Peter Frampton's fame came partially from his use of the 'talk box'. I've never truly understood the instrument. Is he just talking into a gizmo? What's so hard about that? - Quora
1976 Electro-Harmonix Golden Throat Talk Box Mouth Tube Vintage Original Guitar Pedal
The Talk Box: Intriguing History of the Sound Effect | Articles @ Ultimate- Guitar.Com
Why do people sing with a tube in their mouth? - Quora
Talk box - Wikipedia
Building a Talkbox | General Guitar Gadgets
Paul Citone Photography
How did Peter Frampton make that guitar sound with his mouth? - Quora
How Talk Boxes Work | HowStuffWorks
Jimi Hendrix: Rock guitarists make their insturment sound like a human voice with the help of a wah-wah pedal.
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