bladder-pipe. Instr. similar to bagpipe which existed from 13th to 16th cents. and was sometimes called platerspil. Attempted to combine bagpipe's continuous air flow with a means of stopping and starting more easily, thus making some kind of tonguing and articulation possible. This it did by using elastic animal bladder which expelled air down the pipe by its own elasticity instead of, as in the bagpipe, by arm pressure on animal skin.
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