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• Audio signals will be present on both of the front and back panel audio connections simultaneously. If you want to mute the back panel audio (only supported when using an HD front panel audio module), refer to instructions on the next page. High Definition Audio (HD Audio) HD Audio includes multiple high quality digital-to-analog converters (DACs) that support 44.1KHz/48KHz/ 96KHz/192KHz sampling rate. HD Audio features multistreaming capabilities that allow multiple audio streams (in and out) to be simultaneously processed. For example, users can listen to MP3 music, have an Internet chat, make a telephone call over the Internet, and etc. all at the same time. A. Configuring Speakers (The following instructions use Windows Vista as the example operating system.) Step 1: After installing the audio driver, the HD Audio Manager icon will appear in the notification area. Double-click the icon to access the HD Audio Manager. (Note) 2/4/5.1/7.1-Channel Audio Configurations: Refer to the following for multi-channel speaker configurations. • 2-channel audio: Headphone or Line out. • 4-channel audio: Front speaker out and Side speaker out. • 5.1-channel audio: Front speaker out, Side speaker out, and Center/Subwoofer speaker out. • 7.1-channel audio: Front speaker out, Rear speaker out, Center/Subwoofer speaker out, and Side speaker out. Step 2: Connect an audio device to an audio jack. The The current connected device is dialog box appears. Select the device according to the type of device you connect. Then click OK. Step 3: On the Speakers screen, click the Speaker Configuration tab. In the Speaker Configuration list, select Stereo, Quadraphonic, 5.1 Speaker, or 7.1 Speaker according to the type of speaker configuration you wish to set up. Then the speaker setup is completed. B. Configuring Sound Effect You may configure an audio environment on the Sound Effects tab. C. Activating an AC'97 Front Panel Audio Module If your chassis provides an AC'97 front panel audio module, to activate the AC'97 functionality, click the tool icon on the Speaker Configuration tab. On the Connector Settings dialog box, select the Disable front panel jack detection check box. Click OK to complete. D. Muting the Back Panel Audio (For HD Audio Only) Click Device advanced settings on the top right corner on the Speaker Configuration tab to open the Device advanced settings dialog box. Select the Mute the rear output device, when a front headphone plugged in check box. Click OK to complete. 5-2-2 Configuring S/PDIF In/Out The S/PDIF In and Out cable (optional) provides S/PDIF In and S/PDIF Out functionalities. Optical S/PDIF Out Optical S/PDIF In Coaxial S/PDIF Out Coaxial S/PDIFIn A. Installing the S/PDIF In and Out Cable: Step 1: First, attach the connector at the end of the cable to the SPDIF_IO header on your motherboard. Step 2: Secure the metal bracket to the chassis back panel with a screw. B. Configuring S/PDIF In: The S/PDIF In jacks on the SPDI/F In and Out cable allow you to input digital audio signals to the computer for audio processing. Step: After connecting the S/PDIF In device, access the Digital Input screen. Click the Default Format tab to select the default format. Click OK to complete. (Note) The actual locations of the SPDIF In and SPDIF Out connectors may differ by model. C. Configuring S/PDIF Out: The S/PDIF out jacks can transmit audio signals to an external decoder for decoding to get the best audio quality. Install the S/PDIF in and out cable (or connect a S/PDIF optical cable to the optical S/PDIF out connector on the motherboard back panel) if you want to output S/PDIF digital audio signals to an external decoder. C-1. Connecting a S/PDIF Out Cable: Step: Connect a S/PDIF coaxial cable or a S/PDIF optical cable (either one) to an external decoder for transmitting the S/PDIF digital audio signals. S/PDIF Coaxial Cable S/PDIF Optical Cable C-2. Configuring S/PDIF Out: Step: On the Digital Output screen (Note), click the Default Format tab and then select the sample rate and bit depth. Click OK to complete. (Note) Enter the Digital Output(Optical) screen to configure further settings if you use the S/PDIF Out connector(s) on the back panel for digital audio output or enter the Digital Output screen if you use the internal S/PDIF In/Out connector (SPDIF_IO) for digital audio output. 5-2-3 Enabling the Dolby Home Theater Function Before Dolby Home Theater is enabled, you get only 2-channel playback output (from the front speakers) when playing 2-channel stereo sources. You must play 4-, 5.1-, or 7.1- channel content to get 4-, 5.1-, or 7.1- channel audio effects. With Dolby Home Theater enabled, 2-channel stereo content will be transformed into multi-channel audio, creating a virtual surround sound environment (Note). Install the Dolby GUI Software driver from the motherboard driver disk. Click the Start icon . Point to All Programs, Dolby Control Center to access the utility. (The following illustration demonst...