If your computer's audio output was set to a particular sample rate when you created a Motion project and then you change that sample rate, you may not be able to hear your project's audio tracks when you open it. This can happen even when the audio tracks and waveforms are properly displayed.
This issue can occur with both your computer's built-in audio outputs and third-party sound cards.
For example, let's say you set the Digital Out/Headphones source in Audio MIDI Setup to 44.1 KHz. Then you create a new Motion project, do some work with graphics and audio, and save it. If you go back to Audio MIDI Setup and change the Digital Out/Headphones source to 48 KHz, the next time you open your Motion project, the sound won't be audible.
To correct this, you can edit the project file:
- Close your Motion project.
- Make a backup of your Motion project file.
- Open your original Motion project with TextEdit (you can just drag the project onto the text edit icon in the Dock or your applications folder.)
- Find
in the document (Command-F will bring up the Find window). - Look for a line that begins with <audioSampleRate> .
- Select and delete the entire <audioSampleRate> line (see illustrations below).
- Save the changed Motion project file.
- Open your project in Motion and confirm that you can now hear audio.
Audio MIDI Setup is where you can configure the audio input and output settings on your computer. Click here to learn more about Audio MIDI Setup.
Note: There may be a second entry of <audioSampleRate> under <exportSettings>. This should be left in the project file.
This document will be updated as more information becomes available.
This issue does not occur in Motion 2.
Important: Information about products not manufactured by Apple is provided for information purposes only and does not constitute Apple's recommendation or endorsement. Please contact the vendor for additional information.