Audio frequencies

How to Change the Sample Rate of Your Audio

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From time to time, you may wish to change the sample rate of your audio.

Depending on what program you have, there are different steps to complete.

Software To Change the Sample Rate of Audio Files

This article walks you through how to change the sample rate of your audio in your choice of four different professional-grade audio software:

  • Quicktime Pro
  • Final Cut Pro
  • Adobe Premiere Pro
  • Sony Vegas Pro

Quicktime 7 Pro

Setting up Custom Template in Quicktime

  1. Under File > Render As…change the Save as Type: to Quicktime 7.
  2. Click the Custom button. This opens the Custom Template window.
  3. Click on the Audio tab.
  4. In the Audio tab, click on the drop-down menu next to Sampling Rate (Hz) and select 48,000.

Using the Encoder Button in Quicktime

  1. Visit the Inspector window in the Compressor.
  2. Click on the Encoder button.
  3. In the Encoder window, you will see a Settings button to the right of Audio. Click on Settings.
  4. This opens the Sound Settings window. In the Sound Settings window, there is box to the right of Rate. In this box, enter 48.000 kHz.

Final Cut Pro

MPEG2

In Final Cut Pro, there is no overt way to change the audio sampling rate for the MPEG2 file container. However, if your audio sample rate is not at least 44.1 kHz and you are working within the MPEG2 container, then do the following.

  1. Visit the Inspector window in the Compressor.
  2. Click on the Encoder button.
  3. In the Encoder window, you will see an Extras tab. Click on the Extras tab.
  4. In the Extras tab, check the box next to Multiplexed MPEG-1/Layer 2 Audio. Underneath, there are two radio buttons corresponding to Transport Stream and Program Stream, respectively. Choose the audio stream that corresponds the video stream that you chose.

Adobe Premiere Pro

MPEG2

  1. Visit the Export Settings window (File > Export > Adobe Media Encoder).
  2. In the Export Settings window, click on the Audio tab.
  3. In the Audio tab, there is a set of options called Basic Audio Settings. Click on the drop-down menu to the right of Frequency and change your audio sampling rate to 44.1 kHz. Google only accepts audio ads that have an audio sampling rate of 44.1 kHz.

H.264

  1. You can change the audio sampling rate of your spot in the Export Settings window (File > Export > Adobe Media Encoder).
  2. In the Export Settings window, click on the Audio tab.
  3. In the Audio tab, there is a set of options called Basic Audio Settings.
  4. Click on the drop-down menu to the right of Frequency and change your audio sampling rate to 44.1 kHz. Google only accepts ads that have an audio sampling rate of 44.1 kHz.

Sony Vegas Pro

MPEG2

  1. Under File > Render As, change the Save as Type: to MainConcept MPEG-2.
  2. Next, click the Custom button. This opens the Custom Template window.
  3. Click on the Audio tab.
  4. In the Audio tab, you will see a drop-down menu to the left of Sampling Rate (Hz). Click this drop-down menu and select 44,100.
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