DTMF Tone Generator Applet The applet generates DTMF (Dual Tone Multi-Frequency) tones as used on TouchTone phones. The number can be dialled by clicking the appropriate buttons on the keypad or pressing the keys 0 - 9, *, # etc on your keyboard. Alternatively, click in the text field and type in the phone number, then click "Dial". If you hold a TouchTone phone close to the speaker, the tones should register as if you dialled them on the phone keypad. in Public bookmarkswith audiophoneby 2 users