different between sousaphone vs wagneriantuba

English

Named after American composer and conductor John Philip Sousa +? -phone.

sousaphone (plural sousaphones)

(music) A valved brass instrument with the same length as a tuba, but shaped differently so that the bell is above the head, that the valves are situated directly in front of the musical instruments and a few inches above the waist, and that most of the weight rests on one shoulder.
Coordinate terms: helicon, tuba
- 1990, Thomas D. Rossing, The Science of Sound, page 230
  One version of the large tuba, popular in marching bands, is called a sousaphone in honor of bandsman John Philip Sousa.

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