In the 17th century, screws were added to fasten the snares which provides for a brighter sound. Metal snares surfaced in the 20th century. In the book entitled The Art of Snare drumming by Sanford Moeller, it is said that studying military drumming is needed to be familiar with the nature of the snare drum because its true character is as a military instrument. Uses of the bugle Bugles are used for bugle calls which indicate the start of camp daily routines. These were also for assembling leaders and for announcing marching commands in camp. The bugle developed further from its military foundation in the bugle and drum corps. Typically, it is pitched in G or B flat. It was used by swing clarinetist like Artie Shaw and also by jazz musicians namely Alcide Nunez and Louis Nelson Delisle. But as the big bands popularity faded, so did the clarinets central position in jazz. It was also used in pop and rock music. Its diversity in the sound production gave it a chance on many genres. The length of the pipe is not the only factor that affects pitch because the breath pressure does too. This requires crumhorns to be at a fixed dynamic level when played and shortening notes implies crumhorn dynamics. The change in pitch of sound produced by the bagpipe while the player fills the bag is comparable to the variation in pitch caused by breathing changes. It is sometimes referred to as double virginals. The clavicytherium has its strings and soundboard placed perpendicularly in front of the player just like the upright piano. On the other hand, the spinet has its strings set at a 30 degree angle from the keyboard. The folding harpsichord is the version of the harpsichord that is suitable for travel. The Musicman Stingray arrived in the 1970 s with a humbucker bass pickup while the Gibson Thuderbird came on scene in the 1960 s. The Rickenbacker 4001 came in the early 1950 s and it became the rock bass chosen by many. Playing techniques The different playing techniques include plucking, picking, slap and pop, two-handed tapping, and fretting.