Arm-wah
This is a cool technique that can make your ‘ukulele sound like it is being played through a wah-wah pedal or some other kind of modulation effect. The reason you hear this sound is because your arm dampens the vibrations of the wood and in turn the treble frequencies. All it really is is a tone control. It is an interesting way to fade out the last chord of a song.
To play the arm-wah hold your ‘ukulele like you would to play a note, with your arm resting on the top-right corner of the sound-box (vice-versa for lefties). Your arm should angle out and above the sound-board. Play a note or chord and then lay your arm on top of the sound-board bringing your arm parallel to the bridge with your hand pointing at the ground, then roll it back off. You can do this as many times as you like as long as the note(s) sustain. Wah-wah-wah-wah-wah…
[...] 6. Live Ukulele – Good site with some really good beginners basics, and also the first place I saw the essential uke technique known as Arm Wah [...]