Generating DTMF/MF Tones

Insert Menu:

You can use DTMF/MF Tones dialog to generate the standard dial tones used by telephone companies. To display this dialog, choose Synthesis from the Insert menu, and choose DTMF/MF Tones from the submenu.

  1. From the Insert menu, choose Synthesis, and choose DTMF/MF Tones from the submenu.

  2. In the Dial string box, type the phone number to be generated along with any necessary pause characters. Unknown characters will be ignored.

  3. Drag the Amplitude fader to set the peak level of the waveform.

  4. Click the radio button that corresponds to the type of tones you want to generate:

  • DTMF: Dual Tone Multi-Frequency signals are used by standard push-button telephones. They are generated using combinations of 679-, 770-, 852-, 941-, 1209-, 1336-, 1477-, and 1633-Hz sine waves.

  • MF: CCITT R1 signals are used internally by the telephone networks. They are generated by a combination of 700-, 900-, 1100-, 1300-, 1500-, and 1700-Hz sine waves.

  1. In the Single tone length box, specify the duration of each tone.

  2. In the Break length box, specify the duration of the silence between tones.

  3. In the Pause length box, specify the duration of the silence that will be inserted when the Pause character is used.

Sound Forge Pro idea DTMF/MF TonesSelect the Fade the edges of each tone check box to fade each tone in and out to prevent glitching.

  1. In the Pause character box, specify the character that will cause a pause between successive tones in the dial string.

  2. Choose a position from the Insert new tone sequence at drop-down list to determine where the generated waveform will be placed within the current data window.

  3. Click the OK button.

For more information about using processing dialog controls, click here.