The string linkage, on the other hand, moves the parts of the valve with a string that is wrapped around them. The only disadvantage of mechanical linkage is that it produces a clicking noise. Mechanical linkage has metal arms with ball and socket joints and requires less maintenance than a string linkage. Trigger trombones can operate with either mechanical or string linkage, and while they serve the same purpose, they differ in how they are constructed. As such, many beginners start with a closed wrap before transitioning to the open wrap. Additionally, it is less exposed to accidents, making it a good option for beginners who are learning to play the instrument. Its tubing is better protected against dings and scratches, as well as damage to the tuning slide. While both types have their advantages, the majority of players prefer the open wrap as it provides a less restrictive airflow due to its fewer bends.ĭespite the preference for open wraps, the closed wrap has its own unique benefits.
The open wrap allows the F-attachment to extend beyond the crook of the bell section, while the closed wrap keeps the tubing confined within. The two types of trigger trombone – open and closed – are distinguished by the way the F-attachment tubing is arranged. This attachment was invented by Christian Friedrich Sattler, a German instrument maker of the 19th century, and has since become a popular feature of many trombones.
This additional tubing is activated by either a mechanical or string linkage, and allows players to easily reach the F key and lower tones. A trigger trombone is a type of trombone that features additional tubing that can be arranged in either an “open” or “closed” wrap.