Csound Blog: Touch-Tone DTMF Generator

The Csound Blog
Issue #13

Most people would never think of a touch-tone phone as being an additive synthesizer. Though it may be primitive, a phone does generate tones using two sine wave oscillators, which in my humble opinion, qualifies it as such.

However, I’m not here to debate the semantics of whether or not a phone is a synthesizer. Instead, I’m here to demonstrate how easy it is to emulate the sounds of the touch-tone phone.


  • DTMF
  • macros
  • additive

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