DTMF Tone Generator

Generate DTMF phone tones with a dial pad interface using Web Audio dual-tone synthesis

Tone Duration: 150 ms

Volume: 50%

DTMF (Dual-Tone Multi-Frequency) uses two simultaneous tones per key: Row freqs: 697, 770, 852, 941 Hz Col freqs: 1209, 1336, 1477 Hz Each key produces the combination of its row and column frequency.

Quick Dial

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