Insert

You can insert silence, noise, or a waveform in an audio file or selection. When you choose Process > Insert, then choose one of the three items from the Insert submenu, the silence, noise, or waveform is inserted at the current playhead position. The remainder of the audio file ripples so that it continues after the inserted silence, noise, or waveform.

Inserting Silence

When you choose Process > Insert, then choose Silence from the Insert submenu, the Insert Silence dialog appears. You can set the length of silence to insert, and choose the format for setting the length of the silence (any of the Time Ruler Units formats).

Figure. Insert Silence dialog.
To set the length of the inserted silence
  1. In the Insert Silence dialog, choose the format you want to use from the Format pop-up menu.

  2. In the “Length of silence to insert” value slider, do one of the following:

    • Click the left arrow to shorten the length of the inserted silence, or click the right arrow to increase the length.

    • Click the center of the value slider, then drag the slider that appears left or right to change the length of inserted silence.

    • Click the value in the value slider, then type a new value.

  3. Click OK.

Inserting Noise

When you choose Process > Insert, then choose Noise from the Insert submenu, the Noise Generator dialog appears. You can set the type of noise to insert, set the length of the inserted noise, choose the format for setting the noise length (any of the Time Ruler Units formats), and set the volume of the inserted noise.

The inserted noise can be white noise (emphasizing higher frequencies) or pink noise (equal distribution of frequencies).

Figure. Noise Generator dialog.
To choose the type of noise to insert
  • In the Noise Generator dialog, choose the type of noise from the Waveform Type pop-up menu.

To set the length of the inserted noise
  1. In the Noise Generator dialog, choose the format you want to use from the Duration pop-up menu.

  2. In the Duration value slider, do one of the following:

    • Click the left arrow to shorten the length of the inserted noise, or click the right arrow to increase the length.

    • Click the center of the value slider, then drag the slider that appears left or right to change the length of inserted noise.

    • Click the value in the value slider, then type a new value.

  3. Click OK.

To set the volume level of the inserted noise
  • In the Noise Generator dialog, drag the Volume slider left or right to set the noise level. You can also type a level (in decibels) in the Volume field.

Inserting a Waveform

When you choose Process > Insert, then choose Waveform from the Insert submenu, the Waveform Generator dialog appears. You can set the type of waveform to insert, set the length of the inserted waveform, choose the format for setting the waveform length (any of the Time Ruler Units formats), and set the volume of the inserted waveform.

The inserted waveform can be a sine, sawtooth, square, or triangle wave.

Figure. Waveform Generator dialog.
To choose the type of waveform to insert
  • In the Waveform Generator dialog, choose the type of waveform from the Waveform Type pop-up menu.

To set the frequency of the inserted waveform
  • In the Waveform Generator dialog, drag the Frequency slider left or right to set the frequency. You can also type a frequency (in Hertz) in the Frequency field.

To set the length of the inserted waveform
  1. In the Waveform Generator dialog, choose the format you want to use from the Duration pop-up menu.

  2. In the Duration value slider, do one of the following:

    • Click the left arrow to shorten the length of the inserted waveform, or click the right arrow to increase the length.

    • Click the center of the value slider, then drag the slider that appears left or right to change the length of the inserted waveform.

    • Click the value in the value slider, then type a new value.

  3. Click OK.