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The long pipe resting on the player's shoulder. It produces a constant bass note (usually two octaves below the tonic of the chanter). It has a single reed (a tongue vibrating against a body). The "tuning slide" allows the player to change the pitch to match the chanter.
If you meant something else entirely (a person, a local saying, or a misspelling of guitarra , gorra , etc.), please clarify. galiciqn gotta