Resampling

From the Process menu, choose Resample, and then choose Resample from the submenu to change the sample rate of an existing sound file.

Resampling data changes the number of recorded samples per second. When changing to a higher sample rate, extra samples are interpolated and the file size increases. When changing to a lower sample rate, some samples are removed and the file size decreases.

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

ClosedResample your data

  1. From the Process menu, choose Resample.

  2. In the New sample rate box, specify the sample rate to which the sound file will be converted.

    NOTE In the New sample rate box, specify the sample rate to which the sound file will be converted.

  3. Set the Phase Setting to select from Minimal, Intermediate or Linear processing.

    For most use cases, the Intermediate setting delivers best results. When you want to have a better preservation of the phases of the audio at all frequencies, you can chose Linear, for the price of the introduction of pre-/post-ringing at the transients. With the Minimal setting you get the best preservation of the transients, but the phases of the lower frequencies will vary.

  4. Optionally select the Allow aliasing/imaging above 3dB option. Anti-Aliasing usually should be active to avoid aliasing artifacts, that are created when down-sampling a signal that contains frequencies above half of the new sample rate. When you are sure that the signal contains no frequency above the one-half of the sampling rate (the Nyquist frequency) you can activate the option to fasten the processing speed and reduce ringing artifacts.

  5. Click the OK button.

ClosedSet the sample rate without resampling

When you convert between two very close sample rates and want to process the file quickly, you can change the sample rate without resampling. However, the original pitch of the file is not preserved.

  1. From the Process menu, choose Resample.

  2. In the New sample rate box, specify the sample rate to which the sound file will be converted.

  3. Select the Set the sample rate only check box to change the playback rate without resampling the data. This means that the original pitch of the file is not preserved.

  4. Click the OK button.

TIP

To set the sample rate quickly, right-click the Sample Rate box in the status bar and choose a new rate from the shortcut menu.