What is a Straight Mute?

A straight mute is a type of brass mute placed in the bell of instruments such as the trumpet, trombone, or French horn to alter the instrument’s tone. It is one of the most commonly used mutes in orchestral and band music.

The straight mute typically has a conical shape and is made from materials such as metal, aluminum, fiber, or wood. When inserted into the bell, it produces a bright, slightly nasal, and focused sound, reducing the instrument’s natural resonance while adding a distinctive tonal color.

Straight mutes are widely used in orchestral, concert band, and film music to create contrast and variety in brass sections. Composers often mark passages with “straight mute” or simply “mute” to achieve a sharper and more penetrating muted brass sound.