Double and Triple tonguing
Description: compound tonguing in groups of two or three.
Notation: The notation example shown is often used to indicate double and triple tonguing, but players will often use the technique to play passages of notes that may be written as ordinary tongued or staccato notes.
Comments: Double tonguing requires the player to form syllables with their toungue whilst blowing such as 'ta-ka, ta-ka, ta-ka' (or possibly 'da-ka') in order to create very rapid articulation.
Triple tonguing would involve repeating a pattern such as 'ta-ka-ta' to group notes in threes.
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About double tonguing...