Put one of these caps on the end of a Boomwhackers Tube and presto- boomo!, you?ve lowered the tone by an \ octave! (That?s 8 notes if you?re counting.)
Play the tubes as usual or hold them vertically and tap on the floor, etc., as a "stamping" tube.
Placed on the higher octave tubes, these will create the same tones as the bass octave tubes. Placed on the bass octave tubes, they go down another octave, making a 3-octave range possible.
Which set to buy? How many do you need? The Diatonic set will need the 8-pack, but the chromatic and pentatonic sets only need the 6-pack.
