This you just must see – talkbox
Incredible 60s talkbox action from session musician ledgend and steel guitar whizz-kid, Pete Drake.
A talk box is an effects device that allows a musician to modify the sound of a musical instrument. The musician controls the modification by changing the shape of their mouth.
The effect can be used to shape the frequency content of the sound and to apply speech sounds (in the same way as singing) onto a musical instrument, typically a guitar (its non-guitar use is often confused with the vocoder) and keyboards.
A talk box is usually an effects pedal that sits on the floor and contains a speaker attached with an air tight connection to a plastic tube, however, it can come in other forms, such as the ‘Ghetto Talkbox’ (a homemade version which is usually crude) or higher quality custom made versions. The speaker is generally in the form of a horn driver, the sound generating part of a horn speaker with the horn replaced by the tube connection.
“According to an interview of Pete Drake “You play the notes on the guitar and it goes through the amplifier. I have a driver system so that you disconnect the speakers and the sound goes through the driver into a plastic tube. You put the tube in the side of your mouth then form the words with your mouth as you play them. You don’t actually say a word: The guitar is your vocal cords, and your mouth is the amplifier. It’s amplified by a microphone.”