Operation Manual

ADOBE AUDITION 3.0
User Guide
88
Generating audio
Generate DTMF signals
Dual Tone Multi-Frequency (DTMF) signals (also known as touch tones) are used for dialing telephone numbers
over phone lines. These signals are recommended for push-button telephones by the International Telegraph and
Telephone Consultative Committee. Keep in mind that the DTMF signals generated by telephone push-button
keypads are different from the Multi-Frequency (MF) tones generated by the telephone network to transmit infor-
mation. You can use the DTMF Signals command to generate MF tones as well.
1 Place the cursor where you want to insert the signals. Or, if you want to replace part of the existing waveform,
select the desired range of audio data.
2 Choose Generate > DTMF Signals (Process).
3 Set options as desired, and click OK.
DTMF options
Dial String Specifies the phone number for which you want to generate tones. You can also enter other characters,
such as the asterisk (*) and pound (#) symbols, as well as the letters “A,” “B,” “C,” and “D.” Entering the pause character
(see “Pause Character” in this list) inserts a pause of a defined length.
Tone Time Specifies the milliseconds for which the tones will last. The standard time for DTMF tones is 100 milli-
seconds.
Break Time Specifies the number of milliseconds of silence between successive tones.
Pause Time Specifies the length that is assigned to the pause character when it is used in the Dial String text box.
Pause Character Specifies which character Adobe Audition interprets as a pause.
DTMF Signals Generates DTMF signals by using combinations of the frequencies 697 Hz, 770 Hz, 852 Hz, 941 Hz
and 1209 Hz, 1336 Hz, 1477 Hz, and 1633Hz.
MF Signals (CCITT R1) Generates MF signals (tones that are internal to telephone networks) using paired combina-
tions of the frequencies 700 Hz, 900 Hz, 1100 Hz, 1300 Hz, 1500 Hz, and 1700 Hz.
Custom Specifies the combinations of frequencies to be used in generating signals. Select this option, and then enter
values in the Hz text boxes of the keypad.
Amplitude Determines the volume level (as a percentage) of the tones generated, where 100% means maximum
volume without clipping.
Twist Specifies how much louder the higher frequency tone is from the lower frequency tone. Enter a value (in
decibels) in the Twist text box to increase the volume of the higher frequency tone accordingly.
Reset To DTMF Clears any custom frequency entries and replaces them with the standard DTMF frequency combi-
nations.