Configure audio

Your DVI2USB 3.0 can capture audio directly from non-encrypted HDMI sources. The Epiphan Capture Tool can also capture audio from other audio devices plugged into your capture workstation (e.g. embedded laptop microphone or external microphone plugged in via USB or audio in jack).

By default, the Epiphan Capture Tool doesn't capture audio, but configuring it is simple!

Step 1: Select your audio source

Start by picking the audio source you want to capture. You can do this from either the Tools » Options menu, or directly from the Capture menu.

To select your audio source:

  1. Configure your external audio source with your operating system (generally no configuration is needed for embedded microphones).
  2. Or, connect your HDMI source to the video grabber.
  3. Connect the video grabber to a USB 3.0 port on your capture workstation (you can use USB 2.0 if you're planning to use an external audio source instead of embedded audio).

Due to the extra volume of data that needs to be captured, embedded audio capture is only supported when connected via USB 3.0.

  1. Launch the Epiphan Capture Tool.
  2. Select the Tools » Options menu item, the Options dialog appears.
    1. Select the Audio tab.

    1. If capturing embedded HDMI audio, select Frame Grabber.
    2. If using an external audio source, click Specific Windows audio input device and select your audio device from the list.
    3. If desired, use the Audio format drop down to specify the audio bit rate you want saved (or streamed), Stereo/mono and bit-depth. (If this value is different than the incoming audio bitrate, DVI2USB 3.0 resamples the audio to your specified bitrate.)
    4. If desired, check the Play captured audio checkbox to have the audio played over the capture workstation's audio output device (e.g. speakers or headphones connected to the capture workstation).
    5. Click OK or Apply.
  1. Alternatively, select Capture » Audio Input Device and select your audio source from the list.

Step 2: Enable audio capture

You can tell whether audio capture is enabled by looking at the toolbar. If the speaker icon is still (no sound waves depicted coming out from it), audio is not enabled. See the examples below.

Audio enabled

 Audio disabled

 

 

To enable audio capture:

  1. Launch the Epiphan Capture Tool.
  2. Click the Capture Audio button (speaker icon) on the toolbar; when audio capture is enabled, the icon is animated with sound waves.

To disable audio capture:

  1. Click the Capture Audio button; the icon has a static image.

Step 3: Capture!

Use the record button on the toolbar to capture your audio/video stream!

HDMI audio capture may fail if your device has an old or incorrect EDID loaded. See Update device EDID.