIDI out.
Sent to MIDI devices only. Does not affect MuseScore's built in audio playback.
Affects voices of whole instrument instead of current channel.
Mute individual voices. Each row represents a different linked-staff. So pressing '2' on the top row will mute the second voice on the first staff of the part.
This field is different from all others in Mixer, this is the only field that affects the voices of the staff directly.
At the bottom of the detail area is a wide button with a tiny triangle on it. Clicking this button will hide the detail area to give you more room. Clicking on it again will restore the detail area.
Note: From Preferences > Score it is possible to check the box Show MIDI controls in the Mixer to preset it expanded when opening the Mixer.
Understand the concept of instrument channels.
You can also do these instead:
Some instruments come with multiple channels that you can switch audio playback to and from. For example, the build-in string instrument (violin, viola, cello etc.) has three channels: "arco" (or "normal"), "pizzicato" and "tremolo." The build-in trumpet has two channels "open" (or "normal") and "mute".
Switch sound (channel) midway through a score by using a Staff Text. Every subsequent notes will switch to playback the new sound until you use another Staff Text symbol. Eg After 'pizz.' text, to return to normal (arco) later in the piece, you must add 'arco' text. Designate which voice to affect in the text properties.
To switch channel, use Staff Text:
use these 5 build-in Staff Text in the Text palette (pizz., arco, tremolo, mute, open), these affects all voices :
or create custom Staff Text :
NOTE:
There's also S/A, T/B, T/L and B/B texts to separate Soprano, Tenor, Tenor and Baritone (voice 1 and 3) from Alto, Bass, Lead and Bass (voice 2 and 4), respectively, on closed scores using the Women and Men 'instruments' or the closed score SATB and Barbershop templates, this allows for different settings of those in the Mixer.