Audio Midi Setup: Set up your audio devices

Set up your audio devices using Audio MIDI Setup

Use Audio MIDI Setup to set up audio input and output devices you use with your computer, such as microphones and multichannel audio interfaces.

The settings you can change in Audio MIDI Setup depend on the audio device you’re using. For example, you can adjust the volume for each channel your audio output device has available, if the device supports volume control.

  1. Connect your audio devices to your computer and, if necessary, install any software included with the devices.

    See the documentation that came with your audio devices.

  2. Open Audio MIDI Setup (in the Utilities folder in Launchpad).
  3. Choose an audio device from the list on the left side of the Audio Devices window.
    • To use the device for sound input, choose “Use this device for sound input” from the Action pop-up menu (looks like a gear).

    • To use the device for sound output, choose “Use this device for sound output” from the Action pop-up menu.

      If you also want to use the device to play system sounds, choose “Play alerts and sound effects through this device” from the Action pop-up menu.

  4. On the right side of the Audio Devices window, choose the options available for the device you’re setting up:
    • In most cases, leave the “Clock source” pop-up menu on the default setting.

    • To set up surround (multichannel) speaker configurations, click Configure Speakers, and then choose the type of configuration you want to use.

      Set up external speakers for stereo or surround sound

    • You can set the sample rate and bit depth in the Format pop-up menus. Make sure they match the appropriate settings for your audio device, and that the input and output sample rates are set to the same value.

    • If your computer contains support for the hardware sample rate converter, the Hardware Rate Converter pop-up menu is available in the Input menu. When you choose Automatic from the pop-up menu, the hardware sample rate converter is turned on if the audio samples coming in are PCM and formatted according to the international standard IEC 60958-3. The hardware sample rate converter is turned off if the input stream is encoded. You can also choose Enable or Disable from the menu to keep the hardware sample rate converter turned on or off.

      Note: If you choose Enable from the menu, you may not be able to stream non-LPCM or encoded audio because the audio may not be recognized.
    • If software volume control is available for your device, the Volume sliders are blue to indicate they are active. Drag the sliders to set the volume for each channel.

If the audio device doesn’t appear in the list in Audio MIDI Setup or if it doesn’t work, make sure it’s connected correctly to your computer and that you installed any software included with the device.

Last Modified: May 15, 2012
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  • Last Modified: May 15, 2012
  • Article: PH5176
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